Current Genus: Genus Dendrobium section Calyptrochilus
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Dendrobium rutriferum
Dendrobium rutriferum Rchb.f., Gard. Chron. (1887, II) 746; Lindenia 3 (1887) 491, t. 119.
Type: Horticulture Internationale cult. s.n. (New Guinea).
Synonyms:
- Dendrobium puniceum Rolfe, Bull. Misc. Inform. Kew (1901) 146 (non Ridl.).
- Type: Sander cult. s.n. (X-1898) (holo K). - Dendrobium moirianum A.D.Hawkes, Lloydia 20 (1957) 121 (nom. nov.).
- Pedilonum moirianum (A.D.Hawkes) Rauschert, Feddes Repert. 94 (1983) 461.
- Pedilonum rutriferum (Rchb.f.) Rauschert, Feddes Repert. 94 (1983) 463.
- Chromatotriccum rutriferum (Rchb.f.) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 495
Rhizome short. Stems crowded, elongated-fusiform, to at least 30 cm by 10-12 mm, leafy in upper part, with up to 12 internodes, internodes 2.5-3 cm long. Leaves lanceolate, to 8 by 1.5-2 cm, apex acuminate. Inflorescences many from defoliated stems, racemose, short, subcapitate, densely many-flowered. Floral bracts triangular, minute. Pedicel and ovary 2 cm long. Flowers c. 1.5 cm long. Dorsal sepal triangular-ovate, apex obtuse. Mentum as long as the pedicel with ovary, closed in front. Petals about as long as the dorsal sepal, spathulate, apex obtuse. Lip ligulate-pandurate, with a linear transverse callus above the base, apex calceolate because of incurved margins, denticulate. Column with bilobulate stelidia, filament subulate.
(after Kraenzlin, 1910).
Flower purplish pink with white tips.
Epiphyte in lowland rainforest. Altitude 0 m.
New Guinea, Bismarck Archipelago.
Papua New Guinea (Milne Bay and East New Britain Provinces).
Intermediate growing epiphyte.
November, December.
- Kraenzlin, F. 1910. Orchidaceae-Monandrae-Dendrobiinae I. In A. Engler, Das Pflanzenreich IV.50.II.B.21: 131.
- Lewis, B. & P.J. Cribb. 1991. Orchids of the Solomon Islands and Bougainville: 160.
- Reeve, T.M. 1982. Orchadian 7: 134.
Dendrobium rutriferum is not unlike Dendrobium erosum, but the margin of the lip is much more finely denticulate in the present species.
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Dendrobium rutriferum
overview
Dendrobium rutriferum
Dendrobium rutriferum Rchb.f., flowers, photo J.B. Comber, at National Capital Botanical Garden, Port Moresby
Dendrobium rutriferum
Dendrobium rutriferum Rchb.f., flowers, photo D. Titmuss, based on M. Korornowski cult.