Tylostigma tenellum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 23 (1924).
Plants small, 6-1 lcm. tall, with small, oblong tubers; stem with 3-4 basal leaves, and several taller sheaths, acuminate. Leaves flat-ascending, narrowly linear (2.3-5cm. x 1.5-1.75mm.). Rachis straight, narrow (5cm. x 5.5-6mm.), and 10-20 flowered, very densely arranged; bracts lanceolate-acuminate, the inferiors equal to the flowers, the superiors slightly shorter; flowers white, finishing up yellowish. Sepals widely oblong, 1.75mm. long, obtuse and 1 veined, the laterals oblique. Petals widely oval, very obtuse, 1 veined, oblique, slightly shorter than the sepals. Labellum widely oval-obtuse (1.5 x 1.25mm ). provided basally with a scmi-truncate speculum, slightly raised and marginate. Anther short; staminodes very small. Ovary fusiform-cylindrical, obviously twisted, 2.25mm. long.
From humid rocks, from 1600m. alt . flowering: May.
C. Madagascar

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