TAB. 29. 



Tribe Ophktdeje. 



Sub-tribe Dise^. 



Genus Disa. 



Disa ovalifolia, Sonder, in Linnaa, vol. xix, p. 93 (184:7) — ( § Eu- 

 disaj.^Herba erecta glabra, 10-25 cm. alta ; caiilis rectus paiici- 

 foliatus ; folia ovata acuta, 2 iufima humistrata, 3- 5— 5 cm. longa, 

 superiora o-Q erecto-patentia sensim minora, caulem laxe amplectentia 

 in bracteas abeuntia ; spica cvliudrica, 6-12-flora ; bracteae foliaceae, 

 inferiores floribus longiores, superiores breviores ; sepala lateralia 

 oblique ovato-oblonga acuta adscendentia incurva, circa 1 cm. longa ; 

 sepaluni impar posticum infxindibulare, ore ovato, calcare filiformi 

 adscendente sensim contracto, totum 1-2-1 '6 cm. longum ; petala 

 oblonga, apice parimi falcata, secus marginem galeae imposita nee 

 adliaerentia, subexserta ; labellum lineare obtusum decurvum, apicem 

 versus ampHatum crassum carnosum, basin versus transverse corruga- 

 tum, circa 8 mill, longum ; rostellum adscendens, brachiis divaricatis ; 

 anthera horizontalis ; ovarium cylindricum, transverse corrugatum. 

 [Ex exempli, plur. viv.) 



Hab : South-western Region ; Cape Coloxt ; near Brakfontein, 

 Clanwilliam, Ecklon d- Zeyher : on a low sandy hill on Hugo's farm, 

 near Gydouw on the Cold Bokkeveld, about 12 miles from Ceres, alt. 

 about 1000 meters, fl. middle to end of Sept., Bolus, 7326. 



Plate 29. Fig. 1, flower, front view; 2, flower, the sepals being 



removed; 3, odd sepal ; 4, petal,' viewed from witbin, — all the fore- 

 going magnified 3 diameters; 5, column, magnified. 



Erect glabrous, 10-25 cm. high ; stem straight sparingly 

 leafy ; leaves ovate acute, the two lower spreading on the 

 gi-ound, 4-5 cm. long, the succeeding 5 or 6 smaller, more erect, 

 loosely sheathing the entire stem and passing gradually into 

 bracts; spike cylindrical, 6-12-fl., bracts leaf-like, the lower 

 exceeding, the upper shorter than the flowers ; side sei3als 

 obliquely ovate-oblong acute, somewhat ascending and incurved, 

 about 1 cm. long ; odd sepal posticous, inverted-funnel-shaped, 

 mouth ovate, spur straight gradually tapering to the apex, at 

 length filiform and pointing upwards along the rachis, the whole 

 1*2-1"6 cm. long; petals oblong, slightly falcate at the apex, 



