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Dendrobium mayandyi

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, Orchidee 32 (1981) 73, fig. 3, phot.

Type: Reeve 310 (holo LAE; iso BM, K, L).

Synonyms:

  • Sayeria mayandyi (T.M.Reeve & Renz) Rauschert, Feddes Repert. 94 (1983) 467.

An erect to pendulous epiphytic herb. Pseudobulbs clustered, narrowly clavate or fusiform, slender and terete below, several-noded, 6-30 cm long, up to 1.3 cm diam., drying yellow, orange or reddish, 2-3 (4)-leaved at apex. Leaves coriaceous, suberect, very shortly petiolate, narrowly elliptic-lanceolate, acute, 6-11.5 by 1.4-2.2 cm. Inflorescences 1-4, subterminal, erect to arcuate, emerging through leaf-bases, 8.5-10 cm long, 5-7-flowered; peduncle terete, bearing 3 amplexicaul sheaths along length; bracts falcate, lanceolate, acuminate, 8-12 mm long. Flowers small, very fleshy. Dorsal sepal ovate, subacute or rounded, 11 by 6 mm; lateral sepals obliquely triangular, subacute or rounded at apex, 12 by 10 mm; mentum conical, 8 mm long. Petals linear, rounded at apex, 9-9.5 by 1.5-2 mm, papillose on margins. Lip entire with a narrow claw, notched on each side towards base, obovate, obtuse or rounded at apex, 9-11 by 6-8 mm; side margins erect or incurved; callus fleshy, obscurely 3-ridged, dilated at apex. Column 1.5-3.5 mm long; column foot 7-8 mm long; anther cap hemispherical, papillose.
(after Cribb, 1983).

(after Cribb, 1983).


Flowers off white to pale yellow, mottled and flecked with maroon on pedicel, mentum and base of lip; lip green marked with maroon, with a whitish callus spotted maroon on margin.

Epiphyte in mossy montane forests of Nothofagus, Podocarpus, etc. Altitude 1800 to 3100 m.

New Guinea, Bismarck Archipelago.

Papua New Guinea (widespread in the central mountain range; also on New Britain and New Ireland).

Map: Dendrobium mayandyi T.M.Reeve & Renz, distribution map, redrawn from P. Cribb, Kew Bull. 38 (1983) 294, map 9.

Cool growing epiphyte.

January, May, August, September, December.

  • Cribb, P.J. 1983. Kew Bull. 38: 288, fig. 17, pl. 17A, map 9.

Dendrobium mayandyi is allied to Dendrobium leucohybos Schltr. but differs markedly in having larger acuminate bracts and a distinctive lip which is narrowly clawed with a notch on each margin towards the base, a high fleshy non-sulcate callus and a blunt rather than apiculate apex. It is also allied to Dendrobium pachystele Schltr. but in that species the pseudobulbs are one-leafed and the lip has a bisulcate callus and lacks the notches on the margins near the base.


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Dendrobium mayandyi

overview

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, inflorescence, photo J.B. Comber, based on Kew cult.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, inflorescence, photo P. O'Byrne, based on O'Byrne D150

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, flowers, photo D. Titmuss, based on P. Spence cult.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, photo John Cara, plant habit, cult., from PNG.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, photo John Cara, inflorescence, cult., from PNG.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, photo John Cara, flowers, front view, cult., from PNG.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, photo John Cara, flower, front view, cult., from PNG.

Dendrobium mayandyi

Dendrobium mayandyi T.M.Reeve & Renz, drawing by M. Church in Kew Bull. 38 (1983) 281, fig. 17