Through Ruanda to Lake Kiwu 71 



a common but beautiful olive tree, Olea Hochstetteri Bak. If 

 such a tree be looked at from the side or from below, it is seen 

 that all the larger boughs, and even the larger branches, stand 

 out quite distinct to the eye, all the minor foliage crowding itself 

 together on the thinner branches at the periphery of the crown. 

 The form of such a crown might be remotely compared with the 

 inflorescence of an umbrella plant. To complete the picture 

 mention must be made of the beard-moss on the crown, which, 

 though appreciable, does not accumulate to the extent of giving 

 the impression of * dejected greybeards,' as it does, according to 

 Volkens, on the lofty trees of Kilimandscharo. 



" For readers who are familiar with the African flora, the more 

 important trees and tree-shrubs are here enumerated approximately 

 to the frequency with which they are met : Olea Hochstetteri 

 Bak., Macaranga kilimandscharica Pax, Syzygium farvifolmm 

 Engl., Olinia Volkensii Gilg., Cara-pa grandif.ora Dawe et 

 S Prague, Neoboutonia macro calyx Pax, Psychotria f.coidea K. 

 Krause, Galiniera coffeoides Del., Xymalos usambarensis Engl., 

 Bersama spec, Polyscias polybotrya Harms., Cornus Volkensii 

 Harms., Ochna densicoma Engl, et Gilg. Syjnphonia globidifera 

 var. africana Vesque (more on the margin than in the deeper parts 

 of the forest), Peddiea Fischeri Engl., Niixia usambarensis Gilg., 

 Rapanea pidchra Gilg., Pygeiijn africanum Hook /., Maesa 

 Mildbraedii Gilg., and finally Hagenia abyssinica, Agauria 

 salicifolia Hook f.. Hex mitis (L) Radlk. var. kilimandscharica 

 Loes., which prefer the forest clearings. The following were 

 observed only to the west of the watercourse : Podocarpiis 

 usambarensis Pilger, P. spec, Parinarium Mildbraedii Engl. 

 We also collected towards the west of the forest Eric ace eg 

 Ficalhoa usambarensis Engl., and amongst sparsely growing 

 vegetation Faurea usambarensis Engl. This find was very 

 interesting from a botanical-geographical point of view, as 

 hitherto it has only been encountered in Angola. 



" Although the forest, as seen from above, bears quite a differ- 

 ent appearance from the forests of Germany, it has a still more 

 unfamiliar aspect when viewed from the interior. There is nothing 



