212 LEMNACE&. 
B. Front view of do. 
C. Ovule of ditto, a testa, b opaque tissue at its base, c 
vessels, d tegmen, e nucleus. 
D. Same, testa removed, a tegumen, б line of composi- 
tion ? c foramenal canal, d nucleus. 
E. Do., (younger) bundles of raphides very common in 
placental tissue. 
F. Same, under pressure. 
H. Very young ovule, a testa, 4 tegmen, c nucleus. 
H l. Same under pressure, the same letters have the 
same references, at d line of composition. 
H. 2. Nucleus of do., separated. 
G. Ovule more advanced from same placenta, nucleus in- 
closed. 
G. a. Do., rather less developed. 
Pistia stratiotes continued Pl. CCLX. Fig. II. 
l. and 2. nearly mature fruit, remains of spatha removed. 
3. Seed nearly ripe, a funicle. 
4. Apex of do. 
5. Long section of do. a testa, 6 membranous tegmen, c 
its concealed apex, covered by the rather thin testa, d 
albumen, e embryo. i 
Albumen removed. 6a, its apex, marked with two 
discs and a central areola which corresponds to the 
radicle of the embryo; the inner disc may represent the 
attachment of the embryonary sac, the outer that of- the 
clea ry membrane, both being ragged. 
‚ Long section of tegmen, a funicle, b tegmen, c its nu- 
apex, d album, e embryo. 
. Embryo in a younger state, shewing the lateral fissure 
now large, a plumule. 
9. Same more advanced, a plumule. 
9a Long section of same, a site of fissure, 6 plumule. 
10. Same more advanced, fissure closed and more elevated. 
10a Same, embryo viewed on its contrary face, 
9 
ag 
eo 
