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FOC | Family List | FOC Vol. 25 | Orchidaceae

170. Vanda Jones ex R. Brown, Bot. Reg. 6: ad t. 506. 1820.

万代兰属 wan dai lan shu

Authors: Xinqi Chen & Alexandra Bell

Herbs, epiphytic, monopodial. Stems ascending or rarely arching, usually rather long, stout, rigid, with short internodes and many distichous leaves, with thick roots in lower part. Leaves distichous, flat, narrow, often closely spaced, linear to lorate, conduplicate toward base, with amplexicaul-sheathing base, jointed. Inflorescences erect or suberect, racemose, axillary, usually ascending, sparsely few to many flowered. Flowers large or medium-sized, usually colorful and long-lasting. Sepals and petals similar or sepals wider, often narrowed toward base, margins ± twisted or wavy, often tessellated; lip attached to an indistinct column foot, immobile, shortly spurred, 3-lobed; lateral lobes erect, small; mid-lobe large, usually with longitudinal keels or swellings adaxially. Column short, stout; rostellum short; anther cap subglobose; pollinia 2, subglobose, waxy, each strongly cleft or porate, attached by a common short stipe to a large viscidium.

About 40 species: tropical Asia to New Guinea and Australia; ten species (one endemic) in China.

Vanda testacea (Lindley) H. G. Reichenbach (Gard. Chron., n.s., 8: 166. 1877; Aerides testacea Lindley, Gen. Sp. Orchid. Pl. 238. 1830, "testaceum") was noted from China (without precise locality) by Pearce and Cribb (Orchids Bhutan, 577. 2002). However, the present authors found no relevant specimens and therefore could not substantiate the occurrence of this species in China. Vanda testacea otherwise occurs in Bhutan, India, Myanmar, Sri Lanka, and Thailand.

1 Inflorescence taller than leaves, at least 20 cm   (2)
+ Inflorescence shorter than leaves, less than 20 cm   (5)
2 (1) Sepals and petals blue or tinged with blue; mid-lobe of lip oblanceolate or ligulate   (3)
+ Sepals and petals yellowish or greenish, with brown markings; mid-lobe of lip pandurate   (4)
3 (2) Flowers 1.5-2.5 cm in diam.; sepals and petals not tessellated; sepals 10-17 mm.   5 V. coerulescens
+ Flowers 6-9 cm in diam.; sepals and petals tessellated; sepals 35-50 mm.   2 V. coerulea
4 (2) Lip as long as or longer than sepals; lateral lobes of lip ovate or triangular.   10 V. fuscoviridis
+ Lip shorter than sepals; lateral lobes of lip suborbicular, apex rounded to truncate.   4 V. lamellata
5 (1) Inflorescence ca. 8 cm or more in length; sepals and petals distinctly tessellated   (6)
+ Inflorescence shorter than 8 cm; sepals and petals not tessellated   (8)
6 (5) Lip shorter than lateral sepals; calli 2 on lip near entrance to spur.   1 V. brunnea
+ Lip as long as or longer than sepals; calli absent on lip   (7)
7 (6) Bracts 3-5 mm; spur 7-8 mm.   3 V. concolor
+ Bracts 2.5-3 mm; spur 2.5-3.5 mm.   6 V. subconcolor
8 (5) Flowers ca. 2 cm in diam. or less, not widely opening; lip spurless.   8 V. alpina
+ Flowers medium-sized, more than 2 cm in diam., widely opening; lip with a spur at least ca. 4 mm   (9)
9 (8) Petals yellow-green; mid-lobe of lip ca. 10 mm or less, apex cleft; column white.   9 V. cristata
+ Petals cream-yellow; mid-lobe of lip longer than 10 mm, apex obtuse to acute; column cream-yellow.   7 V. pumila

Lower Taxa


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