TAB. 31. 



Tribe Ophryde^. 



Sub-tribe Dise.e. 



Genus Disa. 



Disa caulescens, Lindley, (iett. d-sp. Orch.-p. 351 (1838). ( j Eu-disa). 

 — Herba glabra spithamaea ad pedalem vel ultra ; caulis gracilis foliosus 

 subrectus flexuosusve adscendens ; folia remota liueari-lauceolata acuta 

 erecto-pateutia, 2-4 cm. louga, superiora sensim minora; racemus 

 laxe 3-12-fl., s»pe flexuosus, 3-7"5 cm. longus, bractes lineari-lanceo- 

 latae, ovariis fere ^equilougfe ; sepala lateralia oblonga subobtusa, sub 

 apice mucronulata, pateutia, circa 1 cm. longa ; sepalum impar galea- 

 tum obtusum erectum, basi iu calcar couicum acutmn peudulum 

 productum, lateralibus fere fequilongum ; petala late obovata, paullo 

 exserta ; labellum liueari-subulatum acuminatissimum, sepalis parum 

 longius ; rostellum erectum, bracbiis abbreviatis divaricatis ; stigma 

 pul\"inatum trilobum ; ovarium gracile cylindricum. [K.c eui')iij>U. 

 l>lur. civ. e.rsicCKtisque.) 



Hab: South-western Region; Cape Coloxy : Du Toit's Kloof, 

 alt. 600-900 met., H. Jan., Drc<ie, Tyson; New Kloof, Tulbagb, Dec, 

 Zeyher, 15G8 ; foot of theMts., uear Certs, amongst stouts iu rivulets, 

 fl. Dec, Bolus, 7449. 



Plate 31. Fig. 1, flower; 2, odd sepal; 3, a side sepal, under 

 side; 4, ditto, upper side; 5, lip, — all the foregoiug magnified 2 

 diameters; 6, flower, the sepals being removed; 7, column, with one 

 of the petals only in position ; 8, one of the pollinia, — all the latter 

 variously magnified. 



A glabrous weak-growing herb, from a span to a foot or more 

 high ; stem slender leafy straight or flexuous ; leaves remote 

 linear-lanceolate acute erect-spreading, 2— t cm. long, the upper 

 gradually smaller ; raceme loosely 3-12 -tl., usually liexuous, 3- 

 7*5 cm. long, bracts linear-lanceolate, nearly as long as the 

 ovaries; side sepals broadly oblong subobtuse, mucroniilate 

 below the apex, spreading, 1 cm. long ; odd sepal galeate obtuse 

 erect, produced at base into a short conical acute pendulous spur, 

 the whole about as long as the side sepals ; petals broadly 

 obovate, partly exserted ; lip linear-subulate, very acuminate, 

 slightly longer than the side sepals ; rostellum erect, with short 



