TAB. 80. 



• 



Tribe Ophkyde.-i^:. 



Siih-trihc DlSE.K. 



Genus DiSA. 



Disa Tysonii, Bolus in Journ. Linn. Soc.y vol. xxv. (1891), 172. 

 — Herba erecta robusta g"labra, 25-40 cm. alta ; caulis strictus \'el 

 flexuosus validus foliosus; folia erecto-patentia ovato-lanceolata vel 

 lanceolata acuta, basi vag-inantia, G-12 cm. longa ; spica cylindrica, 

 dense mulliflora, floribus adscendentibus ; bracteae herbaceje lanceo- 

 latae acuminata^, flores saepius aequante.s ; sepala lateralia ovalia vel 

 oblique oblonga subacuta, sub apice apiculata, 0"9 cm. long-a ; 

 sepalum impar erectum g"aleatum obtusum, lateralibus aiquilongum, 

 ore late ovato acuto, dorso infra medium in calcar adscendens 

 cylindricum, apice inflatum, 0*4 cm. long"um productum ; petala 

 erecta sursum lanceolata, obtuse acuminata, abrupte g^eniculato- 

 inflexa ideoque uncinata, basi antice ampliata concavaque ; 

 labellum porrectum oblongum obtusum vel subacutum, O'G cm. 

 long-um ; rostellum subelongatum erectum bilobum, lobis di- 

 verg-entibus, petalis adnatis ; anthera horizontalis. [Ex exempl. 

 unico viv. plur. exsiccatisqiie.) 



Hab. : South-eastern Region; Cape Colony; Dohne Mt., 

 Stutterheim District, 1220 met., fl. Jan., T. ^. Stm, 900! same 

 place, Bo/tis, 8708 ; Beeste Kraal, near Kokstad, Griqualand East, 

 alt. 1600 met., fl. Nov.-Dec, Tysoft, 1609!; Insiswa Mt., alt. 

 2070 met., fl. Jan., 7?. Sc/i/ec/i/er, 6509 ! 



Plate 80. Fig-. 1, flower, with bract ; 2, odd sepal ; 8, 3, 

 side sepals ; 4, 4, petals ; 5, lip ; 6, 8, column and petals, front 

 view ; 7, petals and lip, side view ; 9, column, side view ; 10, one 

 of the poUinia. 



An erect robust glabrous herb, 25-40 cm. hig"h ; stem straight 

 or flexuous, stout, densely leafy ; leaves erect-spreading, ovate- 

 lanceolate or lanceolate acute, sheathing at base, 6-12 cm. long ; 

 spike cylindrical, densely many-flowered, flowers ascending ; 

 bracts herbaceous, lanceolate acuminate, usually as long as the 

 flowers ; lateral sepals oval or obliquely oblong subacute, 

 mucronate below the apex, 0-9 cm. long ; odd sepal erect galeate 



