TAB. 30. 



Tribe Ophryde^. 



Sub-tribe Dise^. 



Genus Disa. 



Disa tripetaloides, X E. Brou-n, in Gard. Chron., ser. Hi, vol. v, 

 />. 360 (1889) car. aurata. (§ Eu-disa). — Herba erecta vel deciunbens, 

 glabra ; caulis subflexuosus, iuferue foliosus, sursum vaginis berbaceis 

 lauceolatis aeutis vestitus ; folia 4-8, basin versus conferta lanceolata 

 vel ligulata, acuta laxa erecto-patentia, 6-10 cm. longa ; racemus laxe 

 4-8 -fl., bracteis lauceolatis erectis, ovario brevioribus ; sepala lateraHa 

 elKptica patentia, circa 1-1 cm. longa; sepalum impar posticum sub- 

 galeatum vel infundibulare, cum calcare late conico obtuso 1 cm. 

 longum ; petala subgalea abscondita suberecta falcate -oblonga obtusa, 

 apice supra column am incurva ; labeUum oblongum vel lanceolatum 

 obtusum patens, 4 mill, longum ; rostellum suberectum ovatum, 

 bracbiis abbre^•iatis ; stigma pul^•iDatum, obscure trilobum ; ovarium 

 cyliudricum, 1-5 cm. longum. (Ex exempli, plur. vie.) — Orchis tripeta- 

 loides, Linnmis fit., Suppl. p. 398 (1781) ; D. venosa, Lindleij, Gen. <£• 

 Sp. Orch. p. 351 (1838) non Swartz. 



Hab: South-western Region; Cape Colony: on the lofty 

 southern slopes of the Laugebergen, near the town of Swellendam, 

 Jan. 16, 1815, Burchell, 7409 ? ; same place, by streams, alt. from 900 

 to 1100 met., Jan. 1890, Bolus, 7339; Herb. Norm. Austr.-Afr., 1098. 

 — (The commoner pink-fl. form extends widely from the Hottentot's- 

 holland Mts. on the west to Natal on the east, and the following 

 among other numbers may be cited : Burchell, 6123 ; Zeyher, 3916 ; 

 3/rtcOit7Y», 1095; Bolus, 4209; J. M, Wood, 1981.) 



Plate 30. Figs. 1, 2, flowers; 3, a side sepal; 4, odd sepal ; 5, 6, 

 hp, from different plants, — all the foregoing magnified 2 diameters ; 

 7, 8, flower, the sepals being removed ; 9, column, with one petal left 

 in position ; 10, one of the poUinia, — all the latter variously magnified. 



An erect or decumbent glabrous herb ; stem somewhat 

 flexuous, leafy below, clothed with herbaceous lanceolate acute 

 sheaths ; leaves 4-8, clustered at the base, ligulate acute, loosely 

 spreading, 6-10 em. long; raceme loosely 6-8-fl., bracts lanceo- 

 late shorter than the ovary; side sepals elliptical spreading, I'l 

 cm. long ; odd sepal posticous subgaleate or funnel-shaped, 



