Base de données des plantes d'Afrique


Disa baurii Bolus
Protologue : J. Linn. Soc. Bot. xxv. 174 fig. 1 (1889)
Informations sur le genre : Disa
 
 
Statut
Statut pour SA : accepté (présent)
Statut pour TA : accepté (présent)
 
Synonyme(s) homotypique(s)
 Herschelia baurii (Bolus) Kraenzl.
 Herschelianthe baurii (Bolus) Rauschert
 
Synonyme(s) hétérotypique(s)
=Herschelia bachmanniana Kraenzl.
=Herschelianthe bachmanniana (Kraenzl.) Rauschert
=Disa equestris auct.
=Herschelia hamatopetala (Rendle) Kraenzl.
=Disa hamatopetala Rendle (1894)
 
Ecologie et distribution
Afr. Trop.
Biologie : Beautiful terrestrial slender herb 20-60 cm tall, leafless at anthesis but with a tuft of old leaves at stem base; tubers ellipsoid, 7x3 cm; leaves 3-6 on sterile stem, filiform, grass-like, stiff, 30x0,1 cm, developing after anthesis; flowering stem with sheath-like leaves only; inflorescence 6-12 cm long, 3-6 cm Ø, laxly 2-14-flowered; flowers deep blue, rarely white, 2-4 cm Ø; bracts 6-20 mm long; pedicel and ovary 10-15 mm long; dorsal sepal hood-like, 16-20x6-12 mm, 5-10 mm deep, with upcurved cylindrical spur 5-8 mm long; lateral sepals deflexed, oblong, acuminate, 10-2x5-9 mm; petals inside hood, spanner-shaped, 8-15x3-4 mm, with a basal lobe, then narrowed at middle, then expanded with 2-lobed tip; lip projecting, elliptical-orbicular, 10-25x10-20 mm, margins deeply fringed.
Ecologie : (Short) grassland in well-drained areas, or with scattered shrubs; roadside cuttings in gravelly soil; in grass often burnt in the dry season; flowering after the first rains; (1000-)1800-2700 m alt.
  Very variable in several characters over the whole distribution area; it may be possible to distinguish geographical variants.
  Olzewski & Szlachetko in Polish Bot. J. 48: 117, 2003, give D. longilabris Schltr./Herschelia longilabris (Schltr.) Rolfe as synonyms. According to Cribb & Leedal, o.c.: 203, the latter is “a close ally”, treated by us below as a distinct species.
  E S. Africa, Lesotho, Swaziland. Perhaps also in Katanga (Zaire).
Afr. Austr.
Biol./Eco : perennial-Herb, Geophyte- Ht 0.2 - 0.4 m. Alt: 150 - 1800 m. Distribution: EC, KN, LP, MP, SWZ

Bibliographie pour l'Afrique Australe :
  • Orchids of Southern Africa : 266 (1999).
 
Plus d'info sur :
voir d'autres informations sous Jstor_African Plant Initiative
voir d'autres informations sous Flore d'Afrique Centrale
voir d'autres informations sous The International Plant Name Index
voir d'autres informations sous Flora of Mozambique
voir d'autres informations sous African Plants - a Photo Guide
voir d'autres informations sous Flora of Zimbabwe
 
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