Leguminose.] THE HIMALAYAN MOUNTAINS. 19] 
differed so much in their nature from the Indian Phaseolee, as to be cultivable only in 
the cold weather; and were the only ones of the tribe which succeeded well in the 
Mussooree Experimental Garden. That many of the same species and varieties of the 
Phaseolee, are cultivated in the southern as in the northern parts of India, and that 
there is considerable uniformity in their characters, is evident from my specimens of 
cultivated Phaseolee, named from Dr. Roxburgh’s MS. descriptions, corresponding in 
every respect with those contained in his Herbarium, as I ascertained in company with 
Dr. Graham. Arachis hypogea, from China or Africa, is also cultivated in India. 
Hence we may also expect, as in other families, to find many of the plants of Bengal, 
and Southern India, extending to Northern India: accordingly in the Deyra Doon and 
Kheree jungle we have such plants as Crotalaria tetragona, retusa and sericea, Psoralea 
corylifolia, Pueraria tuberosa, Dumasia villosa, Smithia sensitiva, Mucuna pruriens and 
monosperma, Desmodium gyrans, Dicerma pulchella, and Uraria lagopus ; with shrubs 
and trees like Tephrosia candida, Butea superba, Erythrina spathacea?, Pongamia glabra, 
Dalbergia ougeinensis and Sissoo. Pterocarpus, a genus which occurs chiefly in the 
southern parts of India, is mentioned by Dr. Govan as occurring about Nahn, but I was 
never fortunate enough to meet with it. At Saharunpore and in the open plains there 
are such plants as Heylandia latebrosa, Indigofera enneaphylla, Sesbania Angyptiaca and 
aculeata, Agati grandiflora, Butea frondosa, A’schynomene aspera and aculeata, Uraria 
picta, with several species of Alysicarpus. 
_ The neighbourhood of Delhi, and the arid banks of the Jumna, as we have frequently 
seen, enjoy a peculiarity of vegetation, which approximates their flora to that of the 
drier parts of the peninsula, as among the plants found may be enumerated Indigofera 
_ cordifolia and trita, Rhynchosia medicaginea and microphylla, Tephrosia diffusa and pur- 
purea. The existence also of A/hagi maurorum, with Indigofera paucifolia, and a species 
of Crotalaria, C. Burhia, Hb. Ham., (C. arida, nob.) nearly allied to C. Thebaica, shews 
the relation which has frequently been pointed out in the flora of this part of India to. 
that of Egypt. 
__ The greater proportion, however, of the species of the genera which have been enu- 
merated, as well as those of Galactia, Ormocarpum, Stylosanthes, Lourea, and Eleiotis, 
are found, as might be expected, in the southern parts of India; for the great majority, 
as Crotalaria, Psoralea, Indigofera, Clitoria, Galactia, Glycine, Tephrosia, Sesbania, 
Zornia, Stylosanthes, A’schynomone, Uraria? Desmodium, Rhynchosia, Phaseolus, Dolichos, 
Erythrina, and Pterocarpus, are common to India, with the equinoctial parts, both of 
Africa and America ; in each a few species of some of the genera extend northwards, 
as we have seen them do in India, whenever local circumstances produce a climate 
favourable for the growth of tropical plants. A progress which may be restrained either 
by the intervention of an ocean or a mountain range, and in both cases by reducing the 
temperature, or in the latter by preventing the progress of the tropical rains; so that 
tropical vegetation may be indicated on the map by a series of undulating or zig-zag 
lines, in the same way as has been done by the illustrious Humboldt for the lines of 
equal _ 
