394 SIB J. D. HOOKER ON THE PLANTS OF THE 



to Guatemala and the Jamaican mountains, N. lat. about 15°. 

 In Africa the J. procera was found by Schimper in the Tigre 

 mountains in N. lat. 14°. Having regard to the comparatively 

 low elevation of the Lykipia forest and its equatorial position, it 

 is evident that a little downward extension of the range of Juni- 

 perus would constitute it a tropical genus. 



2. The Southern or Temperate South- African 'Element. — There 

 are 35 genera in the above collections which are represented in 

 South Africa, some of which there obtain their maximum, or are 

 even almost peculiar to that region. The most notable of these 

 are all those mentioned above as northern, with the exception of 

 Delphinium, Artemisia, Fchinops, Swertia, Bartsia, and Juni- 

 perus. And of other southern types there are the species of 

 Sparmannia, Calodendron, Psoralea, Alepidea, Felicia, Tripteris, 

 Osteospermum, Berkeleya, Lightfootia, Blaeria, Selago, Struthiola, 

 Podocarpus, Aristea, Gladiolus, and Kniphqfia. Of these, Felicia, 

 Osteospermum, and Alepidea had not been previously found 

 north of the Tropic of Capricorn. One species of Clematis is 

 identical with the Cape C. Thunoergiana, as is the Calodendron 

 with C. capense, and the Alepidea with A. amatymbica ; and the 

 Anemone is very near A. capensis. Of the rest most have repre- 

 sentatives in Abyssinia or the mountains of Western Equatorial 

 Africa. 



No less than 15 of these South-African genera appear to 

 be absent on the mountains of Western Equatorial Africa; 

 they are:— Anemone, Calodendron, Psoralea, Alepidea, Felicia, 

 Tripteris, Berkeleya, Lightfootia, Erica, Selago, Leonotis, Stru- 

 thiola, Aristea, Gladiolus, and Kniphqfia. 



On the other hand, the mountains of the Gulf of Guinea 

 contain many South-African genera not hitherto found in the 

 Eastern equatorial mountains. Amongst the most notable of 

 these are Anthospermum, BZieraciwm, Ilex, Lasiosiphon, Peddiea, 

 Geissorhiza, and Hypoxis. 



3. A Comparison of the Eastern with the Western Mountain 

 Vegetation can only be profitably undertaken when the flora of 

 the former is as diligently gleaned as was that of the latter by 

 Mr. Mann ; and we may hope for contributions towards this 

 end from Mr. Johnston's exploration of Kilimanjaro. It is, 

 however, worthy of remark, that of the genera found in the 

 east and not hitherto in the west, the majority are of either 

 Abyssinian or South-African types, whilst the compensating wealth 



