Fig 41Q. — Gnrtinn Gncmoii: various phases of the life history; -1 , ovulate strobiius; 

 B, strobiius upon which only one seed has matured; C. longitudinal section of a young 

 ovulate strobiius, X24; D, later stage, showing o\-ules and paraph}sial hairs (//), X45; 

 E, longitudinal section of an immature ovulate flower, showing "perianth" (/>), inner 

 integument (/), rudimentary outer integument (r), and nucellus (;/); F, nucellus show- 

 ing three mother cells; G, longitudinal section of a mature ovulate flower, showing 

 the "perianth" (p), outer integument (0), and inner integument (/), X33; H. embryo 

 sac with free nuclei in a parietal layer, and showing the beginning of the constriction 

 which results in the antipodal and micropylar chambers; /, cell-formalion in the 

 "antipodal chamber," another sac which is being pushed aside is shown at the right 

 abov'e, X50; /, upper portion of sac soon after fertilization, showing a pollen tube 

 with its nucleus (7), oospores (/), and unfe rtili zed eggs, X340; A', embryo sac, showing 

 the suspensor-like de\'elopment of the oospore (^) ad\-ancing toward the "antiiKidal 

 endosperm," X50. — All from Lotsy (15) excepting F, which is after Strasblrger (10). 



