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FOC | Family List | FOC Vol. 25 | Orchidaceae

94. Tainia Blume, Bijdr. 354. 1825.

带唇兰属 dai chun lan shu

Authors: Xinqi Chen & Jeffrey J. Wood

Ania Lindley; Ascotainia Ridley; Mischobulbum Schlechter; Mitopetalum Blume.

Herbs, terrestrial, glabrous. Rhizome with persistent or decaying tubular scales; roots not branched, villous, with root hairs. Pseudobulb erect, rarely prostrate, with 1 or few internodes. Leaf 1 per pseudobulb, deciduous, articulate, petiolate or not, petiole not sheathing, convolute, plicate or not, glabrous; blade elliptic to (ob)ovate, base decurrent along petiole, margin straight, undulate to crenulate. Inflorescence an erect raceme arising heteranthous on a leafless shoot or lateral from base of pseudobulb, often alternating with fertile shoots; peduncle with few internodes; scales tubular; floral bracts persistent. Flowers resupinate, open simultaneously. Sepals and petals ovate, elliptic, or obovate to linear, entire; lateral sepals decurrent on column foot when present. Lip immobile, entire or 3-lobed, with or without spur, saccate; keels (2 or)3-9. Column straight, with narrow seams that continue onto column foot when present; column foot absent or inconspicuous (rarely long), flat or swollen, without spur; anther cap with 2 thecae, usually 4-locular; pollinia 8, rarely 6 in (3 or)4 pairs, subequal, hard, caudicles present, stipe and viscidium absent. Capsule ellipsoid.

About 32 species: Sri Lanka and India, north to China and Japan, south from Myanmar to New Guinea and the Pacific islands; 13 species (two endemic) in China.

The genus Tainia has been monographed by Turner (Orchid Monogr. 6: 43-100. 1992) and treated in a broader sense to include Ania and Mischobulbum by de Vogel in Pridgeon et al. (Gen. Orchid. 4(1): 158-161. 2005).

Tainia hualienia S. S. Ying (Coloured Ill. Indig. Orchids Taiwan 1: 321. 1977) was described from Taiwan but was not included in either Fl. Taiwan (1978) or Fl. Taiwan, ed. 2 (2000). Its original description seems to be indicative of belonging to Oreorchis rather than Tainia.

1 Leaves sessile, non-plicate, with a cordate base.   1 T. cordifolia
+ Leaves not as above   (2)
2 (1) Pseudobulbs swollen, globose or ovoid, usually consisting of several internodes; inflorescence lateral; lip with a ± distinct spur; petiole usually with an articulation ± halfway (absent in T. viridifusca)   (3)
+ Pseudobulbs thin, cylindric, sometimes swollen toward base, usually consisting of 1 internode; inflorescence terminal; lip at most very slightly saccate; petiole with an articulation   (8)
3 (2) Leaves sessile, 4.5-7 × 3-5 cm, broadly ovate, fleshy or thickly leathery, dark purple abaxially.   2 T. longiscapa
+ Leaves not as above   (4)
4 (3) Lip entire or subentire (when subentire mid-lobe broadest at base), never distinctly 3-lobed, elliptic to slightly obovate in outline.   3 T. hongkongensis
+ Lip distinctly 3-lobed; mid-lobe distinctly narrowed toward base   (5)
5 (4) Lip blade more than 2 × as long as broad, keels always straight; lateral lobes ca. 1 mm wide, acuminate.   4 T. angustifolia
+ Lip blade less than 2 × as long as broad   (6)
6 (5) Lip with 3 lamellae on disk.   5 T. penangiana
+ Lip with 5 lamellae on disk   (7)
7 (6) Pseudobulb obliquely ovoid to ellipsoid, usually prostrate; petiole without an articulation ± halfway; keels on lip sometimes decreasing in height halfway between base of lip and base of lateral lobes, always ± at base of mid-lobe, then increasing in height again; sepals and petals brownish green or purplish brown.   6 T. viridifusca
+ Pseudobulb ± conic, erect; petiole with an articulation ± halfway; keels increasing in height uninterruptedly toward tip of lip; sepals and petals dull reddish yellow.   7 T. ruybarrettoi
8 (2) Lip entire.   8 T. emeiensis
+ Lip 3-lobed   (9)
9 (8) Inflorescence arising directly from a node   (10)
+ Inflorescence arising at least 2 mm above a node   (11)
10 (9) Mature plant less than ca. 15 cm high excluding inflorescence; leaves mottled and tessellate.   9 T. laxiflora
+ Mature plant usually well over 25 cm high, rarely smaller; leaves uniformly colored.   10 T. dunnii
11 (9) Lip with 5 lamellae on mid-lobe.   11 T. minor
+ Lip with 3 lamellae   (12)
12 (11) Lip elliptic to ovate, shorter than 20 mm; column foot shorter than 3 mm.   12 T. latifolia
+ Lip rhombic-hastate, longer than 30 mm; column foot longer than 10 mm.   13 T. macrantha

  • List of lower taxa


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