248 MR. W. B. HEMSLEY ON THE 
Regions, 
_ SS | Tr — i _ — —— 
BL 
: : = | | 
| = 
2/|& = | . 
Pinner Bl) os) ¢ | 8 | Of wider 
(BET. 2/6) 2)2)2 3) .8 | Distribution. 
2/7 B/E 2 Sis) 
HFlS 2/2/85 Sie. 
Ria lOlnia A | =< | 
—_—_—_—_ — —_-—---—— —_— —_—__-- —— |(— ——'!- [| ee —_ —— -—~— 
272 207/99 73) M4 G2) 46) 4 54 
40. GraMinE® (continued). | | | 
Poa alpina. .......0.0......cece eens x» | « | # |...) .. | * | *  N, Alp. Regions. 
», attenuata oo... eee * a * ) * } . 
» nemoralis ...................4. * * x | # . * x | N. Temp. Regions. 
yy pratensis .............. eee * * * i * * | ” ” 
» tibetica oe. * | | 
Stipa Hookeri .....0.......00..2... * | 
yy mongolica..................00.. ee ba. | | | 
» OYVientalis .........00.00000.0.. * * * * | * | | 
yy purpurea ...... ee. x | * we | | 
SibITICa Lee x | x | « | * | * | 
| 
41. Fivicns. | 
Polypodium hastatum ............ eee fee | # | 
Total nuinber of the 283 Tibetan | 
species extending to each | 
VEGION.. eee ceeeceeeeeeeeeeeeees | 217) 107) 79 | 99 | 66 | 49 | 47 oT 
Approximate percentage of the’ | 
283 Tibetan species extending | | 
to each region .........cccc00e | 766) 88-1) 27-9) 35 | 233, 17°38) 16-2, 20°1 
| 
ANALYSIS AND DiIscussION OF THE TABLE. 
The foregoing table comprises 283 species of vascular plants 
belonging to 119 genera and 41 natural orders. As pointed out 
elsewhere, these totals can only be regarded as approximations ; 
yet it seems probable that these 283 species of plants constitute, 
or nearly so, the entire flora of Dry Tibet. The uniform com- 
position and smallness of the collections, coupled with the fact 
that the various explorers traversed the country in the most 
distant longitudes and latitudes, favour this view, which is also 
supported by the independent observations of the collectors 
themselves. Considering that the country stretches across about 
twenty degrees of longitude, by ten degrees of latitude, the 
