DIMENSIONS OF SEEDS. 45 1 



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



Fig. 341.— Mangrove Tree (Rhizophora Mamjle). *-^ 



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



(After Baillon.) 



Conojpsea 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- 



