222 LEMNACB&. 
3. Frond laid open over the flower and young frond, shew- 
ing that these originate from the same spot, in opposite 
directions. The elevated line a, corresponds to the 
emargination, and to the conical point, from opposite the 
point of the origin of the above, arises the radicle. 
4. Flower. 
5. Do., with two stamina which are always unequally de- 
|. veloped. 
6. Stamen before dehiscence. 
7. Do., after dehiscence. 
8. Pollen M. 800. 
9. Youngish ovule. 
9a. Same, testa laid open. 
10. 
Ovule at time of impregnation, or dehiscence of anther. 
10a. Same testa divided. 
iL 
Young seed, a testa, b nucleary tegument with its 
caplike apex, c albumen, d embryo, e plumula. ` 
11а. plumule separated, no frondule yet visible M. 3-400. 
112. Capof nucleus M. 3-400. 
12. 
Farther advanced. 
12a. Long section same figures have same references. 
125. Embryo separated. 
12c. Plumule, young frondule just developing consisting 
13. 
14. 
of a single cell. 
Capsule after escape of seed. 
Capsule halved to shew the seed. 
14a. Seed, a raphe, 4 micropyle. 
145. Nucleary membrane of do, 
14c. Embryo. 
144, Do., viewed on one face, and as an opaque object. 
