Prev Taxon: Genus Dendrobium section Fugacia
Current Genus: Genus Dendrobium Section Grastidium
Next Taxon: Genus Dendrobium section Herpetophytum
Dendrobium hentyanum
Dendrobium hentyanum Ormerod, Checkl. Papuasian Orch. (2017) 208, 479 (fig.).
Type: NGF 20933 (Henty) (holo A; iso BRI, CANB, L, LAE).
Synonyms:
Epiphytes. Roots and rhizome not seen. Stem slender, compressed elliptic in section, laxly leafy, to 90 by 0.3 cm , 0.15-0.20 cm thick. (holotype fragment c. 24 cm long). Leaves lanceolate, 10-10.2 by 1.1-1.3 cm; leaf sheaths tubular, striate, minutely sparsely verruculose, towards the apex minutely transversely rugulose, 1.8-2.2 cm long, at the apex with an ovate-triangular, acute, c. 0.4 cm long lobe; apex with 2 minute subacute lobes differing 0.05-0.1 cm in length; prominently 7-nerved. Inflorescence 2-flowered, emerging halfway through the leaf sheath; peduncle 2 cm long; basal inflorescence scales: 1st transversely oblong, 0.25-0.35 by 0.45 cm, 2nd oblong, 1.25-1.4 by 0.45 cm with obtuse apex. Pedicel and ovary narrowly club-shaped, 1.4 cm long. Median sepal linear-lanceolate; apex subacute; 7-nerved, 6 by 0.45 cm. Lateral sepals obliquely linear-lanceolate, 0.415 by 0.6 cm; apex subacute; 7-nerved; mentum obtuse, 0.4 cm long. Petals in lower halfligulate-rhombic, upper half linear, 3.9-4 by 0.45 cm ; 5-nerved. Lip 3-lobed, c. 0.9 cm long; hypochile 0.4 by 0.6 cm, inside laxly scattered with triangular to subulate projections, lateral lobes oblong, 0.25 cm long (inside edge), with obtuse apex; epichile ovate, 0.5 by 0.35 cm, the basal margins lacerate, further irregularly dentate, upper surface with a dense central patch of pubescence, with acute apex; keel club-shaped, thick and fleshy, in section obcuneate, terminating below the apex of the hypochile. Column stout, obliquely conical, 0.32 cm long (or 0.27 cm without anther); column foot at right angle to slightly obtuse angle to the ovary, 0.3 cm long.
(after Ormerod, 2017)).
Leaves drying dark olive-green; leaf sheaths drying light to dark brown. Flower white with yellow tips.
Epiphyte on moss covered root in upper montane rainforest. Altitude 21350 m.
Malesia (New Guinea, endemic).
Papua New Guinea (Sandaun Prov.). See map
Cool growing epiphyte.
January.
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Dendrobiinae
- Genus Dendrobium
- Section Grastidium
- Species Dendrobium hentyanum
Dendrobium hentyanum Ormerod is similar to D. pantherinum Schltr., but differs in the absence of spots on the flowers, and the ovate, acute midlobe (versus oblong, retuse) with a smaller patch of pubescence.
Dendrobium hentyanum Ormerod is named after Ted Henty (1915-2002), collector of the type (see the CHAH website for an excellent biographical sketch of Ted and his life in PNG).
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Dendrobium hentyanum
Dendrobium hentyanum Ormerod, drawing by Paul Ormerod in Checkl. Papuasian Orch. (2017) 208, 479 (fig.), based on the holotype NGF 20933.