THE SEEDS OF GYMNOSPERMS. 



439 



the cone; in the Cypress and other Cupressine», on the other hand, towards the 

 free margin of the scale (figs. 337^'*'^), and away from the axis of the cone. 



In several species, as in the Stone Pine {Pinus Pinea) and the AroUa Pine 

 (Pinus Cembra), the seed -coat attains a thickness of 1^ to 2 millimetres, so that 

 the seed resembles a nut in appearance. Both these species, indeed, serve as an 



4M. 



Fig. 333. — The Lotus Lily (Nclumbiuin speciosuni) (Fioiii a iihutnyraph.) 



article of diet, being eaten like nuts. The seeds of Pines and Fir-trees are provided 

 with a one-sided wing (c/. figs. 335^'*'^) which plays an important part in their 

 dispersal by wind. In the Maidenhair Tree (Gingko biloba) the integument of the 

 seed becomes succulent and coloured a bright orange, so that the seed in a way 

 resembles a drupe (cf. tig. 337 '^). In Gycas revoluta, also, the integument becomes 

 red and fleshy (cf. fig. 208 \ p. 74) 



