Listrostachys pertusa (Lindl.) Rchb.f., Bot. Zeitung (Berlin) 10: 930 (1852).
Angraecum pertusum Lindl., Companion Bot. Mag. 2: 205 (1837).
Angorchis pertusa (Lindl.) Kuntze, Revis. Gen. Pl. 2: 651 (1891).
Listrostachys jenischiana Rchb.f., Bot. Zeitung (Berlin) 10: 930 (1852).
Listrostachys behnickiana Kraenzl., Notizbl. Königl. Bot. Gart. Berlin 5: 122 (1909).
A robust epiphyte; on old plants, woody stem to 15 cm, long; roots 2-3 mm in diameter, with golden-brown growing tips. Leaves 9 to 15, distichous, set close together, 10-35 x 1-2 cm, linear, folded, very stiff- textured, almost equally and obtusely bilobed at the apex. Inflorescences arising from the axils of lower leaves, 30 cm long, densely many-flowered, the flowers arranged in two rows. Flowers white, with a green spot at the opening of the spur, sometimes spotted with red. Peduncle 5 cm long. Pedicel and ovary 1.5 mm long, papillose; bracts very short. Sepals 3 x 1.5 mm, ovate; petals slightly smaller. Lip 7-8 mm long, the mouth of the spur 3 mm from the base, the apical part 4 x 3 mm, rectangular, the apex with a suggestion of three teeth. Spur green or sometimes reddish, 4 mm long, the apical half swollen to 1.5 mm wide, the apex rounded. Column 1-2 mm long.
Evergreen forest, 500-600 m.
This is a very obliging plant, growing well either mounted or in a pot, and flowering regularly in summer (June). You can grow it in intermediate temperatures (although it should also do well in warm), in moderate shade.
Although the flowers are small, chef all open together and the effect is attractive and most unusual. If a finger is rubbed lightly along a row of flowers, many pollinia will stick (very firmly) to it.
W. & WC. Trop. Africa
Encyclopedia of Cultivated Orchids Hawkes 1965; AOS Bulletin Vol 39 No 10 1970; AOS Bulletin Vol 48 No 2 1979; Angraecoid Orchids Stewart, Hermans, Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 28.02-2017; http://apps.kew.org/wcsp/
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