570 
EXPLANATION OF THE PLATES. 
Fig. 8. Coiled up embryo of Basella rubra : a, radicle ; h, cotyledons. 
Fig. 9. Vertical section of the seed of Mesembryanthemum crystallinum ; a, 
albumen ; h, radicle of the embryo. 
Fig. 10. Anatomy of the grain, and germination of Scirpus supinus ; after 
Richard. — A, Vertical section: a, albumen; b, embryo. — B, The embryo 
extracted, enlarged, and halved vertically : a, cotyledon ; 6, 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 the 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 
tw’o 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, albumen ; b, back 
cotyledon ; c, front ditto ; d, radicle ; e, plumula. 
Fig. 16. Embryo of Ruppia maritima; after Richard: a, plumula; 5, coty- 
ledon. 
Fig. 17. Vertical section of the seed of Pekea tuberculosa; after Richard: 
a, radicle ; 6, collet ; c, cotyledons. 
Fig. 18. Embryo and ruminated albumen of Eupomatia laurina (a vertical sec- 
tion) ; after Ferdinand Bauer. 
Fig. 19. Spiral twisted embryo of Cuscuta europaea. 
Fig. 20. Half the embryo of a bean (Vicia Faba) ; after Mirbel : a, one of the 
cotyledons ; b, plumula ; c, radicle ; d, scar from which the other cotyledon 
has been cut. 
Fig. 21. Germination of Lachenalia serotina: a, albumen ; 5, cotyledon ; c, 
plumula; d, radicle. 
Fig. 22. Germination of Calla aethiopica ; after Mirbel : a, exterior elongation 
of the cotyledon ; b, seed ; c, front leaf of the plumula ; d, radicle. 
Fig. 23. Germination of Allium Cepa : a, albumen ; b, embryo elongated beyond 
the testa. 
Fig. 24. The same further advanced : a, seed ; b, base of the cotyledons ; c, 
radicle or young root ; d, plumula. 
Fig. 25. Germination of Baptisia australis; after De Candolle : a a, cotyledons. 
Fig. 26. Germination of Cercis Siliquastrum; after De Candolle: a a, cotyledons. 
Fig. 27. Thecae, or Sporangiola, of Erysiphe adunca ; after Greville. 
Fig. 28. Sporules of Phascum crassinervium ; after Greville. 
Fig. 29. Asci, or Thecae, of Sphaeria tubaeformis ; after Greville. 
Fig. 30. Thecae of various Lichens ; after Von Martins, 
