TAB. 39. 



Tribe Ophryde.e. 



Sub-tribe Dise^. 



Genus Disa. 



Disa porrecta, Swartz, in Konf/I. Tetcnsk. Acad. Nya Hand!., vol. 

 xxi, p. 211 (1800) — (§ Oregura). — Herba glabra elata; folia radicalia 

 4-6, linearia vel lineari-lanceolata acuminatissma laxa graminoidea, 

 scapo Sfepius breviora, per antliesin emarcida ; scapus teres rigidus 

 substrictus erectus, 35-55 cm. longus, vaginis distantibus setaceo- 

 aciiminatis vestitus, basi fibris foliorum delapsorum cinctus ; spica 

 oblonga multiflora 5-10 cm. longa, 3-3-75 cm. lata, bracteis lauceolatis 

 membrauaceis setaceoacmiiinatis ovarimn subaequantibus ; sepala 

 lateralia elliptica vel suborbicularia obtusa, sub apice mucronata, circa 

 8 mill, longa ; sepalum impar galeatum ovatum emarginatmn, iu calcar 

 cylindricmu obtusmii adscendentem fere rectum 3-4 cm. longum pro- 

 ductum ; petala nana, sub galea abscondita, falcato-oblonga, basi 

 auriculata ; labellum oblongum vel lanceolatum subacutum patenti- 

 deflexum, 1 cm. longum ; rostellum breve ; glandube approximatae. 

 [Ex exempli, plur. viv.) D. Zeyheri, Sonder, in Linnma, vol. xix, p. 95 

 (1847). 



Hab : South-western Region ; Cape Colony : Long Kloof near 

 Groot Kwer, Burchell, 501i. — South-eastern Region; Cape Colony: 

 Eland's Kiver Mts., Uitenhage, March, Ecklon d Zeyher ; Brookbuizen's 

 Poort, near Grabamstown, alt. 730 met., March, J. Glass; Boscbberg, 

 near Somerset East, alt. 1380 met., Feb.-Mch., MacOwan, 1532; 

 Koudveld Mt., Graaff Keinet, alt. 1380 met., Jan., Bolus, 1298. 



Plate 39. Fig. 1, side sepals, under and upper surface ; 2, odd 

 sepal, looking into tbe tbroat ; 3, petals ; 4, lip; 5, lip from another 

 plant, — all the foregoing magnified 2 diameters; 6, column, with petals 

 and lip, side view ; 7, column with petals, front view ; 8, one of the 

 pollinia, — all the latter variously magnified. 



A tall glabrous herb ; leaves 4-6, radical linear or linear- 

 lanceolate, very acuminate, las grass-like, usually shorter than 

 the scape, withered during the flowering period ; scape terete 

 rigid, nearly straight, erect, with distant acute sheaths, clothed 

 at base with the fibres of old leaves; spike oblong many-fl., 5- 

 10 cm. long, bracts lanceolate acuminate membranous, about as 



