376 _PRINCIPLES OF BOTANY, ETC. 
Rhododendrum ponticum. Rhododendrum maximum. 
Rhus Coriaria. Rhus typhinum. 
Ribes nigrum. Ribes floridum. 
Rubus fruticosus. Rubus occidentalis. 
Sambucus nigra. — Sambucus canadensis. 
Styrax officinale, Styrax /aevigatum. 
‘Lhuja orientalis. Thuja occidentalis. 
Tilia europea. Tilia americana. 
Ulmus pumila. Ulimus americana. 
Viburnum orientale. Viburnum acerifolium. 
Cc, Fc. 
Between the shrubby plants of the Cape of Good 
Hope and New Holland a great similarity likewise 
prevails, May not a certain correspondence of the 
soil or the situation of these countries, at the tame 
when organic bodies were beginning to be formed, 
have produced this great similarity ? 
In cold climates a great number of cryptogamic 
plants are found, especially fungi, algae, and mosses, 
Tetradynamic plants, Umbellatae, Syngenesiae, and, 
in general, few trees and shrubs. In warm climates, 
on the contrary, trees and shrubs, filices, twining 
under shrubs, parasitic plants, lilies, Scitamineae, 
(§ 142), are in greatest abundance. Herbs, pe- 
rennial and annual, grow there during the rainy 
season only. Pinnate and nerved leaves occur more 
in those warm countries than in others. 
Aquatic plants have, as long as under water, fine 
filiform leaves, whick, however, as soon as they 
reach the surface, become broad, round, and at their 
base more or less laciniate, | | 
Plants 
