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Dendrobium punamense

Dendrobium punamense

Dendrobium punamense Schltr., in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee (1905) 163; Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 164, fig. 614.

Type: Schlechter 14690 (holo B, lost).

Synonyms:

  • Sayeria punamensis (Schltr.) Rauschert, Feddes Repert. 94 (1983) 468.
  • Dendrobium waterhousei Carr, Kew Bull. (1934) 379.
    - Type: Waterhouse 333 (holo K); para: Waterhouse 590 (K).

An erect or pendulous epiphytic or lithophytic herb. Pseudobulbs clustered, cylindrical, scarcely dilated above, 3-6-noded below leaves, 15-30 by 0.4-0.7 cm, green or olive-green, drying yellow, 2-leaved at apex. Leaves subcoriaceous, twisted at base to lie in one plane, oblong-lanceolate or lanceolate, acuminate, 15-30 by 3-4.3 cm. Inflorescences (2-)5-13 cm long, subterminal, few-flowered; bracts ovate to lanceolate, acuminate or acute, 4-7 mm long. Flowers fleshy; pedicel and ovary about 1 cm long. Dorsal sepal ovate, acuminate, 10-13 by 5.5-6 mm; lateral sepals falcate, obliquely broadly triangular, acuminate, up to 14 by 15 mm; mentum large, incurved-conical, 1-1.4 cm long. Petals elliptic, acuminate, 10-13 by 4 mm. Lip 3-lobed towards apex, narrowly clawed below, 13-15 by 14-16 mm when spread; side-lobes as long as midlobe , narrowly oblong, rounded at apex; midlobe transversely oblong, apiculate; callus elongate, fleshy, 3-ridged. Column 3 mm long; foot incurved, up to 14 mm long.
(after Cribb, 1983).

(after Cribb, 1983).


Flowers white to pale green.

Epiphyte in rainforest, growing on tree trunks and large branches in deep shade. Altitude 25 to 500 m.

New Guinea, Bougainville.

Papua New Guinea (Manus Island, East and West New Britain and New Ireland Prov.).

Map: Dendrobium punamense Schltr., distribution map, redrawn from P. Cribb, Kew Bull. 38 (1983) 250, map 4.

Warm to intermediate growing epiphyte, prefers shaded position.

May, July.

  • Schlechter, R. 1912. Repert. Spec. Nov. Regni Veg. Beih. 1: 487.
  • Cribb, P.J. 1983. Kew Bull. 38: 290, pl. 17C, map 4.
  • Lewis, B. & P.J. Cribb. 1991. Orchids of the Solomon Islands and Bougainville: 179.

Dendrobium punamense is most closely allied to Dendrobium euryanthum, sterile specimens of the two being indistinguishable. However, it differs in flower colour and in lip shape, the side-lobes being as long as the midlobe.


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Dendrobium punamense

Dendrobium punamense Schltr., flower, front view, photo Ed de Vogel, Leiden cult. 20081829 (de Vogel & Raka), from Papua New Guinea, East New Britain known

Dendrobium punamense

Dendrobium punamense Schltr., plant habit, photo Ed de Vogel, Leiden cult. 20081682 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., flower, oblique front view, photo Ed de Vogel, Leiden cult. 20081682 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., flower, lateral view, photo Ed de Vogel, Leiden cult. 20081682 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., flower, front view, photo Ed de Vogel, Leiden cult. 20081829 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., flower, front view, photo Ed de Vogel, Leiden cult. 20081829 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., flower, oblique front view, photo Ed de Vogel, Leiden cult. 20081829 (de Vogel & Raka), from Papua New Guinea, East New Britain

Dendrobium punamense

Dendrobium punamense Schltr., habit, photo Roy. Bot. Gard. Kew, based on Sands et al. 2125

Dendrobium punamense

Dendrobium punamense Schltr., flower, photo Roy. Bot. Gard. Kew, based on Sands et al. 2125

Dendrobium punamense

Dendrobium punamense Schltr., photo John Cara, plant habit, cult. John Cara, from PNG.

Dendrobium punamense

Dendrobium punamense Schltr., photo John Cara, flowers, front view, cult. John Cara, from PNG.

Dendrobium punamense

Dendrobium punamense Schltr., photo John Cara, inflorescence, cult. John Cara, from PNG.

Dendrobium punamense

Dendrobium punamense Schltr., photo John Cara, flower, front view, cult. John Cara, from PNG.

Dendrobium punamense

Dendrobium punamense Schltr., photo John Cara, flowers, front view, cult. John Cara, from PNG.oblique

Dendrobium punamense

Dendrobium punamense Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 164, fig. 614

Dendrobium punamense

Dendrobium punamense Schltr., drawing John Cara, plant habit and flower analyses, fom PNG.