Dendrobium rhodostictum F.Muell. & Kraenzl., Österr. Bot. Zeitschr. 44 (1894) 300.
Type: Sayer s.n. (1887, Bourawarri (camp 9), New Guinea) (holo HBG).
- Dendrobium madonnae Rolfe ex Hook.f., Bot. Mag. 129 (1903) t. 7900.
- Type: Sander cult. s.n. (1899, New Guinea) (holo K).
- Sayeria rhodosticta (F.Muell. & Kraenzl.) Rauschert, Feddes Repert. 94 (1983) 468.
Epiphytes or sometimes terrestrials, herbaceous, erect. Pseudobulbs tufted, narrowly fusiform (New Britain), or thin reedlike with only the 3-5-upper internodes abrubtly and markedly dilated into an ovoid pseudobulb (Bougainville), 9-25 by 0.3-1.2 cm, 2-4-leaved at apex. Leaves suberect or spreading, coriaceous, ovate-lanceolate to linear-lanceolate, minutely emarginate at acute to obtuse apex, 5-11 by 1-2.5 cm. Inflorescences apical or subapical, erect to arcuate, few-flowered; bracts elliptic, acute, 3-4 mm long. Flowers subnutant, white with purple spots on side margins of lip; pedicel and ovary 2.5-3.5 cm. Dorsal sepal ovate, acute or acuminate, 1.8-2.5 by 1 cm; lateral sepals falcate-lanceolate, acuminate, 1.8-2.2 by 1-1.1 cm; mentum obliquely conical, 8-10 mm long. Petals obovate-spathulate, obtuse to apiculate, 3-3.5 by 1.5-2.4 cm. Lip obscurely 3-lobed towards apex, broadly obovate in outline 1.9-2.6 by 1.8-2.8 cm; side-lobes erect-incurved, semicircular, often overlapping and larger than midlobe ; midlobe often obscure, transversely oblong to ovate, apiculate; callus 3-ridged above, raised and 3-lobed at base. Column 2.5 mm long; foot 7-9 mm long.
(after Cribb, 1983).