Genus Dendrobium section Biloba
Genus Dendrobium sect. Biloba J.J.Sm., Orchid. Ambon(1905) 67. Type species: Dendrobium bilobum Lindl.
Synonyms:
- Genus Dendrobium sect. Monanthos Schltr. in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee 1 (1905) 50. Type species: Dendrobium bilobum Lindl.
- Genus Monanthos (Schltr.) Brieger in Schltr., Orchideen ed. 3, 1 (1981) 660, as 'Monanthus’. Type species: Monanthos bilobus (Schltr.) Brieger (basionym: Dendrobium bilobum Lindl.).
Rhizome short, roots usually quite thick. Stems numerous, tufted, elongate and slender, not fleshy, many-leaved, unbranched, with apical growth continuing several seasons. Leaves long-lived, usually linear and suberect, glabrous; sheath tubular; apex obtuse, bilobed. Inflorescences lateral from the stem, very short, 1-flowered. Flowers small, not resupinate, lasting at least several days, dull coloured. Mentum usually short, chin-like. Lip not mobile, attached to the apex of the column foot, entire or rather weakly 3-lobed, often with a single, low, bar-like, glossy callus in the basal part; midlobe often fleshy.
Sulawesi, Moluccas, New Guinea, Australia, Solomon islands, Vanuatu, New Caledonia, Fiji. Dendrobium section Biloba contains about 45 species; in New Guinea c. 36 species.
Epiphytes in lowland and montane forest.
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Dendrobieae
- Genus Dendrobium
- Section Biloba
- Lavarack, B., W. Harris & G. Stocker. 2000. Dendrobium and its relatives. Timber Press, Portland, Oregon.
Dendrobium Section Biloba, formerly known as Dendrobium sect. Monanthos, is one of the most uniform and least attractive sections in the genus. The plants typically have many tufted, thin and unbranched stems, thick roots, and relatively short leaves which are 2-lobed at the tip,and are often held almost parallel to the stems. The flowers are solitary, small, with the lip uppermost (i.e. not resupinated), and rather dull coloured. Section Biloba is probably related to section Herpetophytum, see there for some comparative notes.
In New Guinea Dendrobium section Biloba contains the following 35 species and 2 subgeneric taxa:
Dendrobium aethalodes
Dendrobium agrostophylloides
Dendrobium aridum
Dendrobium bicristatum
Dendrobium bilobum
Dendrobium corticicola
Dendrobium crassinervium
Dendrobium crenatilabre
Dendrobium efogiense
Dendrobium erectifolium
Dendrobium fallacinum
Dendrobium hooglandianum
Dendrobium hooveri
Dendrobium integrum
Dendrobium integrum ssp. merianum
Dendrobium isochiloides
Dendrobium kotanicanum
Dendrobium lamproglossum
Dendrobium macrum
Dendrobium montedeakinense
Dendrobium obovatum
Dendrobium obscureauriculatum
Dendrobium piestocaulon
Dendrobium planicaule
Dendrobium poneroides
Dendrobium poneroides var. angustum
Dendrobium procerum
Dendrobium pullenianum
Dendrobium rhytidothece
Dendrobium roseoflavidum
Dendrobium sibilense
Dendrobium subbilobatum
Dendrobium subserratum
Dendrobium vinosum
Dendrobium wekainense
Dendrobium widjajanum
Dendrobium xanthothece
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Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, habit detail, photo A. Schuiteman, based on Yumte 20
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, habit, photo Roy. Bot. Gard. Edin., based on Edinburgh cult. 681445 (Woods 1763)
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, flower, photo J.B. Comber, at National Capital Botanical Garden, Port Moresby
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, flower, photo P. O'Byrne, based on O'Byrne D380
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, habit detail, photo P. O'Byrne, based on O'Byrne D532
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, flower, frontal view, photo A. Schuiteman, based on Leiden cult. 32304
Genus Dendrobium section Biloba
Dendrobium sp. sect. Biloba, flower, photo D. Titmuss, ex Mt Sisa, PNG