MIMICRY. 



327 



it is almost impossible to distinguish them from the 

 foliage alone. Others again are nearly identical with 

 some of the larger species of Lycopodiums, crypto- 

 gams allied to ferns and mosses. We have figured 

 one example of a compact composite plant (Azorella 



Fig. 68. — Lycopodium 

 compaction. 



selagd) for comparison with one of the club-mosses 

 {Lycopodium compactiini). Other instances might 

 have been selected from remote families, in which 

 the same resemblance is sustained, so that from the 



