Overview

Comprehensive Description

Distribution

 

China (NE Yunnan)

 
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Distribution

Localities documented in Tropicos sources

Rhododendron aberconwayi Cowan:
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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NC Yunnan.
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Physical Description

Morphology

Description

Shrubs, 1.5–2.5 m tall; older branches glabrous; branches slender; young shoots puberulent and glandular. Petiole cylindric, 5–10 mm, sparsely tomentose; leaf blade thick, leathery, ovate-elliptic or ovate-lanceolate, 2.5–5 × 1–1.8 cm; base broadly cuneate or rounded; margin strongly revolute; apex acute; abaxial surface pale, with red punctate hair bases on veins; adaxial surface smooth, glabrous, midrib slightly raised abaxially, grooved adaxially; lateral veins 8–9-paired. Inflorescence racemose-umbellate, 7–11-flowered; rachis stout, 10–25 mm, densely tomentose, eglandular. Pedicel 1.5–3.5 cm, glandular-hairy; calyx discoid; lobes 5, ca. 1 mm; sparsely hairy, glandular-ciliate; corolla open-cup- or saucer-shaped, white or pink with purple flecks, 2–3 cm, without nectar pouches; lobes 5, orbicular, ca. 1.3 × 1.5 cm, emarginate; stamens 10, unequal, 1–1.5 cm, filaments glabrous; ovary conoid, ca. 4 × 2 mm, 9- or 10-locular; style ca. 1.3 cm, glandular-hairy to tip. Capsule 18–2 × ca. 10 mm. Fl. May, fr. Oct.
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Diagnostic Description

 

Shrub, 1.5-2.5m. Leaves elliptic, thick and coriaceous, 3-6 x 1.1-2.2cm, c.3 x as long as broad, apex acute, base cuneate, margin strongly recurved, not undulate, glabrous when mature, with red punctate hair bases overlying the veins beneath; petioles 0.5-lcm, papillate. Inflorescence 6—12-flowered, dense; rhachis c.5mm; pedicels 20—30mm, sparsely hairy and stipitate-glandular. Calyx c.lmm, sparsely hairy, glandular-ciliate. Corolla open-campanulate, lacking nectar pouches, glabrous within, white to pale rose, with purple flecks, 28-35mm. Ovary and style glandular throughout. Capsule 18-20 x c.8mm.

 
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Type Information

Isotype for Rhododendron aberconwayi Cowan
Catalog Number: US 2971944
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): -. McLeren
Locality: So. Shuich Mt. summit., Yunnan, China, Asia-Temperate
  • Isotype: Cowan, J. M. 1949. Roy. Hort. Soc. Rhododendron Year Book. 3: 42.
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Ecology

Habitat

Thickets on slopes; 2200–2500 m.
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Mountain summits

 
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Rhododendron aberconwayi

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 aberconwayi

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 5
Species With Barcodes: 1
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Wikipedia

Rhododendron aberconwayi

Rhododendron aberconwayi (碟花杜鹃) is a rhododendron species native to north-central Yunnan, China, where it grows at altitudes of 2200–2500 meters. It is a shrub that grows to 1.5–2.5 m in height, with leatherly leaves that are oblong-elliptic to broadly lanceolate, 2.5–5 by 1–1.8 cm in size. Flowers are predominantly white.

Synonyms

References

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Notes

Comments

The present authors have seen no material of Rhododendron maxiongense C. Q. Zhang & D. Paterson (Novon 13: 156. 2003), described from NE Yunnan. It is very close to R. aberconwayi, but the trivial nature of the cited distinguishing features (plants lower, 0.6–0.9 m; corolla without dark flecks; stamens pilose below) suggests that the two species are conspecific.
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