216 BOTANY OF THE UGANDA BOUNDARY COMMISSION. 
LissocHILUS ARENARIUS, Lindl. in Journ. Linn. Soc., Bot. vi. 
(1862) 133. 
Near Lake Karenge. Fl. November. No number. 
Distrib. Widely diffused in Tropical Africa ; also in Natal. 
L. Nyasa, Rolfe, in Dyer, Fl. Trop. Afr. vii. 86. 
Ruchigga, 6000 ft. Fl. November, 462. 
“5-6 feet high." 
Distrib. Nyassaland. 
L. KnznsrI, Reichb. f. in Linnea, xx. (1847) 685. 
Ruchigga, 6800 ft. Fl. November, 427. 
A fine plant with leaves 14 ft. long and scapes 3 ft. high ; 
differing from the other specimens which I have seen in 
its broadly elliptical, almost suborbicular sepals. Mr. Rolfe, 
who has kindly given me his opinion on our specimen, 
agrees that it is probably merely a form of this somewhat 
variable species. 
Distrib. Lake District on Mount Milanji and on the 
Morambala Mountains in Portuguese East Africa, Also 
in South Africa. 
PrEROGLOSSASPIS RUWENZORIENSIS, Rolfe, in Dyer, Fl. Trop. 
Afr. vii. 100. 
Near Lake Karenge. Fl. November. No number. 
Distrib. Mt. Ruwenzori, 5300-7000 ft. 
P. Cansont, Rolfe, l. c.; var. MAJOR, var. nov. Planta egregia, 
folis bipedalibus et scapo (cum racemo) 23-pedale ; 
racemo 5 cm. long. quam in specie laxiore; bracteis 
45 cm. long.; floribus paullo majoribus cum sepalis 
petalisque paullo latioribus. 
Hab. Kagera Valley near Mulema. Fl. May, 276. 
* Flowers white with red centre." 
Distrib. The species occurs in British Central Africa. 
PorxsrAcuxa cuLTRATA, Lindl. Bot. Reg. sub t. $51. 
Ruchigga. Fl. November, 412; fr., 425 in part. 
‘Tree orchid with pink flowers." 
Distrib. Cameroons, Kilimanjaro, and mountains of Usam- 
bara. Also Madagascar, Mauritius, and Bourbon. 
P. NIGRESCENS, Rendle, in Journ. Bot. xxxii. (1895) 200. 
Hunga. Fl. November, 388. 
* Tree orchid with yellow flowers." 
Distrib. Ruwenzori, 7000-10,000 ft. 
