Species Information - Dendrobium yondaliae

Dendrobium yondaliae Ormerod, Checkl. Papuasian Orch. (2017) 275, 489 (fig.)

Type: Reeve 1028 (holo AMES; iso BISH, BO, CANB, E, K, L, LAE, NSW, UPNG).

Synonyms:

Epiphyte(?), herbaceous. Roots and rhizome not seen. Stem fragment slender, terete, sublaxly leafy, 38.2 by 0.08 cm. Leaves lanceolate, 5.2-6 by 0.3 cm; leaf sheaths tubular, striate, smooth, 1.2-1,7 cm long, at the apex with a triangular, acute, 0.2 cm long lobe; apex with 2 minute obtuse lobes differing 0.3 cm in length. Inflorescence 2-flowered; basal inflorescence scales: 1st transversely elliptic, 0.13-0.17 by 0.2-0.3 cm, 2nd oblong-lanceolate, upcurved, 0.4 by 0.15-0.2 cm, with obtuse apex; peduncle c. 0.3 cm long. Pedicel and ovary club-shaped, 0.8 cm long. Median sepal linear-lanceolate, 3.65 by 0.45 cm; apex acute; 7 nerved. Lateral sepals obliquely dilated basally, upper part-lanceolate; apex acute; 7-nerved, 3.5 by 0.6 cm; mentum obtuse, c. 0.45 cm long. Petals linear, 3.45 by 0.07 cm; apex acute: 3-nerved. Lip 3-lobed, 0.85 cm long; hypochile c. 0.32 by 0.38-0.39 cm, keel 1, plate-like, lateral lobe triangular to narrowly triangular, 0.13-0.2 cm long, with acute apex, along their base with scattered short projections; epichile transversely rhombic, c.0.53 by 0.5 cm incl. the 0.07-0.09 by 0.22 cm big claw, margins deeply and irregularly laciniate, keel 1, plate-like, continuing from the one on the hypochile but lower on the claw and the lower half of the epichile and there with a few extending projections, terminating in a series of irregular tooth-like to linear, acute to subacute projections, upper half median with long, club-shaped to subulate hairs, with acute apex. Column 0.42 cm long (c. 0.38 cm long without the anther), on each side with a short, obtuse lobule; column foot c. 0.45 cm long, inside near the apex with a 2-lobed convexity, below this excavate.
(after Ormerod, 2017)).

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