— 
= 
FLORA OF TIBET OR HIGH ASTA. 257 
P. nivea, Sedum Rhodiola, Saxifraga Hirculus, Leontojodium 
alpinum, Saussurea alpina, Taraxacum officinale, T. palustre, 
Androsace Chamejasme, A. villosa, Gentiana tenella, Pedicularis 
Ederi, Polygonum viviparun, Salix Lapponum, Carex incurva, 
C. rigida, C. ustulata, Scirpus Caricis, Avena subspicata, Festuca 
valesiaca, Poa alpina, P. nemoralis, P. pratensis. Altogether 
twenty-nine species, and rather less than ten per cent. Adding 
the following eleven subalpine species — Ranunculus aquatilis, 
Stellaria graminea, Potentilla Anserina, Hippuris vulgaris, 
Myriophyllum cverticillatum, Polygonum Bistorta, Potamogeton 
pectinatus, Triglochin palustre, Atropis distans, Deschampsia 
cespitosa, and Phragmites communis—brings it up to nearly 
fourteen per cent. But it will be seen at once that they are all 
plants of wide distribution, so there can be po question abvut 
special affinities or connections between the two floras. 
The plants common to the Arctic regions and Tibet are 
forty-seven in number, and of these forty-one are of very wide 
distribution, and thirty-four of them are included in the above 
list as extending to the Alps. The species not common to the 
Alpsand the Arctic regions are :—Clematis alpina, Myriophyllum 
verticillatum, Leontopodium alpinum, Androsace villosa, Scirpus 
Caricis, and Festuca valesiaca. Curiously enough, each of these 
plants is peculiar in its distribution, as may be seen by consulting 
the table showing the general distribution of the Tibetan plants. 
Clematis alpina extends eastward to China, but misses the 
Himalayas. Leontopodium alpinum has the same eastward 
distribution and also oceurs in the Himalayas; and the genus 
Leontopodium has its greatest concentration in China, where 
there are several very distinct and elegant species. But we 
need not pursue this investigation any further, because these 
are clearly just vicissitudes of distribution. 
The material for comparisons offered by our table is by no 
means exhausted; but all comparisons lead to such very obvious 
conclusions, that we do not propose extending them beyoid 
a short list of species not found in the Himalayas. 
