474 MISS L. S. GIBBS ON THE 
Xyris capensis, Thunb. 
Matopo Hills, vlei ground, general. Fl. Sept. 55. 
Distrib. Tropical and South Africa. 
Commetinacex. (Mr. C. B. Clarke.) 
COMMELINA NUDIFLORA, Linn. 
Victoria Falls, banks of islands and river, amongst reeds. 
Fl. Sept. 120. 
Distrib. Cosmopolitan. 
Froscopa GLOMERATA, Hassk. 
Victoria Falls, bog edge of Rain Forest, Livingstone Island, 
and exmerged rocks in river. Fl. Sept. 297. 
Distrib. Angola, British Central Africa, Zambesi District, 
South-east Africa, and Madagascar. 
A small creeping perennial with purple flowers. 
Juxcaceæ. (Mr. C. D. Clarke.) 
Juncus FONTANESII, Laharpe. 
Matopo Hills, sand-banks in streams. — Fl. and Fr. Sept. 97. 
Distrib. Algeria, Abyssinia, Masai Highlands, Southern 
Europe, and Asia. 
NATADACER, 
POTAMOGETON NATANS, Linn. 
Matopo Hills, streams, general. Fl. Sept. 94; also at Vic- 
toria Falls, in Zambesi River, common. Fl. Sept. 146. 
Distrib. Cosmopolitan. 
Mr. Arthur Bennett, to whom I submitted the above specimens, 
writes :—* There is no doubt both are P. natans, Linn. 146 is 
much like some fluitans forms, but the last leaf it is producing 
decides for natans. There is no record for Tropical Africa, and 
it is very interesting. The nearest station I hear of is * Sources 
LE 
of the Limpopo, Nelson? 
POTAMOGETON PUSILLUS, Linn. 
Matopo Hills, in streams. Fl. and Fr. Sept. 190. 
Distrib. Cosmopolitan. 
EmrocavLACEE. (Dr. Rendle.) 
EnrocAULON sUBULATUM, JV. E. Br. 
Victoria Falls, bog edge of Rain Forest, Knife Edge, and 
Livingstone Island. FI. Sept. 175. 
Distrib. British Central Africa. 
