COLLECTED ON MT. RUWENZORI. 231 
more or less widely distributed in the highlands of tropical Africa. Of these 
a minority occur on both sides of the continent ; such are :—Ranunculus 
membranaceus (Abyssinia, Kilimanjaro, Zambesi Highlands and Наа), 
Pavonia Schimperiana (Abyssinia to Cameroons and Angola), Kosteletzkya 
adoensis (Abyssinia to Nyasaland and Cameroons), Cassia didymobotrya (east 
Africa and Angola), Discopodium penninervium. (Uganda and Nyasaland and 
Cameroons), Micromeria biflora (east tropical and South Africa and 
Cameroons), Plantago palmata (Kilimanjaro to Cameroons), Rumex Steudelit 
(east tropical Africa and Cameroons), Twice as many are restricted to 
Eastern Africa including the Central Lake district: such are Polygala 
persiwariefolia, Sida rhombifolia, Geranium aculeolatum, Coreopsis abyssinica, 
Lactuca abyssinica, Lysimachia africana, Moschosma multiflorum, Plectranthus 
Schimperi, hume abyssinicus, which have a northward range, generally as 
far as Abyssinia ; and others with a more southern or restricted distribution, 
such as Torilis gracilis (Usambara, Milanji), Cynoglossum geometricum 
(British East Africa and Shire Highlands), Solanum aculeatum (Uganda, 
Shire Highlands and South Africa), Lissochilus Krebsii (a South African species 
found in the highlands of Portuguese East Africa and Milanji), Disa Stairsii 
(Kenia, Kilimanjaro), and the endemice species Vernonia ruwenzoriensis, 
Lissochilus ruwenzoriensis and Satyrium crassicaule. At this altitude were 
also collected the north temperate species Sanicula europæa and Orobanche 
minor. The following novelties were found :—Begonia Wollastoni allied to 
В. Johnstoni from Kilimanjaro and Kenia, Pentas pubiflora var. longistyla, 
Pavetta ruwenzoriensis, also collected by Scott Elliot at 7000-8000 ft. and in 
Uganda, Grumilea megistosticta, Vernonia Wollastoni, Conyza scariosa, Senecio 
Wollastoni, Plectranthus Wollastoni, Peperomia ruwenzoriensis, closely allied 
to P. Stuhlmanni, another endemic species, and Polystachya bicarinata. 
Between 7000 and 8000 feet is found the biggest forest of Ruwenzori. A 
large Dombeya with clusters of white flowers is very noticeable, and one of the 
finest trees, though not very numerous, ix а Podocarpus. A sweet-scented 
begonia (probably Begonia Wollastonz) is found about the lower trunks, and 
tree-ferns oecur in shady places and on the banks of the streams. 
At 8000 feet were collected the widely spread tropical African highland 
species Stachys aculeolata (Cameroons, Clarence Peak Fernando Po, and 
Abyssinia), Begonia Meyeri-Johannis, previously found on Kilimanjaro, and 
Habenaria Ветер, previously collected by Scott Elliot at 6000-7000 ft. 
Also Hibiscus diversifolius var. granatensis, a tropical South American variety 
which is also recorded from Uganda. 
8000-9000 feet. The slope of the mountains becomes much steeper, and the 
forest thins out into open spaces covered with bracken and occasional big 
trees, having very much the appearance of the higher slopes of the New Forest. 
This gives way to a belt of small tree-heath (Erica arborea) and Podocarpus, 
and so to the zone of bamboos, which begin on the east side of Ruwenzori 
n2 
