CALAMITES AND LYCOPODS 



The elongation of the embryo-stem (hypocotyl) carries the 

 first leaves (cotyledons) up above the surface of the soil, 

 while at the same time the first root (radicle) is develop- 



FIG. 275. Lycopodium phlegmaria. Development of embryo, st, stem; 

 col, cotyledon; sus, suspensor; R, root. (After D. H. Campbell.) 



FIG. 276. Young sporophyte of Lycopodium cernuum L., with the 

 gametophyte, having irregular lobes of chlorophyll-bearing tissue attached 

 on one side. (After Treub.) 



ing at its base (Fig. 276). If the prothallus is deeply 

 buried the hypocotyl becomes more elongated before the 

 cotyledons are formed. 



341. Vegetative Multiplication. Several species of Ly- 

 copodium bear gemmae. They are conspicuous on 



