African Plant Database


Disa katangensis De Wild.
Family : ORCHIDACEAE
Protologue : Ann. Mus. Congo Belge. Bot., Ser. 4 25 (1902)
Information on the genus : Disa
 
 
Status
Status for TA : accepted (present)
 
Synonym(s) Homotypic
 Disa erubescens var. katangensis (De Wild.) Geerinck
 
Ecology and distribution
Trop. Afr.
Biology : Terrestrial herb; sterile stem 2-3-leaved, leaves linear, acute, erect, 22x1 cm; flowering stem 40-60 cm tall, leafy; cauline leaves imbricate, sheathing, 4-8x1,2-1,8 cm, apices free; inflorescence 8-16 cm long, lax, 2-8-flowered; flowers red, pink or scarlet, hood with darker spots; bracts lanceolate, 50-70 mm long, long-acuminate, apical part rolled; pedicel and ovary 20 mm long; dorsal sepal spathulate, with linear claw 16-17x3-4 mm, canaliculate, and blade ovate-subcordate, 13-20x8-16 mm, hood 8 mm deep, with spur from ridge below middle pendent filiform to subclavate 13-16 mm long; lateral sepals obliquely oblong, acute, 21-36x9-12 mm; petals 2-lobed, anterior lobe ovate 9-15 mm long, posterior lobe linear 22-30 mm long, parallel at base, then S-curved; lip linear, pendent, 14-22 mm long.
Ecology : Sandy Brachystegia and Uapaca-Monotes woodlands; sandy grassland; open woodland; c. 1000 m alt.
  Rather rare and local species. Closely allied to D. erubescens but spur pendent and bracts overtopping flowers. Geerinck (2011) treats this species only as a subspecies of D. erubescens occurring in S part of the latter’s range incl. Angola, and at lower altitude. “The only specimen from Angola determined by Summerhayes as D. erubescens (Milne-Redhead 4045) is actually D. katangensis” (Szlachetko & al., l.c.).

Bibliography for Tropical Africa :
  • Exell, A. & Wild, H. (1995). Flora Zambesiaca: Mozambique, Federation of Rhodesia and Nyasaland, Bechuanaland Protectorate. London Kew 11[1]: 171
 
More info on :
see under Jstor_African Plant Initiative
see under Flore d'Afrique Centrale
see under The International Plant Name Index
see under African Plants - a Photo Guide
 
Map
More information >> ( work in progress )
 
Record n°43388
Feedback about this record