Species Information - Dendrobium hosei

Dendrobium hosei Ridl., Trans. Linn. Soc. London, Bot. 3 (1893) 363.

Type: Ridley s.n. (Malay Peninsula, Tahan R.) (SING); Hose s.n. (Sarawak).

Synonyms:

• Dendrobium hosei Ridl. var. pelor Carr, Gard. Bull. Straits Settlem. 5 (1929) 125, pl. 1, fig. 5.
  - Type: Ridley s.n. (Malay Peninsula, Tahan R.) (SING); Hose s.n. (Sarawak).
• Dendrobium pluricostatum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 557; 21 (1923) t. 187, fig. 702.
  - Type: Schlechter 19269 (holo B, lost; iso AMES, BO, E, G, K, L, NSW).
• Distichorchis pluricostata (Schltr.) M.A.Clem., Telopea 10, 1 (2003) 282

Rhizome very short, roots elongated, filiform, flexuose, glabrous. Stems crowded, erect or patent, slender, rather fleshy, slightly flexuose, up to 50 cm by 3-4.5 mm, many-leaved. Leaf sheaths entirely covering the stem. Leaves erect-patent, linear-lanceolate, 6-10 by 0.5-0.8 cm, apex subacute, strongly unequally and obliquely bilobulate, subcoriaceous. Inflorescences 1-flowered; peduncle 0.7-1 cm long, scales few, very small. Floral bract elliptic, much shorter than the pedicel and ovary, apex obtuse, glabrous. Pedicel and ovary 0.7 cm long, subclavate, glabrous. Flower resupinated, c. 1.5 cm across. Dorsal sepal ovate, 0.7 cm long, apex apiculate. Lateral sepals obliquely ovate, widened at the base, 0.7 cm long, apex apiculate; mentum conical, 0.4 cm long, obtuse. Petals obliquely ligulate-oblong, 0.6 cm long, apex obtuse. Lip 3-lobed in the middle, 1.1 by 1 cm, with a short narrow claw at the base, sparsely subverrucose in basal half, lateral lobes falcate-triangular, short, acute; midlobe with a very short claw, reniform, 0.35 by 0.65 cm, with 15 crests which become lower and shorter towards the lateral margins, apex retuse, apiculate. Column short, clinandrium 3-lobulate; lateral lobules rounded, short, the median triangular, denticulate; column-foot 0.4 cm long, gradually narrowing towards the apex.
(largely after Schlechter, 1912, as Dendrobium pluricostatum).

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