TAB. 79. 



Tribe Opheydeae. 



Sub-tribe Diseae. 



Genus Disa. 



Disa aconitoid.es, Sunder, in Linnaea, vol. xix,;^. 91 (1847) ; Harvey, 

 Thes. Cap., t. U (1859 1.—(: Eu-disa.)— Herba glabra erecta, 1-2- 

 pedalis ; caulis substrictus foliosus ; folia lanceolata acuta, interuodiis 

 longiora, inferiora 10-15 cm. longa, superiora sensim minora ; spica 

 cylindrica, saepe caule longior, dense multiflora, bracteis lanceolatis 

 acuminatis venosis floribus subaequilongis ; sepala lateralia deflexa 

 oblonga obtusa concava, sub apice mucronulata, circa 1 mill, longa ; 

 sepalnm impar deflexum galeatum, breviter acutum, alte saccatum sacco 

 adsceudente obtuse, totum 7 mill, longum ; petala snb galea inclnsa 

 oblonga basi et apice rotundata, medio sinu rotimdato exciso, colmunae 

 adnata ; labellum oblongo-obovatum deflexum, sepalis brevius ; ros- 

 tellum erectum majusculum subquadratum. {Ex exempli, plur. riv.) 



Hab: South-eastern Region; Cape Colony: 'svooda near Bush- 

 man's K., Olifant's Hoek, fl. Nov., Zetjher : near Grabamstown. 

 alt. 675 met., fl. Noy., Galpin, No. 306!; MacOican : Perie Forest, 

 alt. 1300 met., T. E. Sim .' ; Komgha, Flanaijan. — Natal : Grey Town, 

 Mrs. Saunders ; near Inanda, Wood, No. 1418 ! ; Dargle, Oct., J. 

 Sanderson, No. 745 ! — Traxs-Yaal Republic : Elandsspruitbergen, 

 alt. 2200 met., Dec, Schlechter, No. 3851 !. 



Plate 79. Fig. 1, flower ; 2, odd sepal ; 3, lateral sepals ; 4, lip ; 

 5, flower, with the sepals remoYed ; 6, column ; 7, one of the pollinia, 

 — all Yariously magnified. 



A glabrous erect herb, 1-2 feet high; stem mostly straight 

 leafy ; leaYes lanceolate acute, longer than the internodes, the 

 lower ones 10-15 cm. long, the upper gradually smaller ; spike 

 cylindrical often longer than the stem, densely many-fl., bracts 

 lanceolate acuminate Yeined, about as long as the flowers ; side 

 sepals deflexed oblong obtuse concaYe, mucronulate below the 

 apex, about 4 mill, long ; odd sepal deflexed galeate, shortly 

 acute, with a long ascending obtuse sac or spur, in all about 

 7 mill, long ; petals included within the galea, oblong, rounded 

 at the base and apex and with a roimded recess cut out in the 



