Species Information - Dendrobium hansmeyerense

Dendrobium hansmeyerense Ormerod, Checkl. Papuasian Orch. (2017) 206, 477 (fig.).

Type: Sands, Pattison & .J.J Wood in Sands 2460 (holo AMES; iso K, NS W).

Synonyms:

Roots and rhizome not seen. Stem fragment slender, compressed elliptic in section, laxly leafy, to 200 by 0.3 cm, 0.2 cm rhick, thick; branches to 10 cm long; exposed part of internodes 0.2-3 cm long. Leaves linear-lanceolate, thin, 5.7-7.7 by 0.3-0.5 cm; leaf sheaths tubular, smooth, striate, minutely transversely rugulose near the apex, 1.5-3.5 cm long; apex with a triangular, 0.1-0.2 cm long lobe with acute apex; apex with 2 minute obtuse lobes differing 0.05-0.1 cm in length. Inflorescence 2-flowered; peduncle 0.5 cm long; basal inflorescence scales: 1st transversely elliptic, 0.17-0.2 by 0.25-0.3 cm, 2nd oblong, gently upcurved, 0.6-0.7 by 0.2-0.22 cm, with obtuse apex; 3rd enclosing the peduncle, lanceolate, thin and papery, c. 0.5 m long. Pedicel and ovary club-shaped, 0.8 cm long. Median sepal linear­ lanceolate, 2.6 by 0.38 cm; apex acute; 5-nerved. Lateral sepals obliquely oblong-lanceolate in basal part, higher up linear, 2.7 by 0,65 cm; apex acute; 7-nerved; mentum obtuse, 0.45 cm long. Petals linear-lanceolate, 2.4-2.5 by 0.12 cm; apex acute; 3-nerved. Lip 3-lobed, 0.9 cm long; hypochile 0.4 by 0.5 cm, insides with few lanceolate projections, lateral lobes lanceolate to ligulate-lanceolate, 0.2 cm long (along inside margin), the keel plate-like, terminating on the epichile claw in an erect, obtusely bifid projection, with acute apex; epichile shortly clawed to subsessile, suborbicular, 0.5 by 0.4 cm, its margin irregularly dentate to lacerate with subulate to lanceolate processes, on the midnerve with a broken line of lanceolate to triangular, lamellate projections, beyond surface with a broad U-shaped, dense band of subulate processes, its apex subacuminate. Column semiterete, 0.32 cm long (without anther); column foot curved at the apex, c. 0.43 cm long.
(after Ormerod, 2017)).

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