560 
EXPLANATION OF THE PLATES. 
matic tissue through which the fertilising matter is conveyed, and to which the 
foramen is closely applied ; e, the bundle of vessels that communicates with the 
umbilicus ; fy the commencement of the raphe. 
PLATE VL 
Fig. L A, Vertical section of the seed of Canna lutea ; a, albumen; b, embryo. 
— B, Embryo extracted and divided vertically ; a, cotyledon ; b, plumula con- 
cealed within the embryo ; c, radicle, with internal rudiments of roots. 
Fig. 2. A, Vertical section of the seed of Myrica cerifera ; a, cotyledons ; 
b, radicle ; c, plumula ; d, remains of foramen ; e, hilum. — B, Embryo, ex- 
tracted entire ; a, cotyledons ; b, radicle. 
Fig. 3. Vertical section of the seed of Luzula campestris ; a, albumen; 
b, embryo. 
Fig. 4. Vertical section of the grain of Bromus mollis ; a, albumen ; b, embryo ; 
c, its plumula ; rf, its cotyledon ; e, its radicle, with internal rudiment of a 
root. 
Fig. 5. Vertical section of the seed of Rheum rhaponticum ; a, albumen ; 
b, embryo ; c, hilum ; d, remains of foramen. 
Fig. 6. A, Seed of Triglochin palustre ; a, fungous chalaza ; 6, raphe; c, 
hilum. — B, Embryo of the same ; a, cotyledon ; b, radicle ; c, fissure, 
within which the plumula lies. — C, The same halved vertically ; a, cotyledon ; 
b, radicle ; c, fissure ; d, plumula. 
Fig. 7. A, Seed of a species of Begonia; a, hilum. — B, The dicotyledonous 
embryo. 
Fig. 8. Coiled up embryo of Basella rubra; a, radicle ; b, cotyledons. 
Fig. 9. Vertical section of the seed of Mesembryanthemum crystallinum ; a, al- 
bumen ; b, radicle of the embryo. 
Fig. 10. Anatomy of the grain, and germination of Scirpus supinus, after 
Richard. — A, A vertical section ; a, albumen ; b, embryo. — B, The embryo 
extracted, enlarged, and halved, vertically; a, cotyledon; b, radicle. — C, The 
seed germinating and halved; a, albumen ; b, cotyledon ; c, plumula; d, young 
root ; e, sheath of the latter. 
Fig. 11. A, Seed of Ribes rubrum ; a, chalaza; b, raphe ; c, hilum. — B, The 
same, halved vertically, showing the minute embryo, with two spreading coty- 
ledons lying at the base of tlie albumen ; b, section of the raphe ; c, hilum ; 
d, albumen. 
Fig. 12. Embryo of a species of Mammillaria ; the cotyledons very small. 
Fig. 13. Embryo of Geranium Robertianum ; a, radicle; b, line of union of the 
two cotyledons ; c, one of the plaits in the latter. 
Fig. 14. Section of the seed of Alisma Damasonium, after Mirbel ; a, cotyledon ; 
b, radicle ; c, plumula. 
Fig. 15. Part of the seed of Olyra latifolia, after Richard; a, all)umen ; b, back 
cotyledon ; c, front ditto ; d, radicle ; e, plumula. 
Fig. 16. Embryo of Ruppia maritima, after Richard; a, plumula ; b, coty- 
ledon. 
Fig. 17. Vertical section of the seed of Pekea tuberculosa, after Richard; 
a, radicle ; b, collet ; c, cotyledons. 
Fig. 18. Embryo and ruminated albumen of Eupomatia laurina, after Ferdinand 
Bauer (a vertical section). 
