Orchids of New Guinea

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Next Species: Dendrobium fulgidum subsp. maritimum

Dendrobium fulgidum

Dendrobium fulgidum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 505; 21 (1923) t. 171, fig. 638.

Type: Schlechter 19053 (holo B, lost; neo Reeve 5515, E, chosen by Dauncey 2003; isoneo K, L, LAE, NSW).

Synonyms:

Pedilonum fulgidum (Schltr.) Rauschert, Feddes Repert. 94 (1983) 459.
Chromatotriccum fulgidum (Schltr.) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 494
Dendrobium fulgidum Schltr. var. angustilabre J.J.Sm., Nova Guinea 12, 4 (1916) 337, pl. 121, 222.
- Type: Gjellerup 863 p.p. (holo BO).
Dendrobium maritimum J.J.Sm., Nova Guinea 14 (1929) 433, pl. 68, 81.
- Type: Feuilletau de Bruyn 395 (holo L).
Chromatotriccum maritimum (J.J.Sm.) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 494
Dendrobium xanthellum Ridl., Trans. Linn. Soc. London, Bot. 9 (1916) 170.
- Type: Kloss s.n. (Camp 6a, 3100 ft.) (holo BM).

Rhizome very short, roots elongated, filiform, flexuose, glabrous. Pseudobulbs crowded, many-leaved, slender, cylindrical, slightly narrowing to the base and to the apex, up to 40 cm long, somewhat curved; . Leaf sheaths entirely covering the pseudobulb. Leaves somewhat spreading to suberect, lanceolate or lanceolate-ligulate, 6-8 by 0.8-1.2 cm, apex unequally bilobulate with the lobules acute, subcoriaceous. Inflorescences lateral from the apical part of the pseudobulb, racemose, erect-patent, 4-5 cm long; peduncle short, rather densely several-flowered. Floral bracts lanceolate, much shorter than the pedicel and ovary, apex subacute. Pedicel and ovary 1.3 cm long, slender, glabrous. Flowers not resupinated, c. 2 cm long. Dorsal sepal elliptic, 0.8 cm long, apex obtuse. Lateral sepals obliquely elliptic, widened at the base, 0.8 cm long, apex obtuse; mentum conical, slightly recurved, c. 9 mm long, subacute. Petals obliquely elliptic, 0.8 cm long, apex obtuse. Lip ligulate, 1.7 by 0.4 cm, base gradually narrowed to the concave base, without callus or keels, slightly widened in the middle, apex obtuse. Column short, clinandrium shortly 3-lobulate, the lateral lobules truncate; column-foot c. 0.9 cm long. Anther reniform-cucullate, broadly obtuse, glabrous.
(after Schlechter, 1912).

Colours:

Flower bright orange to orange-red.

Habitat:

Epiphyte in hill and lower montane forest. Altitude (0-) 700-1300 m.

Distribution:

New Guinea (endemic).

Distribution New Guinea:

Indonesia (Papua Barat prov., Biak-Numfor Regency, and Papua Prov., Jayapura Regency); Papua New Guinea (Southern and Western Highlands and Madang Provinces).

Cultivation:

Intermediate growing epiphyte, keep in shade.

Flowering time in the wild:

January, September, November.

Classification:

Family Orchidaceae
Subfamily Epidendroideae
Tribe Dendrobieae
Subtribe Dendrobiinae
Genus Dendrobium
Section Calyptrochilus
Species Dendrobium fulgidum

Literature:

Dauncey, E.A. 2003. Harvard Pap. Bot. 7 (2003) 186, fig. 7 A-J.
Smith, J.J. 1916. Nova Guinea 12, 3: 337.

Notes:

Dendrobium fulgidum Schltr. is distinguished by the short but (for a species of sect. Pedilonum), fairly lax racemes of small, bright orange flowers with a simple, flat, narrow lip.