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FOC | Family List | FOC Vol. 25 | Orchidaceae

13. Hetaeria Blume, Bijdr. 409. 1825.

翻唇兰属 fan chun lan shu

Authors: Xinqi Chen, Stephan W. Gale, Phillip J. Cribb & Paul Ormerod

Cerochilus Lindley; Goodyera sect. Rhamphidia Lindley; Rhamphidia (Lindley) Lindley.

Herbs, terrestrial. Rhizome ascending, elongate, several noded, fleshy; roots arising from rhizome nodes, elongate, fleshy, pubescent. Stem glabrous, leafy. Leaves subrosulate or scattered along stem, narrowly ovate to elliptic, usually asymmetric, membranous to slightly fleshy, with a petiole-like base dilating into tubular amplexicaul sheath. Inflorescence pubescent, with a few scattered sheathing sterile bracts and several to many flowers in a terminal raceme. Flowers not resupinate; ovary not (or rarely slightly) twisted, glabrous or pubescent. Sepals free, similar, outer surface glabrous or pubescent; lateral sepals embracing base of lip. Petals connivent with dorsal sepal and forming inverted hood, usually narrower than sepals, membranous; lip adnate to margin of column, 2-partite or with a short mesochile and 3-partite; hypochile concave, saccate or cupular, containing 1 to several papillose, warty or lamellate calli on either side of midvein; mesochile (when present) with involute margin; epichile entire and tapering or 2-lobed. Column short, with thin to fleshy winglike appendages at apical margin; anther ovoid, 2-locular; pollinia 4, in 2 pairs, clavate, granular-farinaceous, basally attenuate into short caudicles, attached to solitary ovate viscidium; rostellum erect, relatively long, bifid; stigma lobes separate and placed at apical corners of column. Capsule erect, fusiform.

About 30 species: tropical Africa and Asia, extending to New Guinea, NE Australia, and the Pacific islands; six species in China.

Records of Hetaeria cristata Blume from Taiwan and Hong Kong are based on misidentifications of Rhomboda tokioi and R. abbreviata, respectively (see p. 68).

1 Lip 3-partite; mesochile short, slender, with involute margin; epichile enlarged, with 2 suborbicular lobes ca. 2.5 × 2.5 mm.   1 H. anomala
+ Lip 2-partite, lacking a mesochile; epichile very small, entire   (2)
2 (1) Epichile narrowly linear or slightly dilated and broadly ovate; petals obliquely (sub)spatulate   (3)
+ Epichile abruptly attenuate; petals obliquely obovate or rhombic-obovate   (4)
3 (2) Leaves 7.5-13 cm; epichile broadly ovate, ca. 0.5 mm; hypochile calli fleshy, oblong, 2-4-lobed.   5 H. affinis
+ Leaves 6-7 cm; epichile narrowly linear, ca. 1.8 mm; hypochile calli lamellate, suboblong, toothed.   6 H. obliqua
4 (2) Leaves 8-11 cm; dorsal sepal ca. 3.5 mm; epichile ca. 0.5 mm, lateral margin not involute, apex subacute.   4 H. oblongifolia
+ Leaves 3-9 cm; dorsal sepal 5-7 mm; epichile 1-1.8 mm, lateral margin involute, apex acuminate-apiculate   (5)
5 (4) Sepals weakly pubescent on outer surface; hypochile calli papillose, hooked, not divided.   2 H. finlaysoniana
+ Sepals densely pubescent on outer surface; hypochile calli warty, 2- or 3-lobed.   3 H. youngsayei

Lower Taxa


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