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

10. Ponerorchis kiraishiensis (Hayata) Ohwi, Acta Phytotax. Geobot. 5: 146. 1936.

奇莱小红门兰 qi lai xiao hong men lan

Orchis kiraishiensis Hayata, Icon. Pl. Formosan. 9: 116. 1920; Chusua kiraishiensis (Hayata) P. F. Hunt; O. nanhutashanensis S. S. Ying.

Plants 10-18 cm tall. Tubers subglobose or ovoid, 5-10 mm. Stem pale green, 4-12 cm, with 1 or 2 tubular, membranous sheaths at base, 2- or 3-leaved. Leaves cauline, alternate, clustered to widely spaced, green, lacking purple spots, linear to linear-lanceolate, 4-5 × 0.7-0.8 cm, glabrous, apex acute or acuminate. Inflorescence erect, pale green, 4-10 cm, glabrous; rachis 1-3 cm, 1-3-flowered; floral bracts green or purple, lanceolate, 7-20 mm, lower one usually exceeding ovary, apex acuminate. Flowers purple or rose, medium-sized; ovary fusiform, 10-15 mm including pedicel, glabrous. Dorsal sepal erect, oblong, concave, 6-9 × 3-4 mm, apex acute; lateral sepals ovate-oblong, oblique, 8-11 × 3.5-5 mm, apex acute. Petals forming a loose hood with dorsal sepal, very rarely pure white, ovate-oblong, slightly oblique, 6-8 × 3-3.5 mm, glabrous, margin entire to irregularly serrate, apex obtuse; lip obtriangular to suborbicular, 12-15 × 15-16 mm, spurred, 3- or 4-lobed toward apex, disk white or pale yellow at base, spotted with purple; lateral lobes ovate or triangular, 2-4 × 2-3 mm, apex obtuse, truncate; mid-lobe transversely oblong to ovate, 4-8 × 4-8 mm, usually broader than long, apex truncate, emarginate to distinctly notched and forming 2 lobules, often apiculate between lobules; spur pendulous, cylindric-conic, 7-13 × 2-3 mm, apex obtuse. Fl. Jul-Aug.

● Alpine grasslands, scree slopes; 3000-3900 m. Taiwan.

This species is clearly closely related to Ponerorchis chusua and in need of critical review.


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