THE BOOK OF EVEKGLEENS. 



The above two varieties illustrate a curious and inter- 

 esting feature in the morphology of leaves. 



According to JBraun, all plants have three distinct sys- 

 tems of foliage, which he calls, 1st, Cataphyllary, 2nd, 



Fig. 43. THUJA OCCIDENTALIS, VAR. ERICOIDES. STATIONARY IN THE 

 CATAPHYLLARY STATE. 



Euphyttary, and 3d, Hypsophyllary ; and represent, 1st, 

 Infancy, 2nd, Youth, and 3d, Maturity. The first sys- 

 tem of leaves, which appear soon after the cotyledons or 

 seed-leaves, form a distinct class by themselves, and in 



