Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 461; 21 (1923) t. 155
Type: Schlechter 18650 (holo B, lost); para: Schlechter 19339 (BO, L); 19957 (AMES, BM, BO, K, L, MO, S); 1998? (B, lost).
Synonyms:
- Dendrobium cyclobulbon Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 461; 21 (1923) t. 155, fig. 581.
- Type: Schlechter 18650 (holo B, lost); para: Schlechter 19339 (BO, L); 19957 (AMES, BM, BO, K, L, MO, S) 1998? (B, lost).
Rhizome to 25 cm long, creeping, closely appressed to the substratum, roots elongated, filiform, flexuose, glabrous. Pseudobulbs closely spaced, 1-leaved, suborbicular, compressed, with sharp angles, closely appressed to the rhizome, 0.8-1.2 by 0.7-0.9 cm. Leaves oblong or elliptic-ligulate, 2-2.5 by 0.5-0.7 cm, margins often undulate, apex obtuse, coriaceous. Inflorescences arising in succession from the apex of the pseudobulb, solitary or a few together, 1-flowered. Floral bracts small. Pedicel and ovary 1 cm long, subclavate, glabrous. Flower resupinated, c. 2 cm across. Dorsal sepal lanceolate-triangular, widened to the base, 1 cm long, apex obtuse. Lateral sepals obliquely lanceolate-triangular, widened to the base, 1 cm long, apex obtuse; mentum conical, 5 mm long, obtuse. Petals obliquely linear, slightly widened at the base along the anterior margin, 1 cm long, apex obtuse; glabrous. Lip narrowly oblong-ligulate, 1.2 by 0.4 cm, with 2 almost parallel keels from the base to a little below the apex, the keels with a mealy surface in basal half, in apical half with a thickened midrib in between. Column very short, glabrous, clinandrium 3-lobulate, the lateral lobules broadly obliquely triangular, apiculate, the median tooth like and distinctly longer; column-foot 5 mm long. Anther subquadrate-cucullate, truncate in front, glabrous.
(after Schlechter, 1912).
Flowers pale yellow, tips of sepals and petals light orange, basal half of lip with violet-red veins.
Epiphyte in lowland forest, also on solitary trees in grassland. Altitude 20-200 m.
Bismarck Archipelago, New Guinea, Solomon Islands.
Papua (Jayapura Regency); Papua New Guinea (Madang, Morobe, Central, East Sepik (sight record, A.S.), and West New Britain Provinces).
Warm growing epiphyte, prefers light position.
April, July, August, November.
- Smith, J.J. 1916. Nova Guinea 12, 4: 284, t. 104, fig. 180.
- Lewis, B. & P.J. Cribb. 1991. Orchids of the Solomon Islands and Bougainville: 212, fig. 51 a-h.
- O'Byrne, P. 1994. Lowland Orchids of Papua New Guinea: 192, fig.
Characterised by the small, round, flattened pseudobulbs which grow tightly appressed to the bark of the host tree.
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Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 155, fig. 581
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., drawing J.J. Smith, based on Docters van Leeuwen 9393
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., drawing J.J. Smith, based on Gjellerup 966
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., drawing J.J. Smith, based on Gjellerup 966
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., drawing J.J. Smith, based on Gjellerup 966
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., paratype specimen: Schlechter 19957 (L)
Dendrobium cyclobulbon
Dendrobium cyclobulbon Schltr., detail of paratype specimen: Schlechter 19957 (L)