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FOC | Family List | FOC Vol. 25 | Orchidaceae

155. Renanthera Loureiro, Fl. Cochinch. 2: 516, 521. 1790.

火焰兰属 huo yan lan shu

Authors: Xinqi Chen & Jeffrey J. Wood

Herbs, epiphytic or lithophytic (rarely terrestrial), robust, monopodial. Stem long, often up to several meters, climbing, sometimes branched, with many nodes and long internodes. Leaves many, distichous, often oblong, flat, thickly leathery, unequally bilobed, with a sheathing base, and blade jointed to sheath. Inflorescence lateral, relatively long, paniculate, occasionally racemose, laxly many flowered. Flowers resupinate, opening widely, predominantly red or orange, sometimes yellow, flat, medium-sized or large. Sepals and petals free; dorsal sepal and petals similar, spreading; lateral sepals usually broader than dorsal sepal and petals, margins subparallel, undulate. Lip attached to column base, immovable, much smaller than petals and sepals, saccate or spurred, 3-lobed; lateral lobes erect, adaxially with 1 callus at base; mid-lobe often ligulate and recurved, small, with lamellate basal calli; spur conic. Column short and stout, without a foot; rostellar projection short; pollinia 4, in 2 pairs, waxy, reniform, slightly unequal in size, each pair with an elastic thread at base, attached by a common linear stipe to a transversely elliptic viscidium.

About 19 species: E India through China to the Philippines and south to Malaysia, Indonesia, New Guinea, and the Solomon Islands; three species in China.

Reviewer L. Averyanov notes that Renanthera vietnamensis Averyanov & R. Rice (Oasis 2(3): 3. 2002), described from N Vietnam, also occurs in S China. However, the present authors could not substantiate this record because they found no relevant specimens.

1 Inflorescences borne opposite leaves; flowers deep red or scarlet; lateral lobes of lip subquadrate to orbicular; mid-lobe without basal calli.   1 R. coccinea
+ Inflorescences axillary; flowers reddish or yellowish; lateral lobes of lip ovate-lanceolate; mid-lobe with basal calli   (2)
2 (1) Leaves 13-25 mm wide; pedicel and ovary reddish; lateral sepals ca. 10 mm wide, reddish; mid-lobe of lip not saccate.   2 R. imschootiana
+ Leaves 9-11 mm wide; pedicel and ovary yellowish; lateral sepals 4.5-5.5 mm wide, yellowish, sparsely spotted with purple-red; mid-lobe of lip subglobose to saccate in apical half.   3 R. citrina

Lower Taxa


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