Prev Taxon: Genus Dendrobium section Fugacia
Current Genus: Genus Dendrobium Section Grastidium
Next Taxon: Genus Dendrobium section Herpetophytum
Dendrobium misoanum
Dendrobium misoanum Ormerod, Checkl. Papuasian Orch. (2017) 229, 485 (fig.).
Type: Reeve 741 (holo AMES; iso: CANB, E, K, L, LAE, NSW, UPNG).
Synonyms:
Epiphytes. herbaceous. Roots and rhizome not seen. Stem slender, subterete, laxly leafy, to 100 by 0.12 cm (collected fragment 14-23 cm long); branches few, short, 5.5-6.0 cm long; exposed part of internodes 0.7-1.5 cm long. Leaves linear-lanceolate, thin, 2.25-8 by 0.175-0.25 cm; leaf sheaths tubular, smooth, striate, its apex with a triangular, 0.15-0.2 cm long lobe with acute apex; apex with 2 minute obtuse lobes differing 0.1-0.2 cm in length. Inflorescence 2-flowered; peduncle c. 0.4 cm long; basal inflorescence scales: 1st transversely elliptic, 0.1-0.15 by 0.18-0.2 cm, 2nd oblong, gently upcurved, 0.5-0.6 by 0.2 cm, with obtuse apex; 3rd linear, thin, papery, c. 0.3 cm long, with acute apex. Pedicel and ovary terete, club-shaped, 0.8 cm long. Median sepal ligulate-lanceolate in basal half, upper half linear, 3.7 by 0.42 cm; apex acut; 5-nerved. Lateral sepals obliquely ovate-oblong in basal half, upper half linear-lanceolate, 3.8 by 0.7 cm mentum incurved, c. 0.6 cm long, with obtuse apex. Petals linear-ligulate, 3.3 by 0.15 cm; with acute apex; 5-nerved. Lip 3-lobed. 1.1 cm long; hypochile c. 0.4 by 0.48-0.5 cm, inside on each side with a line of broken lamellate projections, keel plate-like, high, on the claws of the epichile gradually lowering, ending in a line of broken, acute to 2-lobed lamellae on the basal third of the epichile, the lateral lobes narrowly lanceolate, 0.27-0.3 cm long, with acute apex; epichile c.0.7 by 0.57 cm, claw short, blade triangular-ovate from a dilated base, the margins irregular to lacerate, above on the 3 main nerves with long hairs-like projections, with acuminate apex. Column semi-terete, slender, 0.4 cm long (0.33 cm without anther), upper margin on each side with a small obtuse lobule; column foot incurved, c. 0.6 cm long, inside median with an obovoid protuberance.
(after Ormerod, 2017)).
Leaves sometimes drying purple. Flowers creamy white, red on the lateral sepals and column foot; lip white.
Not recorded. Altitude 2300 m.
Distribution: Malesia, Papua New Guinea, endemic.
Papua New Guinea (Enga Prov.).
Cool growing epiphyte.
August.
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Dendrobiinae
- Genus Dendrobium
- Section Grastidium
- Species Dendrobium Dendrobium misoanum
Dendrobium misoanum Ormerod is very similar to Dendrobium dockrillii Ormerod but differs in having 1 median keel (versus 3 keels), and 3 well separated lines of long hair-like projections on the 3 main nerves of the epichile (versus a dense oblong band of hairs median on the epichile).
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Dendrobium misoanum
Dendrobium misoanum Ormerod, drawing by Paul Ormerod, in Checkl. Papuasian Orch. (2017) 229, 485 (fig.).