TAB. 83. 



Tribe Ophrydeae. 



Sub-tribe Diseae. 



Genus Disa. 



Disa longifolia, LindU'i/, Gen. d: Sp. Orrh., p. 349 (1838).— 

 (§ Eu-disa). — Herba erecta tota fere glabra, 7*5-37 cm. alta ; caulis 

 strictiis paucifoliatus ; folia erecta saepe incurva linearia acuminata, 

 5-20 cm. longa, superiora sensim minora in bracteas abeiintia ; spica 

 ovata vel oblonga saepius breviuscula, 1-5-3 cm. diametro, sub dense 

 8-20-fl., bracteis inferioribus flores saepius multo superantibus, superi- 

 oribus floribus brevioribus ; sepala labellumque plus minus scabriusculo- 

 velutina ; sepala lateralia pateutia oblique oblonga vei lineari-oblonga 

 subobtusa apiculata, 6-8 mill, longa ; sepalum impar posticum galeatum 

 acuminatum, 1-2 cm. longum, calcare subcylindrico compresso, medio 

 constricto, apice paullo inflato, circa 4 mill, lougo ; petala sub galea 

 inclusa supina oblongo-falcata acuminata apice adscendentia, basi 

 dentata, 4-5 mill, longa ; labellum lineare vel lineari-iauceolatum 

 patenti-decurvum, 5-6 mill, longum ; rostellum abbreviatum vix ultra 

 stigma elevatum ; anthera reflexa, subpeudula. (£".1- exempli, plur. viv.) 



Hab : South-western Region ; Cape Colony : Piquetberg, alt. 

 600-900 met., Nov., Drege, No. 564 ; marshy places. Hex E. Valley, 

 450 met., Oct., Tyson, No. 644 ! ; rocky places near Ceres, 550 met., 

 Oct., Bodkin (No. 7325 in my herb.). 



Plate 83. Fig. 1, flower, front view; 2, one of the side sepals; 

 3, odd sepal ; 4, column with petals and lip ; 5, column with lip and 

 one petal in position ; 6, lip ; 7, lip, from another plant and £i-om a 

 different locality ; 8, base of the spur of the galea, under side, from the 

 plant last mentioned, — all variously magnified. 



An erect almost entirely glabrous herb, from a span to a foot 

 high or more ; stem straight few-leaved ; leaves erect, often 

 incurved, linear acuminate, 5-20 cm. long, the upper gradually 

 smaller and passing into bracts ; spike ovate or oblong, mostly 

 rather short, l*o-3 cm. in diameter, somewhat densely 8-20-fl., 

 lower bracts longer, upper shorter than the flowers ; sepals and 

 lip more or less roughly or velvety pubescent ; side sepals 

 spreading, obliquely oblong or linear-oblong subobtuse apiculate, 

 6-8 mill, long ; odd sepal posticous galeate acuminate, 1*2 cm. 



