Rhododendron vaseyi

A. Gray

Proc. Amer. Acad. Arts 15: 48. 1879 ,.

Common names: Pink-shell azalea
Endemic
Synonyms: Azalea vaseyi (A. Gray) Rehder Biltia vaseyi (A. Gray) Small
Treatment appears in FNA Volume 8. Treatment on page 465. Mentioned on page 455, 457, 464.

Shrubs, to 2.5 (–5.5) m, rhizomatous. Stems: bark smooth to vertically furrowed, shredding; twigs sparsely to moderately scattered, multicellular stipitate-glandular-hairy and eglandular-hairy (hairs unbranched), also unicellular-hairy, glabrate in age. Leaves deciduous; petiole multicellular eglandular and stipitate-glandular-hairy and unicellular-hairy; blade elliptic to obovate, 2.3–17 × 0.8–5.5 cm, thin, membranous, margins entire or undulate, plane, widely scattered to densely eglandular-hairy, apex acuminate, abaxial surface scattered stipitate-glandular-hairy, adaxial surface scattered stipitate-glandular-hairy and eglandular-hairy, especially near margins. Floral bud-scales glabrous or nearly so abaxially, stipitate-glandular-hairy, often also unicellular-hairy along margins. Inflorescences 5–15-flowered; bracts similar to bud-scales. Pedicels 5–26 mm, stipitate-glandular-hairy. Flowers opening before development of leaves, erect to horizontal, fragrant; calyx lobes 0.3–8.5 mm, glandular-ciliate, often also scattered, stipitate-glandular-hairy; corolla pale to deep pink, sometimes white, with orangebrown or red spots on upper lobes, widely campanulate and appearing ± 2-lipped due to more extensive connation of 3 upper lobes and 2 flaring, slightly longer lower lobes, 18–37 mm, glabrous on outer surface, petals connate, upper lobe 10–18 mm, lateral lobes 14–24 mm, lower lobes 15–30 mm, tube gradually expanding into lobes, 3–8 mm (to 1/4 as long as lobes); stamens (5–) 7, not or only slightly exserted, ± unequal, 12–38 mm; filaments glabrous. Capsules borne on erect pedicels, 9–17 × 3–6 mm, very sparsely to moderately multicellular stipitate-glandular-hairy. Seeds with ± stellate-globular tails; testa tightly appressed. 2n = 26.


Phenology: Flowering spring.
Habitat: Montane bogs, rocky summits, heath balds, steep slopes in deciduous or coniferous forests
Elevation: 900-1800 m

Discussion

Rhododendron vaseyi is widely cultivated because of its beautiful flowers.

Selected References

None.

Lower Taxa

None.

... more about "Rhododendron vaseyi"
stipitate-glandular-hairy +
eglandular-hairy +  and stipitate-glandular-hairy +
Walter S. Judd +  and Kathleen A. Kron +
A. Gray +
smooth +  and vertically furrowed +
not flaky +
2.3 cm23 mm <br />0.023 m <br /> (17 cm170 mm <br />0.17 m <br />) +
elliptic;obovate +
membranous +
thin;0.8cm;5.5cm +
scale-like +
stipitate-glandular-hairy +  and glandular-ciliate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
multicellular +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
stipitate-glandular-hairy +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Pink-shell azalea +
white +, pale +  and deep pink +
rotate to crateriform campanulate cylindric globose or urceolate +
extensive +
900-1800 m +
undifferentiated +
fusiform +
unicellular-hairy +, stipitate-glandular-hairy +, nearly +  and glabrous +
erect;horizontal +
fragrant +
pendulous +  and erect +
usually ovoid;cylindric +
Montane bogs, rocky summits, heath balds, steep slopes in deciduous or coniferous forests +
multicellular +
terminal +  and axillary +
1.4 cm14 mm <br />0.014 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
deciduous +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
eglandular-hairy +
plane;undulate;entire +
parietal +, axile +  and placentation +
tenuinucellate +  and unitegmic +
stipitate-glandular-hairy +
0.5 cm5 mm <br />0.005 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
scale-like +
reduced +
not sticky +
eglandular +  and multicellular +
unicellular-hairy +  and stipitate-glandular-hairy +
Flowering spring. +
4-5-carpellate +
Proc. Amer. Acad. Arts +
distinct +
tailed +, flattened-ellipsoidal +  and fusiform +
unequal +
procumbent +  and prostrate +
creeping +  and sprawling +
peltate +  and capitate +
straight +
Azalea vaseyi +  and Biltia vaseyi +
stellate-globular +
Rhododendron vaseyi +
Rhododendron +
species +
expanding +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
multicellular +
glabrate +, unicellular-hairy +, eglandular-hairy +  and stipitate-glandular-hairy +
red spots +  and orangebrown +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
evergreen +, deciduous +  and perennial +
heterotrophic +, autotrophic +  and mycotrophic +