TAB. 32. 



Tribe Ophryde.e. 



Sub-tribe Dise^. 



Genus Disa. 



Disa sagittalis, Sivartz, in Kongl. Vetensk. Acad. Nya HandL, vol. 

 xxi, p. 212 (1800) ; Limlley, Gen. d Sp. Orch. p. 350 (1838)— (§ Cory- 

 ph£ea). — Herba, 7-20 cm. alta ; caulis erectus aphyllus, vaginis mem- 

 branaceis acutis arete iuvolventibus vestitus ; folia radicalia, 4-9, 

 ligulata acuta, basi angustata, laxe patentia, 4-7 cm. longa ; racemus 

 Sfepius abbreviatus subcorymbosus, rarius cylindricus oblongusve, flores 

 patentes sub lente breviter pubescentes, bracteis membranaceis sub- 

 cbartaceisve, obtuse acutis, ovario brevioribus ; sepala lateralia oblonga 

 acuta, 8 mill, longa ; sepalum impar posticum, 1-2 cm. lougum, e basi 

 erectum oblongum sm'smn dilatatum alte bilobum, lobis obovato- 

 cimeatis angulatis crenulatis basi subiter tortis, calcare pendulo conico 

 obtuso, 3-4 mill, longo (vel filiformi 4-6 mill, longo) ; petala basi lata 

 subreniformia, columnam obtegentia, sursum abrupte angustata lan- 

 ceolato-subulata adscendentia, circa 1 cm. longa; labellum lanceolatum 

 vel lineari-lanceolatum, modice undulatum, 8-9 mill, longum ; rostel- 

 lum perbreve ; ovarium gracillimum rectum, capsula 1-8-2-5 cm. 

 longum. (7'Ar cri'vudl. plur. vie. cxsiccatisque). Orchis sa^ittalis, 

 LinncEUs jiL, Siq>pl. p. 399 (1781) ; Satyrlum sagittale, Thunbenj, 

 Prodr. Plant. Cap. p. 5 (1794). 



Hab: South-western Region; Cape Colony: Outeniqua Mts., 

 Thunbevf) : Plettenberg Bay, April, Burchell, 5344; Gyang K., George, 

 Young; Humansdorp, Sept., Tyson, 2974. — South-eastern Region; 

 Cape Colony: Grabamstown, alt. 750 met., Oct., Galpin, 307; Kat- 

 berg, Dec, Scully, 162. — Natal. 



Plate 32. Fig. 1, flower, front view; 2, ditto, side view; 3, a 

 petal ; 4, a side sepal ; 5, column, with one of tbe petals and tbe lip ; 

 6, lip; 7, odd sepal, — all the foregoing magnified 3 diameters; 8, 

 column, side view; 9, ditto, viewed from above; 10, one of the pollinia, 

 —all the latter variously magnified. 



A herb, 7-20 cm. high ; stem erect, stout or slender, leafless, 

 covered with closely WTapped acute membranous sheaths ; leaves 

 radical, 4-9, linear-oblong acute, narrowed to the base, w'eakly- 

 spreading, 4-7 cm. long; raceme sometimes oblong or cylindrical, 



