Bisa.] cxxxiii. ORCHiDEiE (brown). 277 



Petals obliquely ovate, semisagittate on 



the dorsal side .... 15. D. versicolor. 

 Spur stout, not more than three times as long 

 as thiclf. 

 Dorsal sepal erect, its mouth more or less in 

 a line with the axis of the ovary. 

 Spur 1-lf lin. thick or broad at the apex. 

 Bracts 2-3 lin. broad. Lateral sepals 



minutely apiculate . . . 16. D. equestris. 

 Bracts 1-1^ lin. broad. Lateral sepals 

 . with an apiculus 1 lin. long . . 17. D. concinna. 



Spur ^-f lin. thick at the apex . . 18. D. pulchella. 

 Dorsal sepal reflexed, its mouth at a right 

 angle to the axis of the ovary. Lip 

 spathulate-oblong . . . . 19. D. aperta. 

 Lip deeply fringed ...... 20. D. hamatojpetala. 



1. D. Carsoni, N. E. Brown. Plant 16-18 in. (or more) high, 

 glabrous. Stem clothed to the top with appress6d, sheath-like, acumi- 

 nate leaves, the lower veined and mottled with red. Spike about 

 6 in. long, 3|— 4 in. diameter, lax, 10-12-flowered. Flowers large. 

 Bracts shorter than the flowers, 1-lf in. long, 5-7 lin. broad, ovate- 

 lanceolate, acuminate. Dorsal sepal with an erect, incurved claw 

 10-13 lin. long, 1-lJ lin. broad, and an elliptic, obtuse, concave limb 

 8-9 lin. long, 6 lin. broad, with a clavate spur from the middle of its 

 back, 7-8 lin. long, 1 lin. thick near the apex. Lateral sepals widely 

 spreading and ascending, Ij in. long, ^-^^ lin. broad, oblanceolate- 

 oblong, obtuse, concave in the apical part, obliquely attached at the 

 base. Petals l^-lf in. long ; the basal part with large semi-eiliptic 

 auricles 6-7 lin. long, 3J-4J lin. broad; the upper part linear, fol- 

 lowing the curve of the claw of the dorsal sepal to the base of the 

 limb, and in this part J lin. broad, then dilated to IJ-lJ hn. broad, 

 and abruptly curved outwards and then upwards, like a pair of horns, 

 the part above the curve 6-7 lin. long. Lip pendulous, 12-14 lin. long, 

 \-l lin. broad, linear, acute. Anther erect, 4 lin. long, oblong. Ros- 

 tellum short, emarginate, not folded between the anther-cells. 



Mozamto. »lst. British Central Africa : Fwambo, S. of Lake Tanganyika, 

 Carson, 22 ! 



This is the finest of all the Tropical African species of Disa, and evidently a very 

 handsome plant. The stem-leaves appear to be glaucous and somewhat tinted with 

 red. The bracts appear to be of a reddish colour, and the inside of the limb of the 

 dorsal sepal and apical part of the petals are distinctly spotted with purple, whilst the 

 large lateral sepals look as if tbey may have been of an orange tint. 



2. D. erubescens, Rendle in Journ. of Bot. 1895, 297. Plant 

 15-22 in. high, glabrous. Stem clothed with coriaceous, lanceolate, 

 acuminate, appressed sheath-like leaves li-3 in. long, the basal sheaths 

 spotted. Leaves of barren stem a foot"' long, 4-G lin. broad, linear. 

 Spike 3-5 in. long, lax. Flowers large, deep red. Bracts shorter than 

 the flowers, l-\\ in. long, 4-G lin. broad, elliptic-ovate, acuminate. 

 Dorsal sepal with an erect channelled claw 5-6 lin. long, and a boat- 



