Rhododendron species A-L
RHODODENDRON SPECIES M-Z
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Rhododendron macabeanum (HY, hy, Grandia) 5, 10oF, VE-EM, 4-5/4-5. This is a tree rhododendron that will eventually reach 45 height. Foliage is enormous, 18" x 8", smooth, dark green on top and whitish woolly, or light tan indumentum underneath. Large trusses of up to 20, are usually compact but can be rather loose. Flowers, 2-3" long, are light creamy yellow to deep yellow or greenish yellow, purple blotched at the base. OUTSTANDING!
20469 Rhododendron macabeanum Cecil Smith form A selection of R. macabeanum from the Cecil Smith gardens with outstanding yellow flowers. 6-10", 10-15", 30-36"
20028 Rhododendron macabeanum Cecil Smith form selfed Grown from self seed in Cecil Smiths garden near Newburg, OR. 30-36", 48-60"
20436 Rhododendron macabeanum KW 2034 A form from the famous Kingdon-Ward collection. 48-60"
20176 Rhododendron macrophyllum (HY, hy, Pontica) 5, -5oF, M-L, 2-3/2-3. While the rating of this flower is on the low side there are exceptions to this generalization. Nice, full trusses are common among the many variations in color of this species. From pure white to shades of pink to red...they are all possible. This native to the west coast has large leaves, sometimes as large as 10". These plants have purposely not been pinched so that they may attain their typical tall stature as they do in the wild. 10-15"
20007 Rhododendron macrophyllum Albion Ridge (selected white clone macrophyllum) 6, 15oF, M, 3/3. Foliage is large, to 6½" long. White flowers, sporting small green blotches are held in trusses of up to 15 blooms. Flowers are 2½" wide and are attractively ruffled. 6-10"
20247 Rhododendron macrophyllum Seven Devils Native to the coast of Oregon, this plant was named after the Seven Devils hills which form the rugged ocean side cliffs between Bandon and Coos Bay. Leathery leaves are medium large to about 5". Loose trusses of 2" pink to deep pink flowers grace this shrub. 6-10", 10-15"
20383 Rhododendron magnificum (HY, hy, Grandia) 5, 10°F, VE-E, 4/4-5/3. The name of this species describes it well, for it is truly magnificent. Leaves are oblong to oblong obovate, extremely large, to 18" x 9", dark matte green. The reverse sides have a thin covering of whitish or light tan indumentum. Rose-purple flowers, to 3" long, tubular-bell-shaped, are held in gigantic, compact trusses of up to 30 flowers. Very close to R. protistum and R. giganteum, differing from both in its leaf shape. Native to Burma-Tibet frontier, 6,000-8,000 ft. 10-15", 48-60"
20292 Rhododendron makinoi (HY, hy, Pontica) 3, -10oF, ML, 3-4/4. This unusual plant is most desirable for its superb foliage which is curved downward and backward. The long, narrow bright green leaves are slightly puffy and wrinkled on the tops, indumented underneath with a thick, tawny cover. The delightful, clear light pink flowers, occasionally spotted crimson, are carried in trusses of up to 10. This species has a rounded habit and is slow growing when young. 10-15", 15-21"
20533 Rhododendron mallotum (HY, hy, Neriiflorum) 3, 10oF, E, 2-3/4. Dark crimson flowers are 2 tubular-bell-shaped in compact trusses up to 15. Lovely rounded leaves of dark green. A really nice plant. 10-15"
20493 Rhododendron maximum hy, hy, Pontica) 5, -25oF, L-VL, 3-3. Large oval dark glossy green leaves with broadly bell-shaped i" flowers. They are bink tipped in bud, and can range in color from white through shades of pink and rose, with yellow-green spots. With age it can reach 15. 10-15", 15-21", 21-30"
20104 Rhododendron maximum f. rubrum (HY, hy, Pontica) 5, -25oF, L-VL, 3/3. A very unusual form, this plant has flowers which range from white to pink, to red, even on the same truss. Like the typical R. maximum, it has large, long leaves. The flowers appear very late in the season, making it a valuable plant for the garden. 15-21"
20105 Rhododendron megeratum (RN, rn, Boothia) 18", 5oF, EM, 3/3-4. Growth habit is compact, mound-like, with very hairy branchlets and purplish, scaling bark. Small leaves are oval and shiny. Flowers, are 1 to 2" long, bell-shaped, creamy or yellow, and set in trusses of up to 3. Rare. 6-10"
20121 Rhododendron microgynum (Hy, hy, Neriiflora) 3, -5oF, EM, 3/4. Lovely deep crimson, bell-shaped flowers with darker spotting are accentuated by the superb deep green, thick foliage on this rhody. 15-21"
20257 Rhododendron montroseanum (HY, hy, Grandia) 5, 10oF, E-M, 3-4/4. Grows to form a small tree with very large, dark green leaves that have a thin coat of silvery indumentum. Bell-shaped flowers are white or white flushed rose, with crimson spots in trusses of 15-20. RARE! 48-60"
20106 Rhododendron morii (HY, hy, Maculifera) 4, -10oF, EM, 3-4/4. An extremely interesting species in that the foliage maintains a symmetrical "collar" around the stems and trusses. The leaves are oblong lance shaped, the tops glossy dark green, paler below. Bell shaped, 2" long flowers, pure white or white blushed with rose flowers, accented with slight crimson speckling or heavy red blotching, in loose trusses of 12-15, burst forth from soft pink buds. 30-36"
20201 Rhododendron moupinense (RN, rn, Moupinensia) 30", -5oF, VE, 4/3. The finest of the early blooming species. When all else is dreary, its large, showy, snow white flowers with a deep red-purple blotch, begin their annual display. The 1½" oval foliage is shining and polished looking. An added bonus is the bright bronzy red new growth that gives a second display after the flowers are gone. 3-6", 6-10", 10-15"
Rhododendron mucronatum See Evergreen Azalea section.
20425 Rhododendron mucronulatum (RN, rn, Rhodorasta) -20oF, EM, 4/4. This deciduous open and upright shrub is a real winter spirit-lifter, with flowers appearing well ahead of the leaves and long before any other hint of spring has shown. Orchid pink to rose-purple flowers. 6-10", 10-15"
20203 Rhododendron mucronulatum Cornell Pink . 5, -15oF, VE, 3-4/3. Here is a winter spirit lifter. Its early flowers appear long before any hope of spring has shown. A deciduous plant, it covers itself with clear pink blooms before any leaves appear. It is terrific. 6-10"
Rhododendron nakaharai (TT, tt) 1, -5oF, L-VL, 4/4. The habit for this little evergreen shrub is creeping, making it a good candidate for borders, rock gardens, or ground covers. Another plus is the late flowering, which misses all spring frosts. The leaves are tiny, only Ύ" long, the tops a glossy dark green, the reverse paler and a sparse covering of stiff flat hairs covering both sides. Flowers to 1" long are bell- shaped, rose-red to dark brick red, in clusters of 2-3.
20510 Rhododendron nakaharai Pink ES 1, -10oF, L, 4/4. A lovely clear pink with dark pink spotting on the three lower petals. Ive never met a nakaharai I didnt like, but the color on this one is outstanding! 10-15"
20343 Rhododendron nakaharai Sport Single, 1½" salmon pink flowers. Excellent for bonsai. 10-15"
20110 Rhododendron niveum (HY, hy, Arborea) 5, 5oF, EM-M, 3/3-4. A large shrub or small tree. Foliage has light tan indumentum. Flowers are purple lilac. 10-15", 48-60"
20359 Rhododendron occidentale (PE, pe, Pentathera) 5, 0oF, M, 4/3. A compact shrub that is native to the Pacific coast. Leaves are deciduous, about 4" long, elliptic and a glossy green, changing to yellow, scarlet or rose crimson in the fall. The delightfully fragrant, funnel-shaped flowers are shades of pink and white. 6-10", 10-15"
20361 Rhododendron occidentale Double form An exciting form of R. occidentale. This is a cutting grown selection that has a beautiful double flower of white, yellow and pink shades. Very different. 10-15"
20401 Rhododendron occidentale SM-28-2 White and pink flowers have up to 15 petals per corolla which give them a frilly look. 10-15"
20388 Rhododendron occidentale SM-189 A selection from the well known Smith Mossman collection. It is the largest flowering form with flowers 4" in diameter. 21-30"
20223 Rhododendron oldhamii (TT, tt) 4, 10oF, M, 3/3. This is an evergreen shrub, with 2 leaf types spring and summer. Spring foliage is medium size, roughly hairy on top, underside with rusty colored, spreading hairs. Summer leaves are either oval or elliptic. Widely funnel shaped flowers, to 2" across, are salmon red to brilliant brick red, set in trusses of 1-3. 6-10"
20263 Rhododendron orbiculare (HY, hy, Fortunea) 3, 5oF, EM-M, 3/4. The growth habit is compact, well-shaped and rounded. The bright green, heart shaped leaves are medium sized, almost round, and lobed at the base, the underside very glaucous. In loose trusses of 7-10, the rosy pink flowers are 7 lobed, to 2½" long, and occasionally have a bluish cast. They are widely campanulate in shape. 10-15"
Rhododendron oreodoxa var. fargesii (Hy, hy, Fortunea) 5, -10oF, E, 3/3. Growth habit is open and upright on this hardy, early flowering, rarely seen species. Elliptic to oblong leaves, to 3" long, are dark green on top, paler with a waxy, blue-green cast underneath. Tubular, bell-shaped flowers, to 2" long, range in color from white or pink to rose or rosy lilac, sometimes purplish spotted. This is a heavy bloomer, and fairly easy to grow; however, old flowers should be removed, as a heavy seed crop could severely damage the plant.
20400 Rhododendron oreodoxa var. fargesii Barto Rose Flowers on this form are a dark, rosy-pink. 6-10"
20213 Rhododendron oreotrephes (RN, rn, Triflora) 5, 0oF, EM, 3/4. This free flowering species has an upright growth habit typical of members of the Subsection Triflora. A striking glaucous cast occurs on the foliage, stem and buds of R. oreotrephes causing it to appear quite distinct amid garden surroundings. Its pendent small green leaves, red stems and chalk yellow buds are subdued in color by the bluish white cast. Rose- lavender flowers are present along the stems and stem tips. 6-10"
20326 Rhododendron ovatum (AZ, az) 3, 5oF, ML, 3/3. This species is quite rare in cultivation and somewhat tender. An erect, compact shrub, with small, ovate leaves that are bright red or pink when young. The flowers appear as singles coming from several buds at the ends of the branches. They are light pink with purple spots. From Eastern China. 6-10"
20294 Rhododendron pachysanthum (HY, hy, Maculifera) 30", -5oF, EM-M, 3-4/5. Very beautiful foliage! The leaves are smooth on top, with mature foliage displaying a thick covering of whitish tan indumentum underneath. This plant is similar to R. pseudochrysanthum, and is probably of equal hardiness. It shows all indications of being the R. yakushimanum of the future, possessing the best features of both R. pseudochrysanthum and R. yakushimanum. It also retains the lovely silvery tomentum on the leaf tops longer than R. pseudochrysanthum. Wide, bell shaped flowers are light pink to white, heavily spotted, and are set in trusses of 10-20 flowers. 10-15", 15-21"
20038 Rhododendron pachysanthum Britt Smith form A real favorite for its foliage, this has everything one could want in any garden. 10-15", 15-21"
20205 Rhododendron pendulum (RN, rn, Edgeworthia) 2, 10oF, E-M, 3/5. This straggling, open growing shrub has attractive, densely wooly new growth. Leaves are small and oblong, wrinkled on top, densely covered with fawn or brown cottony hairs. Flowers, in clusters of 2-3, are flat, saucer-shaped, white in color, tinged yellow inside, occasionally touched with pink. VERY RARE. 10-15"
20207 Rhododendron ponticum (HY, hy, Pontica) 4, -15oF, L, 2-4/4. This shrub has an upright and open habit, with leaves up to 9" long, dark glossy green on the top sides and paler on the reverse. Widely funnel-shaped flowers to 2" long, are deep reddish purple to white, or purple tinged pink, held in trusses of 10-15. 6-10", 10-15"
20224 Rhododendron ponticum Variegatum This showy form has white variegation along the margins of the leaves. Different and rare! 6-10", 15-21", 21-30", 30-36"
20473 Rhododendron praestans 5, 10oF, EM, 3/4. This excellent tree-like, large leaved will reach 18 x 8 at maturity with 15 - 20 flowers in a truss. There is a light indumentum under the leaves and the flowers range from pink, to magenta, to a deep purple-rose to white tinged pale yellow, blotched crimson. A real treat for a garden that has the area. 6-10", 10-15"
20556 Rhododendron primuliforum Cephalanthoides Group Doker La (RN,po). 3, 5oF, EM, 4/4. While the name means "with flowers like a Primula" the blooms are also like Daphne cneorum. This clone has very nice pink color saturation. Cox says "it seems to be an intermediate from between R. primuliflorum and R. trichostomum. It has highly aromatic small foliage. 6-10"
20140 Rhododendron principis (Hy, hy, Taliensia) 5, -5oF, E, 3-4/4. This plant has very beautiful foliage. Very narrow lance-shaped leaves, up to 5" long are pale to dark green, hairless on top and covered thickly with silvery to creamy white or fawn indumentum underneath. Bell-shaped flowers, to 1½" long, are white or rose, spotted carmine or purple and carried in somewhat tight trusses of 15-20. Leaves have a plastered, polished look in spite of indumentum. 15-21"
20004 Rhododendron pronum (HY, hy, Taliensia) 1, -10oF, EM-M, 3/4-5. This interesting dwarf shrub is slow growing and prostrate. It has distinctively gnarled, rooting branchlets, and leaf bud scales that persist for many years. Bell-shaped flowers are creamy yellow and generously spotted deep crimson. 6-10", 10-15"
Rhododendron proteoides (HY, hy, Taliensia) 1, -10oF, EM, 3/5. This is a rare and unusual species; a slow growing, tightly compact and spreading shrub, with typically outstanding R. taliense foliage. Thick, woolly red-brown indumentum on the underside of nicely shaped, rich green leaves contributes much to the appeal of this plant. Bell-shaped flowers are pink in the bud, opening to creamy white or white blushed rose, generously spotted crimson. Difficult to propagate. The connoisseur/collectors ultimate goal.
20394 Rhododendron proteoides Cecil Smith form This is a very special form that has darker pink buds and shows more rose blush than the species. 6-10" $35.95
20452 Rhododendron protistum (HY, hy, Grandia) 6, 20°F, VE, 3/3-4/3. "Grande" describes this plant well. It is a spectacular, large leaved, treelike shrub, with foliage that can reach 18 x 9. The young growth is densely covered with tawny indumentum. Mature leaves are lanceolate to oblanceolate, with dark impressed veins on top. Trusses are beautiful and large, holding 20 to 30 flowers each. Bell shaped flowers are 2 long and are creamy white, blushed with rose. A truly fine species. Different from R. giganteum in its usually glabrous lower leaf surface. 15-21"
20298 Rhododendron pseudochrysanthum (HY, hy, Maculifera) 1-3,-10oF, EM, 3/4-5. This dense, compact shrub has glossy dark green leaves, paler on the undersides, slightly hairy on both sides. Dark pink buds open to 2" long, bell-shaped flowers, pale pink or white, occasionally displaying rose lines outside and crimson spotting inside. They are held in trusses of 9-20. 6-10", 10-15"
20228 Rhododendron pseudochrysanthum Ben Nelsons form 4, -10oF, EM, 3/4-5. Long and large leaves distinguish this form. Indumentum occurs along the mid vein on the leaf underside. Silvery tomentum dusts the leaves and stems of new growth for many weeks. Glossy green leaf surfaces are exposed after the tomentum is worn away. R. pseudochrysanthums unusual rigid leaves are recurved along the leaf margin. 30-36"
20233 Rhododendron racemosum (RN, rn, Scabrifolia) 2-5, -5oF, E-EM, 4/3. Find a sunny spot for this pert plant and you will discover yourself smiling at it every season of the year. It will grow many erect red stems lined with glossy round leaves. Pink flower buds occur along upper portions of the stem and in multiples at stem tips. Fairly early in the flowering season, R. racemosum will appear as a bundle of clear pink plumes. 6-10"
20289 Rhododendron racemosum Tall form This upright growing form that is just great as the species is taller growing, reaching 5 after 10 years. As it gets older, it is terrific for cut flowers as it often grows stems which are up to 18" and are covered with flowers all along the stems; it doesnt hurt to cut them as it helps keep the plant in shape. A beautiful pastel pink flower and good foliage make this a desirable plant. 6-10", 10-15"
Rhododendron recurvoides (HY, hy, Glischra) 2, -10oF, EM-M, 3/5. If R. roxieanum is the Rolls Royce of rhododendrons, R. recurvoides is its equal. The foliage is long, narrow and pointed, deep green and heavily coated with indumentum, white when young, turning orange-brown with maturity. The Subsection Glischra has plants that are some of the best in the genus for foliage, and recurvoides is a star in the group. The compact trusses are white with a touch of pink. An investment that will gain in value.
20372 Rhododendron recurvoides Ben Nelson form A selection with wider, rounded foliage. 15-21"
20310 Rhododendron recurvoides Exbury form A fine form selected at Exbury Gardens. 10-15", 15-21"
20410 Rhododendron recurvoides Fishers dwarf form Same size leaves as the species, but growth habit is low and spreading forming a fairly flat-topped mound. 10-15"
20398 Rhododendron recurvoides Kingdon Ward 7184 Smaller, more rounded leaves than the species. Very similar in height and growth habit, but the smaller leaves make it look more compact. 15-21", 21-30"
20368 Rhododendron recurvoides Narrow leaf form A selection with exceptionally narrow leaves. 10-15", 15-21"
20259 Rhododendron rex (RN, rn, Falconera) 6, 5oF, EM, 3/4. Oblong oval or oblong elliptic leaves, up to 18 x 6", are shiny dark green above, with a gray, buff or brown indumentum underneath. Pale pink, rose, or white flowers, blotched and spotted crimson, are tubular, bell shaped, up to 2½" long. Held in large trusses of up to 30. A beautiful, elegant rhododendron. 10-15", 15-21"
20099 Rhododendron rex ssp. fictolacteum This plant has huge leaves, up to 12", that are deep green and have rich felt-like indumentum underneath. Large, white flowers with a purple blotch cover this plant, which eventually becomes treelike. 10-15", 15-21"
20238 Rhododendron rigidum (RN, rn, Triflora) 5, -5oF, EM, 4/3. This very beautiful plant, when in full flower, appears as a cloud of smoky pink. Wide, funnel- shaped flowers are white to pink or intense rosy lavender and occasionally spotted red. 6-10"
20399 Rhododendron rigidum Album A most beautiful white form. It produces flowers in such profusion that the plant appears to be like a floating cloud of white. 10-15"
Rhododendron roxieanum (HY, hy, Taliensia) 3, -10oF, EM, 3/5. The following are the extreme rarities of the Taliensia series that every collector wants. The foliage is long and narrow, deep green and heavily covered with cinnamon indumentum. When the foliage is new, the tomentum on the top is white and it gradually turns into shades of tan. The flowers are white with a touch of pink on the buds.
20502 Rhododendron roxieanum Branklyn Form This form is slower growing than the species with the same tremendous foliage, well indumented when young. Compact growing and white flowered. A great form of a much appreciated species. 10-15"
Rhododendron var. oreonastes This is the dwarf, alpine form of this species. Flowers are white with pink petal and bud tips. Each flower and bud has crimson spotting on the outside with heavier spotting on the inside. Leaves are narrower than the species and the growth habit is low and compact.
20135 Rhododendron var. oreonastes Rock 59589 Long, dark and light green deeply veined leaves are a perfect background for the beautiful very light pink tipped flowers with brown spotting in the white throat. Another plus is the heavy indumentum on the underside of the beautiful foliage. 10-15"
20390 Rhododendron rubiginosum (HY, hy, Heliolepida) 6, -5oF, E-EM, 3/3. Upright shrub with lance shaped leaves to 4" long are dull dark green above, brownish green underneath, and scaly on both sides. Widely funnel-shaped flowers, to 1½" long, are pink to pinkish purple, or light to deep mauve, with crimson spotting, and held in trusses of 4 to 8. 21-30"
20143 Rhododendron russatum (Rn, rn, Lapponica) 3, -15oF, EM, 4/3. Upright and open, with scaly new growth. Leaves are oval, dark green, and densely covered with rusty scales on the undersides. Royal purple to plum crimson flowers have yellow stamens. This is a desirable selection. 6-10"
20108 Rhododendron russatum Night Editor 4, -15°F, E, 3/4/3. A great selection. This named selection has interesting twisted and almost rolled leaves, quite large for this species. The flowers on this plant are a superior dark violet. 6-10", 10-15", 15-21"
20112 Rhododendron saluenense (RN, rn, Saluenensia) 18", -5oF, EM, 4/3-4. This appealing little shrub forms a small mound of many ascending stems which curve to form layers of horizontal branches. Small rounded leaves, 1-2" long, are aromatic, glossy and hairy along leaf margins, becoming shaded purple in winter. Flowers, 1-2" across, open flat, the color rosy purple to deep purplish crimson, spotted crimson, and carried in trusses of 2-5. Very variable in growth habit. 6-10"
Rhododendron sanguineum (HY, hy, Neriflora)
20391 Rhododendron sanguineum ssp. didymum 3, -10°F, L, 3-4/3-4. A broadly upright shrub with small, rigid, oblong-obovate leaves and black-crimson or dark crimson flowers. Flowers when quite young, with blooms appearing in June-July. 6-10"
20507 Rhododendron sanguineum ssp. sanguineum 3, 0°F, M, 3-4/3-4. Compact growth habit, with medium sized leaves that are matte green on the top with a thin gray-white indumentum underneath. Tubular, bell-shaped flowers are a bright crimson to scarlet, with nectar pouches, are held in loose trusses of 3-6. 6-10"
20030 Rhododendron sanguineum Rock #6 form From the famous Rock collection, this form has beautiful, dark burgundy-red flowers that look as though they could be made of velvet. Very stunning! 6-10", 10-15"
20258 Rhododendron schlippenbachii (PE, sc) 4, -25oF, E-EM, 4/3-4. A deciduous species loved by all who see it. Its upright and open with thinly textured leaves in whorls of 5 at each stem tip and it shows off its star-like, delicate pink flowers either just before or along with the leaves. The distinctive, thin foliage will not tolerate excessive sun exposure. The obovate dark green leaves turn crimson, orange or yellow in autumn. For added interest, flowers sometimes are tinged with reddish spots. 6-10", 10-15"
20260 Rhododendron schlippenbachii Sids Royal Pink 4, -25oF, E-EM, 4/4. Any form of this fine species is great, and this one is especially desirable for its flowers that are deeper pink. R. schlippenbachiis star-like, delicate pink flowers will be favored by those who like refined flowers. Thinly textured obovate leaves are whorled in groups of five at each stem tip. In a location protected from afternoon summer sun, R. schlippenbachii is a soft green, well shaped azalea. The light foliage will not tolerate excessive sun exposure. 15-21"
20303 Rhododendron sinogrande (HY, hy, Grandia) 5, 10oF, E, 4/4. As the name suggests, this is truly a "grand" plant. It is the largest leaved of all rhododendrons, magnificent to behold. Mature leaves, up to 30" long, are glossy green on the tops, layered thinly with silver-white fawn indumentum underneath. The young growth is beautiful silvery gray. Generously proportioned bell-shaped flowers, creamy white to pale yellow, blotched crimson, are held in ball trusses of up to 20 or more. A marvelous inclusion in any landscape. 10-15", 15-21"
20266 Rhododendron smirnowii (HY, hy, Pontica) 3, -15oF, ML, 3/3-4. This is an upright open growing shrub. The new growth is covered with a lovely white felt-like tomentum. Leaves, to 6" long, oblong or lance shaped, the edges bent downward, are smooth dark green on top, indumented with a tawny colored, thick, woolly cover underneath. Frilled funnel, bell-shaped flowers, to almost 2" long, are pale to deep rosy purple, and are carried in loose trusses of 10-12. Nice! 6-10", 10-15"
sphaeroblastum (HY, hy, Taliensia) 4, -5oF, EM,
3/4. Young growth on this plant is smooth and hairless, either greenish
or purple. Leaves are oval or oblong oval, hairless olive green on top,
with a heavy, woolly, rust indumentum underneath. Emerging from buds
that have a rosy blush, funnel, bell-shaped flowers are white, spotted
crimson, in trusses up to 12. 10-15", 15-21", 21-30"
20508 Rhododendron spinuliferum (RN, rn, Scabrifolia) 4,5oF, EM, 3-4/4. This unusual species has terrific heavily veined or puckered leaves. The glossy topped leaves are a great contrast to the lightly hairy undersides and hairy stems. The pink to red flowers are tubular with protruding stamens and style, only 1 in length. Like a fistful of firecrackers these flowers are held upright in the truss. A very interesting plant, a conversation piece! 10-15", 15-21"
20523 Rhododendron stenopetalum Linnearifolium (TT, tt) 2, 5oF, EM, 4/4. If you want something different, try this. The leaves are up to 3" long and ½" wide. The flowers are pink and have very interesting narrow linear petals like the foliage. 6-10"
20270 Rhododendron strigillosum (HY, hy, Maculifera) 4, 5oF, E, 5/4. Splashing deep blood red flowers appear early in the spring on top of long slender leaves which are heavily coated with stiff bristles. Midrib on the underside of the leaf is heavily coated with indumentum. The bristles on the new foliage are red, a display all its own. Most beautiful. 10-15"
20271 Rhododendron sutchuenense (HY, hy, Fortunea) 5, -10oF, VE, 4/3. A hardy, early blooming rhododendron. It will flower between February and April, depending on its location. Heavy exposed boughs form a handsome, wide spreading and open shape. Long slender leaves grace this formal rhododendron. R. sutchuenenses lightly textured flowers are clear pink with a purple blotch. 10-15", 15-21"
20153 Rhododendron sutchuenense var. geraldii A hardy early blooming rhododendron, this is tree like with large leaves to 12" long, dark green on top, paler underneath. Lightly textured, bell-shaped flowers are clear pink with a prominent purple blotch. 15-21"
20160 Rhododendron taliense (HY, hy, Taliensia) 5, -5oF, EM, 3/3. A warm coat of buff colored indumentum covers the undersides of this lovely foliage. Flowers are creamy yellow or cream blushed rose with intense crimson markings. One of the most beautiful species to be found. 21-30"
20426 Rhododendron temenium (HY, hy, Neriiflora) 18", -5oF, EM-M, 3/2-4/-. Growth habit is very compact in this highly variable species. Leaves to 3", are oblong to oblong-oval, usually hairless on both sides. Flowers to 1-2", are tubular-bell-shaped and are of great substance. Colors range from red or scarlet to deep crimson or purple crimson. 6-10", 10-15"
20226 Rhododendron thayerianum (RN, rn, Argyophylla) 5, 0oF, VL, 3/3-4. Compact upright growth habit with leaves clustered closely around trusses. Large leaves are oblong, glabrous light green on top, the reverse with very thin buff-colored indumentum. Flowers are funnel and bell-shaped, white tinged pink or pink, held in compact trusses from 10-20. A beautiful rhododendron, especially valued for its late flowering. 15-21"
20276 Rhododendron thomsonii (HY, hy, Thomsonia) 5, 5oF, EM, 3-4/3. Blood red flowers top the round deep green leaves. Peeling red bark on older plants is attractive. From Sikkim. 10-15"
Rhododendron tomentosum (RN, rn, Ledum) 3, 0oF, M, 3/3. Native to western North America, this rounded shrub needs a cool garden location. It has oval to ovate,dark green leaves above and whitish beneath. The flowers are small white terminal clusters.
20546 Rhododendron tomentosum Milky Way A selection from the RSF that flowers very heavily. 6-10"
Rhododendron traillianum (HY, hy, Taliensia) 5, -5oF, EM, 3/3-4. Mature leaves may reach 7" are oblong and dark green on the top with a fawn indumentum on the underside. Flowers are bell-shaped and are carried in trusses of 15. The blooms range in color from rose to light or dark purple, and have a paler blotch.
20524 Rhododendron traillianum var. dictyotum 4, 0oF, M, 3-4/3. Medium green foliage is smooth on top, thinly layered with a rusty brownish indumentum underneath. Held in trusses of 8-15, bell shaped flowers, to 2" long, are white with a crimson blotch and crimson spots. 10-15", 15-21"
20277 Rhododendron trichanthum (RN, rn, Triflora) 4, 0oF, L, 2-3/3. This species is one of the latest flowering members of the subsection Triflora. Blue-purple flowers are found amid soft bristly covered leaves and stems. 15-21"
20279 Rhododendron trichostomum (RN, po) 30", 0oF, M, 4/3. Numerous small, uniquely shaped tubular flowers will last for a month. The succulent flowers are a clear light pink, resembling the flowers of daphne more than rhododendron. A sunny location has proven to be best. 10-15", 15-21"
20515 Rhododendron trichostomum var. ledoides Rae Berry An lovely selection of the species with softer pink flowers in a tighter ball truss. 6-10"
20371 Rhododendron tsariense (HY, hy, Lanata) 3, 0oF, E, 3/5. This rhododendron is grown for it tremendous cinnamon indumentum. If this never flowered, it should be grown. Its flower are pale pink to white flushed pink and are spotted with crimson. Difficult to propagate, and almost impossible to obtain, it is regal species for the connoisseur. 6-10"
20474 Rhododendron uvarifolium var uvarifolium (HY, hy, Fulva) 4, 5oF, E, 3/3-4. Treelike growth habit with oblong dark green leaves to 10" and a light indumentum below. Bell-shaped flowers from white to white-flushed-rose or pale rose that are sometimes blotched with crimson and held in tight rounded trusses. 10-15", 15-21"
20331 Rhododendron viscosum (PE, pe, Pentaphyllum) 5, -5oF, VL, 2-3/3. This deciduous shrub has a tall, upright growth habit with reddish brown new growth and stiff, flat hairs. Lance shaped leaves, 3½" x 2½", toothed on the edges are glabrous on both sides when mature. Funnel-shaped flowers, up to 1½" are white flushed with pale violet red. 15-21", 21-30"
20366 Rhododendron wallichii (HY, hy, Campanulata) 4, -10oF, EM, 2-3/3. Very closely related to R. campanulatum except with a conspicuous absence of indumentum. The flowers are a soft lilac with rose spotting. 10-15"
20107 Rhododendron wardii (HY, hy, Campylocarpa) 4, 0oF, M, 4/3-4. Growth habit is open and upright. The leaves to about 4" long, are rounded oval, the tops dark green and non-hairy, underside paler and glaucous. Flowers to 2-3" long, are bowl or cup-shaped, clear lemon to bright yellow, occasionally flushed with green or with a crimson basal blotch, in loose trusses of 7-14 individual blossoms. 15-21"
20280 Rhododendron wasonii (HY, hy, Taliensia) 4, -5oF, EM, 3/3-4. Young foliage buds on this shrub are densely clothed on top with a pale grayish buff tomentum. Leaves, to 4" long, are oval-shaped, dark shiny green and almost hairless on top, layered with thick dark brown or rust colored indumentum underneath. Carried in loose trusses of 6-10, the bell-shaped flowers to 1½" long range from white to creamy white, pink, rose, or yellow and sometimes spotted crimson. 3-6" 10-15"
20317 Rhododendron wightii (HY, hy, Taliensia) 5, 5oF, EM, 3/2-3. This plant has an open, tree like growth habit. The 8" long leaves are oblong, lance shaped, bright green above and have fawn or reddish brown felt-like indumentum below. Bell-shaped, pale to lemon yellow flowers can occasionally be white with a crimson blotch or spots. 21-30"
20283 Rhododendron williamsianum (HY, hy, Williamsia) 18", -5oF, EM, 3/4. Regarded as one of the loveliest in the genus, grows in a perfectly rounded shape, and has delicate, dainty little bell-shaped flowers hanging like fairy lanterns amidst the dense foliage. This dwarf species is compact, tight and low spreading, not usual for this series. New growth is a lively bronze. Blooming in various shades of pink, the flowers are up to 2" long and held in loose trusses of 2-3. 10-15", 15-21"
20124 Rhododendron williamsianum Bovee 10-15"
20554 Rhododendron williamsianum Lancaster Dwarf 6-10"
20281 Rhododendron wiltonii (HY, hy, Taliensia) 3, -5oF, EM, 3/4. Young growth on this shrub is clothed with greenish white felt. Leaves, to 5" long, are oblong, lance-shaped or oblong obovate; the tops shiny, wrinkled, and hairless; the undersides are indumented with fawn or brown. Bell-shaped flowers, are white or white blushed pink, spotted and blotched crimson, and held in trusses of up to 10. 6-10", 10-15", 15-21"
20117 Rhododendron yungningense (RN, rn, Lapponica) 2, -15oF, EM, 3/3. A dwarf shrub, with an open, upright habit and densely scaled new growth. Tiny leaves are oblong lance-shaped and rust colored on the undersides. Funnel-shaped flowers range in color from pale rose-purple to deep purple. 6-10"
20269 Rhododendron yunnanense (RN, rn, Triflora) 6, 0°F, EM-M, 4/2-3/3-4. This extremely variable species flowers freely both at the ends and amongst the 4" oblanceolate to lanceolate bright green scaly leaves in trusses of 3-5. The 1½" funnel shaped flowers range from white to pink and rosy lavendar, sometimes even spotted or blotched crimson. 6-10", 10-15", 15-21", 21-30"
20543 Rhododendron zaleucum var. zaleucum (RN, rn, Triflora) 6, 5°F, E, 3/3. Flowers are in clusters of 3-5, either at the ends or along the upper part of branches between the leaves. The 1 1/2" blooms are widely funnel-shaped, pale purple, rose, yellow or white, occasionally spotted crimson. 6-10"
20555 Rhododendron zaleucum var. zaleucum KR#2687 6-10"