Current Genus: Genus Dendrobium section Cadetia subsection Sarcocadetia
Next Taxon: Genus Dendrobium section Calyptrochilus
Dendrobium repandum
Dendrobium repandum Schuit.& de Vogel, Malesian Orchid J. 9 (2012, publ. 2011) 7, fig. 4-5
Type: Royal Botanic Garden Edinburgh cult. C4612 (Woods 152A) (holo E, spirit)
Synonyms:
Rhizome very short. Pseudobulbs crowded, 2–4 by 0.2–0.25 cm, terete, weakly 4-ribbed, 1-leaved. Leaf 2–3 by 0.3–0.6 cm, linear-oblong; base cuneate; apex obtuse, minutely bilobulate. Inflorescences adaxial and abaxial, solitary; peduncle 0.3–0.4 cm long; basal peduncle scale tubular, 0.3–0.4 cm long. Pedicel and ovary 1.3 cm long, 3-winged, glabrous. Median sepal ovate, reflexed, 0.62–0.75 by 0.29–0.35 cm; apex subacute; 3-nerved. Lateral sepals obliquely ovate, patent, 0.97–1.3 by 0.33–0.39 cm from apex to tip of the mentum; apex subacute; 3-nerved. Mentum 0.43–0.53 cm long, cylindrical, straight; closed apical part 0.29–0.32 cm long, with obtuse apex. Petals porrect, narrowly ovate, 0.57–0.59 by 0.16–0.22 cm; margins entire; apex obtuse to subacute; 3-nerved. Lip 3-lobed, clawed, including the claw 1.3–1.4 cm long; claw adnate to the column-foot, linear, finely pubescent, 0.5–0.63 by 0.08–0.12 cm; lateral lobes obliquely linear-oblong, porrect, 0.23–0.37 by 0.06–0.1 cm, with obtuse apex; midlobe large, broader than long, obliquely linear-oblong, porrect, 0.54–0.62 by 0.68–0.82 cm; margins irregularly wavy-erose; apex truncate to retuse, with a very short mucro; callus at base of the midlobe narrowly oblong, decurrent towards the apex, papillose, finely pubescent towards the base. Column c. 0.15 cm long, in front below the stigma very finely pubescent; wings rectangular, somewhat retuse, glabrous; clinandrium entire, margin in the middle with a low tooth; column-foot 0.5 cm long. Anther 0.09 cm wide, cucullate; base emarginate; apex retuse, papillose; pollinia 0.08 cm long. Fruit not seen.
(after Schuiteman & de Vogel, 2012, publ. 2011)
Flower white, the anther with two blackish spots that turn brown with age.
Low epiphyte in oak forest, locally common. Altitude 900–1200 m.
New Guinea (endemic).
Papua New Guinea, Oro and Milne Bay Provinces; see map
Intermedium growing epiphyte.
June (in cultivation in Edinburgh in January).
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Dendrobiinae
- Genus Dendrobium
- Section Cadetia
- Subsection Sarcocadetia
- Species Dendrobium repandum
Dendrobium repandum is similar to D. macrolobum J.J. Sm., from which it differs in the shape of the midlobe of the lip, which is longer than wide in D. macrolobum and has a long-tapering base, and in the longer and much narrower lateral lobes, the thicker, straight mentum, and the porrect, not recurved petals. Moreover, D. macrolobum occurs at higher elevations, between 2000 and 3250 m.
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Dendrobium repandum
Dendrobium repandum Schuit.& de Vogel, Malesian Orchid J. 9 (2012, publ. 2011) 7, fig. 4-5. Drawn by Mutsuko Nakajima from type: Royal Botanic Garden Edinburgh cult. C4612 (Woods 152A)