Species Information - Dendrobium brevitepalum

Dendrobium brevitepalum De Vogel in De Vogel, E.F., van Vugt, R. & Hoogenfdijk, E.A.H., Dendrobium section Diplocaulobium subsection Goniobulbon (Orchidaceae) 1: The Species with 4 or 5 Keels on the Epichile, Malesian Orchid Journal Vol. 22 (2018): 87, fig. 5

Type: McKee 2170 (holo L)

Synonyms:

Roots and rhizome not seen. Pseudobulbs size not known (only partly collected), rather slender, tapering to the top; 6-ribbed. Leaves oblong, c. 3.5 by 0.7 cm, index c. 5; base narrowed; apex with acute lobules; thin-coriaceous, slightly stiff. Inflorescences 1 per pseudobulb, developing in succession, c. 2 cm long; peduncle c. 0.6 cm long, shorter than the spathe; spathe 0.8 cm long. Pedicel and ovary c. 1.1 cm long; pedicel with 3 thin wings and 3 low ribs; ovary with 6 thin wings. Flower c. 1.5 cm across. Median sepal narrowly triangular, narrowed below the middle, c. 0.75 by c. 0.35 cm; apex somewhat thickened, acute; 5-nerved; somewhat convex. Lateral sepals obliquely narrowly triangular, widest at the base, c. 0.9 by 0.55 cm; apex somewhat thickened, acute; 5-nerved; somewhat convex; mentum conical, obtuse, c. 0.5 cm long. Petals narrowly linear, c. 0.7 by 0.08 cm; top half semi-tubular; apex thickened, acute; at the base 3-nerved. Lip oblong-ligulate, when flattened c. 0.85–0.9 cm long; 5-keeled; hypochile when flattened in outline obovate, c. 0.55 by 0.35 cm; lateral lobes in front projecting, acute; keels 2, parallel, thin plate-like with a slightly swollen crest, in top 1/4 of the hypochile somewhat conniving, continuing as lower, thin, plate- like, undulating keels (c. 4 curves) up to 1/4 of the top of the epichile; epichile ovate, c. 0.3–0.4 by 0.25–0.3 cm; top acute; median with an undulating third keel (3 curves); below at the top keeled. Column in lateral view c. rectangular, with swollen front margins, 0.13 × 0.7 cm; clinandrium 3-lobulate, the lateral lobes acute, the median lobe long subulate, c. 0.05 cm long; column-foot gently curved, in natural position c. 0.5 cm long Anther c. triangular-cucullate, c. 0.08 by 0.1 cm; apex truncate.
(After De Vogel in De Vogel, Vugt & Hoogendijk 2018)

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