180 pR. J. D. HOOKER ON THE PLANTS 
Poa nemoralis, 7000-10,000 ft. (Minute seeds.) 
Keeleria cristata, 8000-12,000 ft. (Ditto.) 
Vulpia bromoides, 7000-10,000 ft. (Ditto.) 
Festuca gigantea, 8500 ft. (Ditto.) 
Brachypodium sylvaticum, 7000 ft. (Ditto.) 
Andropogon distachyus, 7000 ft. (Ditto.) 
Of these 27, all but the Radiola, Juncus, and Festuca are Abys- 
sinian, and these latter are for the most part West-European forms. 
The most remarkable features of the Temperate vegetation of 
these mountains are— 
1. The poverty of the flora. 
. The preponderance of Abyssinian genera and species. 
. The considerable proportion of European plants. 
. The paucity of South-African genera and species. 
. The great rarity of new genera. 
6. The absence of St. Helena types. 
Upon each of these propositions I have a few general remarks to 
offer. 
1. In the poverty of its flora the Cameroons range, &c. seems 
to partake of the characteristics of the Abyssinian Alps. We 
know far too little of the physical geography of either of these 
districts to hazard many conjectures upon this point, which must 
to a certain extent be dependent on the arid volcanic nature of the 
soil and the limited area of the temperate region. Mr. Mann 
spent many weeks, and at various seasons, in his explorations, and 
yet 237 flowering plants were all that rewarded his toil. Geolo- 
gical causes have probably had, in the case of the Cameroons 
Mountains, much to do with the dearth of species, some parts of 
the range even now presenting evidence of subterranean heat. 
2. The preponderance of Abyssinian forms is proved by almost 
all of the genera and half the species being natives of Abyssinia, 
and by many other species being very closely related to, or obvious 
representatives of, plants of that country. There are, further, 
several of the genera and many of the species peculiar to A byssinia 
and the peaks of Biafra. 
3. The number of European genera amounts to 43, and species 
to 27, by far the greater part of which are British ; and a few of 
them, as Radiola Millegrana, have not been found previously any- 
where in the African continent*. Very few of them extend into 
South Africa. The greater part are Abyssinian; the remarkable 
exceptions being Radiola, Scabiosa succisa, Luzula campestris, and 
* Since this Paper was read, I have been informed by Mr. Munby that he 
has found Radiola Millegrana in one spot in Algeria. f 
Om & b 
