504 
GEOGRAPHY. 
BOOK V. 
Pfaaenogamous Cryptogamous 
The number of described plants in 1827 was. ac- 
cording to Sprengel, about - - - 
To this may be added for errors, and erroneous sup- 
pressions of species, say _ - - 
Add also for India and the rest of Asia, 
■ -— America _ _ - - - 
' Africa - - - - - - 
77,000 9,000 
That this is not an exaggerated statement in regard to 
America, will be obvious from the following comparison of 
the numbers, in a few cases, of American species admitted by 
Sprengel, and what have since been published by other 
Botanists, 
Number of American species of 
Salvia 99 according to Sprengel, J 66 according to Bentham. 
Hyptis 29 208 
Hydrophyllese 12 40 
Californian Po- "1 ^ ^2 
lemoniaceae J 
Hahenaria R.Br. 31 66 according to Lindley. 
Melastomaceae 235 633 according to De Candolle. 
410 1146 
So that the number appears ah'eady to have been ascer- 
tained to be in these seven cases nearly three times as gi'eat 
as Sprengel supposed. 
The best attempt that has yet been made to group these 
species geographically is by Schouw, from whom we take 
(Linn. vol. viii. p. 6'23..) the following 
NOTES 
FOR A LECTURE OX THE GEOGRAPHICAL DISTRIBUTION 
OF PLANTS. 
I. Kingdom of the Mosses and Saxifrage.!:. 
(Arctic Alpine Kingdom. — JVahlenbergs Kingdom.) 
a. The Polar countries from the ice-limits to the tree-limits 
(Scandmavia, 70^ N. L. Asia, 68^, Kamtschatka, 58^, middle of 
North America, 68°, Labrador, 58°, the polar islands, Greenland, 
Iceland, 60°.) 
31,000 6,000 
6,000 1,000 
10,000^ ■ 
20,000 \ 2,000 
10,000 J 
