Overview

Comprehensive Description

Nomenclatural History

 

R. glischrum var. adenosum Cowan & Davidian, Notes R.B.G. Edinb. 21: 147 (1953). Type: China, SW Sichuan, mountains of Kulu, 3540m, ix 1929, Rock 18228 (= Rock seed no. 3837, cult. E) (holo. E). R. kuluense Chamberlain, Notes R.B.G. Edinb. 36: 116 (1978)

 
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Distribution

SW Sichuan (Muli).
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Physical Description

Morphology

Description

Shrubs; young shoots densely glandular-setose. Petiole densely glandular-setose; leaf blade leathery, ovate to lanceolate or elliptic, 7–10.5 × 2.4–3.4 cm; margin cartilaginous, papillate; apex acute to acuminate; abaxial surface setose and sparsely tomentose, tomentum quickly lost at least towards apex, or persistent, midrib densely glandular-setose; adaxial surface with a few setae on midrib, glabrous when mature. Inflorescence lax, 6–8-flowered; rachis ca. 5 mm. Pedicel 1.5–2.5 cm, densely glandular-setose; calyx ca. 7 mm, densely glandular-setose; corolla funnel-campanulate, pale pink with purple flecks, 3.5–5 cm; ovary densely glandular-setose; style glabrous. Capsule curved, ca. 20 × 4 mm.
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Diagnostic Description

 

Shrub; young shoots densely setose-glandular. Leaves ovate to lanceolate or elliptic, coriaceous, 7-10.5 x 2.4-3.4cm, c.3 x as long as broad, apex acute to acuminate, base rounded, margin cartilaginous, papillate, upper surface glabrous when mature, with a few setae overlying the midrib, lower surface setose and sparsely tomentose, tomentum evanescent, at least towards apex, or ± persistent; petioles, like midribs, densely glandular-setose. Inflorescence lax, 6—8-flowered; rhachis c.5mm; pedicels 15-25mm, densely glandular-setose. Calyx c.7mm, densely glandular-setose. Corolla (in cultivation) funnel-campanulate, pale pink with purple flecks, 35-50mm. Ovary densely glandular setose; style glabrous. Capsule c.20 x 4mm, curved. china (SW Sichuan-Muli). Spruce forests,

 
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Type Information

Isotype for Rhododendron glischrum var. adenosum Cowan & Davidian
Catalog Number: US 1510637
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): J. F. Rock
Year Collected: 1929
Locality: Mts.of Kulu; alt. 3540 m., Szechwan, China, Asia-Temperate
Elevation (m): 3540 to 3540
  • Isotype: Cowan, J. M. & Davidian, H. H. 1953. Notes Roy. Bot. Gard. Edinburgh. 21: 147.
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Ecology

Habitat

Picea forests; 3300–3600 m.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Rhododendron adenosum

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 adenosum

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

Comments

In the protologue of Rhododendron adenosum the earlier name R. glischrum var. adenosum (based on the same type: J. F. C. Rock 18228) was cited, but without a full bibliographic reference. Rhododendron adenosum was nevertheless validly published as a new combination under Art. 33.2 of the Saint Louis Code because otherwise it would be validly published as the name of a new taxon. The name R. kuluense was published as a nomen novum for R. glischrum var. adenosum, but slightly later in 1978 (18 May) than was R. adenosum (before 16 May); R. kuluense is therefore illegitimate under Art. 52.1 because it was nomenclaturally superfluous when published.
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