Prev Taxon: Genus Dendrobium section Herpetophytum
Current Genus: Genus Dendrobium section Latouria
Next Taxon: Genus Dendrobium section Microphytanthe
Dendrobium sleumeri
Dendrobium sleumeri Ormerod, Oasis 2, 4 (2003) 3, 5 (fig.).
Type: van Royen & Sleumer 7289 (holo. L).
Synonyms:
- Dendrobium torricellense auct. non Schltr.: Cribb, Kew Bull. 38, 2 (1983).270 p.p., fig. 12C-H
Terrestrials, herbaceous. Rhizome short, creeping. Stem erect, narrowly clavate, sulcate, 2-leaved, 22-25 by 0.55-0.7 cm. Leaves erect, oblong-lanceolate to oblong, coriaceous, 8.5-10.2 by 2.1-2.2 cm; apex acute. Inflorescence subterminal, erect, sublaxly 4-flowered, 5-7 cm long; peduncle 3.8-5.5 cm long with two scattered sheathing scale leaves each about 0.5 cm long; rachis weakly fractiflex, 1.2-1..5 cm long; floral bracts broadly ovate-suborbicular, to 0.7 by 0.45 cm; with acute apex. Pedicel terete , ovary conically swollen, together 1.2 cm long, verrucose, 6- ribbed. Flowers fleshy. Median sepal concave, elliptic, 0.8-0.9 by 0.45 cm; apex subacute. Lateral sepals obliquely elliptic, 0.95 by 0.7 cm, 0.5 cm wide in the middle; apex subacute; mentum with an acute angle to the ovary. Petal obovate-cuneate, 0.9 by 0.4.5-0.5 cm; apex obtuse-subtruncate. Lip 3-lobed, obtriangular-flabellate, 1.4 by 1.2 cm; lateral lobes subquadrate, 0.5 cm wide; epichile reniform, 0.3-0.35 by 0.5 cm, with emarginate apex, callus from lip base to near base of the epichile, thickly 3-carinate, 0.9-0.95 by 0.2 cm. Column 0.25-0.3 cm long; column foot 0.5 cm long.
(After Ormerod, 2003)
Leaves green. Flowers white suffused green.
Terrestrial or in moss cushions in mossy forest. Altitude 1550 m.
Malesia (Indonesia, New Guinea, endemic).
Indonesia (New Guinea, Papua Barat Prov., Tambrauw Regency).
Intermediate growing terrestrial.
November
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Subtribe Dendrobiinae
- Genus Dendrobium
- Section Latouria
- Species Dendrobium sleumeri
Dendrobium sleumeri Ormerod is most similar to D. mayandyi Reeve & Renz but differs in the mentum which forms an acute angle with the ovary (versus a right angle, cuneate petals (versus ligulate-oblanceolate) and a lip with a narrower liguliform callus with distinctly separated keels (versus an apically dilated callus in which the keels are fused together and barely discemible).
Dendrobium sleumeri Ormerod is also similar to D. torricellense Schltr., but differs in its narrowly clavate stems (versus terete), shorter peduncle, strongly verrucose ovary, cuneate petals (versus oblanceolate), and lip with a reniform midlobe (versus subquadrate).
The flowers of the type specimen, van Royen & Sleumer 7289, do not seem fully developed so the dimensions of the flower parts are probably larger than those given in the description.
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Dendrobium sleumeri
Dendrobium sleumeri Ormerod, drawing by Paul Ormerod in Oasis 2, 4 (2003) 3, 5 (fig.).