Ancistrorhynchus clandestinus (Lindl.) Schltr., Beih. Bot. Centralbl. 36(2): 138 (1918).
Homotypic Synonyms:
Angraecum clandestinum Lindl., Companion Bot. Mag. 2: 206 (1837).
Angorchis clandestina (Lindl.) Kuntze, Revis. Gen. Pl. 2: 651 (1891).
Listrostachys clandestina (Lindl.) Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 161 (1897).
Heterotypic Synonyms:
Listrostachys durandiana Kraenzl. ex De Wild. & T.Durand, Bull. Soc. Roy. Bot. Belgique, Compt.-Rend. 38: 65 (1899).
Angraecum clandestinum var. stenophyllum Schltr., Westafr. Kautschuk-Exped.: 283 (1900).
Angraecum brunneomaculatum Rendle, Cat. Pl. Oban: 105 (1913).
Ancistrorhynchus brunneomaculatus (Rendle) Schltr., Beih. Bot. Centralbl. 36(2): 138 (1918).
Ancistrorhynchus durandianus (Kraenzl. ex De Wild. & T.Durand) Schltr., Beih. Bot. Centralbl. 36(2): 138 (1918).
Ancistrorhynchus stenophyllus (Schltr.) Schltr., Beih. Bot. Centralbl. 36(2): 139 (1918).
Stems to 7 cm long, erect or pendent. Leaves 5 to 10, borne in a fan, 15-100 x 1-2 cm, linear, acuminate, the apex very unequally bilobed, with one lobe often almost absent. Inflorescences 2 cm long, densely many-flowered. Pedicel and ovary 7-9 mm long; bracts 2-3 mm long. Flowers white, the lip with green marks in the throat. Sepals and petals 2-5 x 1-2.5 mm, elliptic, obtuse. Lip 4- 9 x 2-4 mm, obscurely trilobed; side lobes rounded, midlobe ovate, obtuse, the edges wavy; spur 3-7 mm long, S-shaped, wide-mouthed and swollen again at the apex. Column 2 mm long.
Epiphytic in evergreen forest, 900-1100 m (3000-3600 ft.). Flowering in March.
As given for the genus, warm to cool growing epiphyte.
W. Trop. Africa to SW. Uganda
Flora of Tropical East Africa Orchidaceae Part 3 Cribb 1989; African Orchids in the Wild and Cultivation La Croix 1997; Angraecoid Orchids Stewart, Hermans and Campbell 2007; WCSP (2017). 'World Checklist of Selected Plant Families. 10.03-2017;
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Habitat/In situ
Ancistrorhynchus clandestinus 01
Photograph© João
Farminhão/ Missouri
Botanical Garden.
Image used with
kind permission.