AFRICAN

ORCHIDS

Nephrangis filiformis (Kraenzl.) Summerh., Kew Bull. 3: 302 (1948).
Homotypic Synonyms:
Listrostachys filiformis Kraenzl. in H.G.A.Engler (ed.), Pflanzenw. Ost-Afrikas, C: 158 (1895).
Angraecum filiforme (Kraenzl.) Schltr., Bot. Jahrb. Syst. 38: 21 (1905), nom. illeg.
Tridactyle filiformis (Kraenzl.) Schltr., Beih. Bot. Centralbl. 36(2): 148 (1918).
Description:
Epiphytic herb. Stem erect or pendent, slender, up to c. 35 cm long, usually branched, rooting at the base. Roots c. 3 mm in diameter. Leaves borne towards the stem apex, 1.5–9 cm × 1–2 mm, terete, needle-shaped, sometimes slightly recurved. Inflorescences arising along the stem from same nodes in successive years, up to 10 mm long, 1–6-flowered.Pedicel and ovary 3–5 mm long; bracts very short. Flowers translucent, light brown or greenish-brown, the lip creamy-white, the column green-brown and anther cap yellow. Sepals 1.5–2.7 × 1.5–2 mm, ovate, obtuse; the lateral sepals connate at the base and slightly oblique. Petals 1.7–2.3 × 0.4–0.6 mm, linear or narrowly lanceolate, acute. Lip 4–5 mm long with a basal concave claw and a 2-lobed, apical lamina c. 3 × 3.5–5 mm; spur 4–9 mm long, narrowly conical, obtuse. Column 0.6–1.2 mm long.
Habitat:
High-level epiphyte of high rainfall woodlands, including dense Cryptosepalum woodland and miombo.
Cultivation:
As given for the genus, warm to cool growing epiphyte.
Distribution:
Trop. Africa
References:
Orchids of East Africa Piers 1968; Flora of Tropical East Africa Vol 11 Orchidaceae Part 3 Cribb 1989; Orchids of Kenya Stewart & Campbell 1996; Angraecoid Orchids Stewart, Hermans and Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 12.03.2017; http://apps.kew.org/wcsp/
Images:
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Botanical Drawing / Herbarium
Nephrangisfiliformis
Photograph copyright Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission.