Tylostigma herminioides Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 21 (1924).
15-25cm. tall herbs; tubers fusiform, elongated by a root; stem more or less flexuous, sheathed basally by the sheaths, bearing 3-4 very loosely arranged leaves medially, narrowly linear-acute (7-15cm. x 2.75-3.25mm.), the superiors smaller. Rachis straight, very densely several-many flowered (4-10cm. x 7-8mm. in diameter); bracts lanceolate, very acuminate, the inferiors longer than the flowers; flowers greenish. Sepals oval, very obtuse, 3 veined, generally 2mm. long, the laterals oblique. Petals widely oval, very obtuse, oblique, front basal margin slightly enlarged, slightly shorter than the sepals and 2 veined. Labellum (1.75 x 1.25mm.), widely oval-obtuse, obscurely trilobulate in front, slightly rugose in front ever so often, provided with a semi-square speculum basally, slightly raised-marginate, and with another speculum a quarter the size in front. Column short (less than 1mm.). Ovary 3.5mm. long.
From humid localities, from 2200m. alt.; flowering: March.
C. Madagascar

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Botanical Drawing / Herbarium
tylostigma herminioides
Photograph copyright Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission.