Musci.] THE HIMALAYAN MOUNTAINS. 435 
Himalayas, as has Glyphocarpus, of which the other species are found at the Cape of 
Good Hope. Hookeria, frequent in tropical, but rare in temperate regions, has one 
species, H. acutifolia, peculiar to Nepal; but the other, H. rotudata, Sm., is also found 
in the West-Indies, New Zealand, and at the Cape of Good Hope. 
' Genera peculiar to Nepal, but of which only single species have yet been described, 
are [Zymenostylium, Leptohymenium, Regmatodon, and Lyellia: but the genera, to which 
the great mass of the species found in these mountains belong, are those which are best 
known in Europe, and other temperate parts of the world, such as Gymnostomum, 
Grimmia, Orthotrichum, Zygodon, Trematodon, Dicranum, Didymodon, Tortula, Brachy- 
menium, Bryum, Pohlia, Bartramia, Funaria, Polytrichum, Hypnum, Leskea, Neckera, 
Leucodon, and Fissidens. 
_ As we have seen the genera of hot climates prevailing in the southern parts of India, 
spreading into Nepal, and still further north into the Himalayas, and occurring with an 
occasional species of a European genus, so do we observe among the species, the 
prevalence of several which occur in other hot parts of the world, though there are with 
them a great many which are identical with those of temperate climates, as of Europe 
and of the British Isles. This mixture of tropical and European forms, we have seen 
to prevail very frequently even with the genera and species of more highly developed 
forms of vegetation, and which was ascribed to the equability of temperature and of 
moisture of the rainy season during which these anomalies occur. It has long been 
observed by the most distinguished botanists, and among these by Mr. Brown, who 
holds the first rank among them, that the species of the less highly developed forms 
have a very wide geographical distribution. Of this several examples are given in 
the list appended by Mr. Brown to his General Remarks on the Botany of Terra Aus- 
tralis. Many have been adduced in the present work, as well among Phenogamic as 
among Cryptogamic Plants, and a still greater number in proportion to the new species, 
are now to be adduCed from among the true AMosses. | 
The species of Mosses which have been found in Nepal, and the neighbourhood of 
Mussooree in the Himalayas, and which also occur in other, often very distant coun- 
tries where the climate is hot, are Orthodon serratus, Schwagr., Dicranum fragile, Hook., 
Didymodon squarrosum, Hook., which occur in Mauritius ; also Fissidens polypodioides, 
Hedw., likewise found in the West-Indies; as are Bryum coronatum, Schwagr., 
Funaria calvescens, Schwagr., Hypnum flevile, Sm., Neckera cladorhizans, Hedw., 
N. undulata, Hedw., Hookeria rotulata, Sm. Neckera dendroides, Hook., occurs in 
the Sandwich Isles; Hypnum flexile, Sm., and arbusculum, Hook., are likewise 
found in New Zealand; as well as Hookeria rotulata, Sm., and Funaria arborescens, 
Schwagr., in New Holland. The European species, many of them British, and some 
also occurring in N. America, and which have been found in the Himalayas, are 
Gymnostomum rufescens,-Hook., Trematodon longicollis, Rich., Dicranum heteromallum, 
Hedw., sguarrosum and fleruosum, Hedw., scoparium, Hedw., longifolium, Ebrh., and 
glaucum, Hedw., Didymodon purpureum, Hook.?, Tortula angustifolia, Hook., and fallax, 
3x2 Sw., 
