Tridactyle filifolia (Schltr.) Schltr., Beih. Bot. Centralbl. 36(2): 144 (1918).
Homotypic Synonyms:
Angraecum filifolium Schltr., Westafr. Kautschuk-Exped.: 284 (1900).
Heterotypic Synonyms:
Listrostachys linearifolia De Wild., Not. Pl. Util. Congo 1: 149 (1903).
Tridactyle linearifolia (De Wild.) Schltr., Beih. Bot. Centralbl. 36(2): 146 (1918).
Tridactyle tridentata var. subulifolia Summerh., Kew Bull. 3: 287 (1948).
Pendent epiphytic herb, forming large clumps. Stems slender, 10–80 cm long, 1–2 mm in diameter, branched. Roots arising near the stem base, smooth, 1–2 mm in diameter. Leaves 7–14 cm × 0.3–1.5 mm, terete, acute, usually grooved on upper surface. Inflorescences arising along the stem, very short, 2–8 mm long, 2–3-flowered.Pedicel and ovary 2–3 mm long, lepidote; bracts 0.5 mm long. Flowers pale ochre in colour or translucent creamy-white, turning orange with age. Sepals 2.3–3.5 × 1–2 mm, lanceolate or ovate, acute, the lateral sepals oblique. Petals 2–3 × 0.6–1 mm, linear-lanceolate, acute. Lip auriculate at the base, 3-lobed at about halfway, 1.7–3.4 mm long and 0.8–2 mm wide; mid-lobe c. 1 mm long, triangular, side lobes tooth-like, spreading, about half the length of the mid-lobe; spur 6–8.3 mm long, filiform, incurved. Column c. 1 mm long.
Evergreen forest . Altitude range 650–1600 m.
As given for the genus, warm to cool, pendent growing epiphyte.
Trop. Africa
Malawi Orchids Vol 1 La Croix 1983; Flora of Tropical East Africa Orchidaceae Vol 3 Cribb 1989; Orchids of Kenya Stewart & Campbell 1996; Flora Zambesiaca Vol 11 Part 2 Pope 1998; Field Guide to Ethiopian Orchids Demissew, Cribb & Rassmusen 2004; Angraecoid Orchids Stewart, Hermans and Campbell 2006; World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; accessed 21.03.2017
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