CRYPTOGAMS AND PHENOGAMS 



553 



Fig. 380. — Norway Spruce. Growth of embryo. A, early stage, if«. 

 B, later stage, ^f . C, half-ripe embryo, showing below the protrusions 

 from which the cotyledons are formed, t. D, same, cut vertically. 

 E, .same, end view, showing the eight rudimentary cotyledons surround- 

 ing the stem-tip. F, embryo, fully formed (?), out vertically to show 

 the seed-leaves or cotyledons (c), the seed-stem (h), the beginning of the 

 root (pi), root-cap (cp), fibrovascular cylinder of root (cl), pith of stem 

 (m), and rudimentary fibrovascular strauds (op) surrounding it. 

 (Strasburger.) 



