Species Information - Dendrobium heteroglossum

Dendrobium heteroglossum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1912) 593; 21 (1928) t. 198, fig. 746.

Type: Schlechter 19866 (holo B, lost).

Synonyms:

• Grastidium heteroglossum (Schltr.) Rauschert, Feddes Repert. 94 (1983) 449.
• Dendrobium donacoides Ridl., Trans. Linn. Soc. London, Bot. 9 (1916) 166.
  - Type: Kloss s.n. (Camp 1, 700 ft.) (holo BM, iso AMES).
• Grastidium donacoides (Ridl.) Rauschert, Feddes Repert. 94 (1983) 448.

Rhizome very short, roots elongated, filiform, flexuose, glabrous. Stems crowded, patent, straight to rather straight, 50-60 cm long, densely many-leaved, unbranched. Leaf sheaths entirely covering the stem. Leaves erect-patent, elliptic, 10-13 by 2.9-3.5 cm, apex acuminate. Inflorescences arising laterally from the stem, peduncle hardly developed, 2-flowered, short, laterally compressed, broadly obtuse. Ovary 1 cm long, subsessile, cylindrical, glabrous. Flowers c. 5 cm across, highly fragrant. Dorsal sepal erect, lanceolate-ligulate, 2.5 cm long, apex subacute. Lateral sepals erect, obliquely lanceolate-ligulate, a little widened at the base, 2.5 cm long, apex subacute; mentum short, obtuse. Petals erect, obliquely linear, 2.5 cm long, apex acute. Lip 3-lobed near the middle, 0.9 by 0.65 cm, in basal half with slightly thickened veins, with a verrucose linear basal keel extending to the base of the midlobe, on the midlobe, except along the margins, with backwards pointing subulate papillae; lateral lobes obliquely oblong, obtuse; midlobe much larger, ovate, margins irregular, apex subacute. Column short, rather thick, clinandrium 3-lobulate, the lateral lobules rounded, the median tooth-like, obtuse; column-foot incurved. Anther rounded helmet-shaped, glabrous, truncate in front.
(after Schlechter, 1912).

---