LILIACEjE 



23s 



filaments are usually dilated at the base, and the anthers are 

 oblong, and opening inward (dehiscing inward) . The single, 

 superior ovary is imperfectly three-loculed and bears a 



Fig. 92. — Seed and seedling of onion (Allium cepa) . A, seed; B, to/*', suc- 

 cessive stages in the development of the seedling; c, cotyledon; e, endosperm; 

 /, first true leaf; h, hypocotyl; s, slit from which the first true leaf emerges. A 

 considerably magnified. (After Bergen and Caldwell.) 



single filiform style, which may be more or less indistinctly 

 three-cleft at the apex. 



Pollination. — Species of Allium are insect pollinated. The 

 anthers of the flower usually mature before the stigma, al- 



