African Plant Database

Polystachya stuhlmannii Kraenzl.
Protologue : Bot. Jahrb. Syst. 22: 22 (1897)
Information on the genus : Polystachya
Status for TA : rejected (present), is synonym of : Polystachya adansoniae var. stuhlmannii (Kraenzl.) Geerinck
Synonym(s) Homotypic
 Polystachya adansoniae var. stuhlmannii (Kraenzl.) Geerinck
Ecology and distribution
Trop. Afr.
Biology : Epiphytic, or lithophytic herb 7-22-30 cm tall; pseudobulbs forming a chain, ± ovoid, 1-1,5(-6)x0,3-0,8 cm, ribbed, 2-noded; leaves 2-3-4, linear, grass-like, 4-16x0,4-0,1 cm, apex unequally 2-lobed; inflorescence simple, 4,5-18 cm long, 25-200-flowered, subtended at base by 1-2 long narrow sheaths; axes densely pubescent; flowers c. 2 mm Ø, yellow to green tipped with purple, petals and lip purple, often not opening but apparently self-fertilizing; bracts setaceous, 4-7 mm long; pedicel and ovary 2-3 mm long; dorsal sepal ovate, acute, c. 2x1 mm; laterals triangular, c. 3x2 mm; mentum (spur) conical, < 2 mm high; petals linear, c. 1 mm long; lip with short claw, obtriangular, c. 2x1,5 mm, 3-lobed in lower part; side lobes ± orbicular; midlobe triangular, as wide as side lobes; callus fleshy, central, glabrous, between side lobes.
Ecology : (Evergreen) forest; open woodland, high rainfall Brachystegia woodland; on lichen-covered sandstone outcrops; on, e.g., Scorodophloeus zenkeri, Jacaranda; 800-1700 m alt.
  Similar to P. adansoniae which has, however, a longer lip with narrower midlobe (See determination key in Stévart 2003: 102; Syst. Geogr. Pl. 73: 283, 2003).

Bibliography other :
  • Pflanzenw. Ost-Afrikas, C 155 (1895)

Bibliography for Tropical Africa :
  • Exell, A. & Wild, H. (1998). Flora Zambesiaca: Mozambique, Federation of Rhodesia and Nyasaland, Bechuanaland Protectorate. London Kew 11[2]: 336
More info on :
see under Jstor_African Plant Initiative
see under The International Plant Name Index
see under Flora of Mozambique
see under Orchidées d'Afrique Centrale
see under Flora of Zimbabwe
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Record n°43769
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