DIMENSIONS OF SEEDS. 451 



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



irig. 341. — Mangrove Tree (Rhizophora Mangle). 



1 fiowerB and fruits (reduced), s 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- 



