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FOC | Family List | FOC Vol. 25 | Orchidaceae | Cheirostylis

14. Cheirostylis thailandica Seidenfaden, Dansk Bot. Ark. 32(2): 74. 1978.

反瓣叉柱兰 fan ban cha zhu lan

Plants 12-25 cm tall. Rhizome creeping, swollen, ca. 1 cm in diam. Stem erect, 1-3 cm, often 3- or 4-leaved. Leaves ± withered at anthesis, broadly lanceolate, 2-6 × 1.5-2 cm, thinly textured; petiole-like base and sheath ca. 1 cm. Inflorescence 11-22 cm, pubescent, with several sterile bracts; rachis short, 3- or 4-flowered; floral bracts lanceolate, small, pubescent; pedicel and ovary ca. 5 mm, pubescent. Sepals green-brown, ca. 8 mm, basal 2/3 connate and forming a tube; free apical lobes triangular. Petals not appressed to dorsal sepal, whitish, suboblong, ca. 9 × 2.5 mm, 1-veined, apex recurved; lip whitish, ca. 12 mm, slightly 3-partite; hypochile saccate, inside containing 2 comblike calli; mesochile ca. 4 mm, margin involute; epichile with 2 green spots at base, shallowly bilobed; lobes somewhat flabellate, apical margin irregularly denticulate to wavy. Column ca. 4 mm; stelidia ca. 2 mm; rostellum arms ca. 1.5 mm. Fl. Feb.

In shade of open forests; ca. 1200 m. S Yunnan [Thailand].


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