DIMENSIONS OF SEEDS. 451 



enormously from plant to plant. The seed of the terrestrial Orchid Gymnadenia 



Fig. 341. — Mangrove Tree {Rhizophora Mangle). 



1 Branch with flowera and fruits (reduced). 2 Single fruit, the apex of which is being penetrated by the radicle of the embryo. 



(After Baillon.) 



Conopsea measures 1 mm. in length and weighs ■008 gram: that of the Cocoa-nut 

 Palm 11—14 cm. and weighs 800—1100 grams. The Wind Bent-grass (Apera spica- 



