Overview

Comprehensive Description

Nomenclatural History

 

R. youngae Fang, Contr. biol. Lab. Sci. Soc. China, Bot. ser. 12: 24 (1939). Type: China, Sichuan, Nan-Chuan-hsien, Kin shan, 2000m, 13 iv 1930, Chang 59 (holo. SZ; iso. E, Hb. Inst. Bot. Guangzhou). R. simiarum Hance subsp. youngae (Fang) Chamberlain, Notes R.B.G. Edinb. 37:329(1979)

 
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Distribution

 

China (E Sichuan, Hubei)

 
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Distribution

Chongqing, W Hubei.
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Physical Description

Morphology

Description

Shrubs, evergreen, 2–3 m tall; bark gray; young shoots with a dense grayish tomentum and a few glandular hairs. Petiole 10–15 mm; leaf blade leathery, obovate-elliptic or long-obovate, 6–13 × 2–4 cm; base cuneate; apex acuminate, shortly curved-cuspidate; abaxial surface indumentum grayish to pale fawn; adaxial surface glabrous when mature; midrib prominent abaxially, grooved adaxially; lateral veins 10–12-paired, inconspicuous. Inflorescence a lax racemose corymb, 4–8-flowered; rachis 10–15 mm, with a fawn-tomentum. Pedicel 1–2.5 cm, with glandular hairs; calyx lobes 5, 3–5 mm, membranous glandular on the back, triangular-ovate, margin glandular-ciliate; corolla funnel-campanulate, pale rose, usually crimson-spotted, 4–4.5 cm, puberulent within at the base, outside glabrous, lobes 5, orbicular, ca. 1.5 × 2 cm; stamens 10, unequal, 1.5–3 cm, filaments densely hairy in lower 1/4; ovary ovoid, ca. 5 mm, ca. 5–6-locular, densely clad with long-glandular hairs; style slender, glabrous. Capsule oblong-cylindric, ca. 15 × 7 mm, glandular. Fl. Apr–May, fr. Jul–Aug.
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Diagnostic Description

 

Shrub, up to 3m; young shoots densely tomentose, with a few stalked glands. Leaves coriaceous, obianceolate, 9-16 x 2.5-4cm, 2.6-4.5 x as long as broad, apex acuminate to shortly cuspidate, glabrous above when mature, with a dense, felted, grey to fawn indumentum beneath; petioles c.3cm, tomentose. Inflorescence lax, 6-8-flowered; rhachis 10-15mm; pedicels 30-40mm, long-stipitate-glandular. Calyx 3-6(-15)mm, lobes ligulate, membranous, gland-ular-ciliate. Corolla funnel-campanulate, pale rose, 42-50mm. Ovary densely fulvous long-stipitate-glandular; style glabrous. Capsule c.15 x 7mm, cylindrical.

 
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Ecology

Habitat

Thickets, mountain slopes, roadsides; 1000–2200 m.
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Thin woods

 
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Rhododendron adenopodum

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Rhododendron adenopodum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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