Prev Taxon: Genus Dendrobium section Fugacia
Current Genus: Genus Dendrobium Section Grastidium
Next Taxon: Genus Dendrobium section Herpetophytum
Dendrobium lanuginosum
Dendrobium lanuginosum Ormerod, Orchadian 15 (2005) 12, fig.
Type: Brass 13450 (holo AMES!).
Synonyms:
Epiphytic herb. Stem rigid, terete, profusely branching near apex, primary stem to 160 by 0.25 cm; branchlets to 9 cm long; internodes to 4.1 cm long. Leaves semirigid, narrowly lanceolate, 2- 3 by 0.15-0.3 cm; leaf sheaths striate; apex unequally bidentate. Inflorescence 2-flowered; peduncle 0.5 cm long; peduncle scales semicircular, 0.1 cm long. Pedicel and ovary apically slightly widened, terete, 1.7 cm long. Flowers glabrous. Median sepal oblong-lanceolate, 2.1 by 0.5-0.6 cm; apex subobtuse. Lateral sepaIs obliquely ovate-elliptic, 2 by 0.9 cm; apex acute, on outside near apex keeled; mentum 0.6 cm long. Petals oblong-elliptic, 1.9 by 0.6 cm; apex subobtuse. Lip 3-lobed, 1.4-1.5 by c. 1.2 cm; hypochile 0.8 by c. 1.2 cm, with a single thick truncate median keel 0.8 m long, free part of lateral lobes obliquely oblong-elliptic with obtuse apex, inner margins minutely irregularly erose, inner surface sparsely, finely and shortly pubescent; epichile shallowly concave, suborbicular, 0.6 by 0.6 cm, with bidentate apex, margins serrate in lower half and becoming erose toward the apex, median with a dense and finely woolly band of pubescence, near the apex glabrous. Column subconical, 0.35 cm long; column foot 0.6 cm long; stelidia bidentate.
(after Ormerod 2005)
Flowers white with a brownish-white lip.
Riveri valley forest, Altitude 850 m.
Malesia (New Guinea).
Indonesia (Papua Province, Sarmi Regency).
Warm growing epiphyte.
Narch.
Dendrobium lanuginosum Ormerod shares the dense branching of the stems near the apex with Dendrobium juniperinum Schltr. of the same section and with some species of Glomera Blume and Glossorhyncha Ridl., but differs in its 3x longer stem, the flowers being 2x as long, and in the lip which has oblong-elliptic (not triangular) lateral lobes.
The collection Eyma 4804 from near the Wissel Lakes area at c. 3000 m closely resembles D. lanuginosum, but is in bud and can not unequivocally be identifiedas such.
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Dendrobium lanuginosum
Dendrobium lanuginosum Ormerod. Drawing by Paul Ormerod in Orchadian 15 (2005) 12, fig., based ton the type: Brass 13450