DIMENSIONS OF SEEDS. 451 



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



rig. 341.— Mangrove Tree (RMzoplwra Mangle). 



• Branch with flowers and fruits (reduced). 2 single fruit, the apex of which is being penetrated by the radicle of the embryo. 



(After Baillon.) 



Oonopsea 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- 



