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; 
cot, 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 
