394 



MORPHOLOGY. 



4. Curved seed-bud, as naked nucleus (fig. 230.), with one (fig. 231.) 

 or with two integuments (fig. 232.). 



232 



230 



5. Semi-curved seed-bud, with one (fig. 233. ) or with two integuments 

 (fig. 234.). 



6. Arched seed-bud, with two integuments (fig. 235.). 



235 



233 



234 



7. Reversed seed -bud, with two integuments and an arillus (fig. 236.). 



8. Doubly-curved seed-bud, with two integuments (fig. 237.). 



9. Wholly abnormal, spirally-curved seed-bud, with two integuments 

 (fig. 238.). 



880 Galium Aparine. Seed-bud in longitudinal section, a, Hilum and chalaza ; 

 6, naked nucleus ; c, embryo-sac ; g, papilla of the nucleus. 



231 Datura Stramonium, a, h, Hilum and chalaza ; 6, nucleus (as a nuclear membrane) ; 

 c, embryo-sac ; d, simple integument ; g, micropyle. 



232 Spergula pentandra. Seed-bud in longitudinal section, a, h, Hilum and cha- 

 laza ; b, nucleus ; c, embryo-sac ; c?, inner, and f, outer integument ; g, micropyle. 



233 Salvia officinalis. Seed- bud in longitudinal section. a, Hilum; b, nucleus; 

 c, embryo-sac ; d, simple integument ; g, micropyle ; h, chalaza ; r, raphe. 



234 Colutea arborescens. Seed-bud in longitudinal section, a, Hilum ; b, nucleus ; 

 c, embryo-sac ; d, inner, and f t outer integument ; g, micropyle ; A, chalaza ; r, raphe. 



235 Galphimia mollis. Seed-bud in longitudinal section a, Funiculus and hilum ; 

 A, chalaza; b, nucleus ; c, embryo-sac ; d, inner, and/, outer integument; g, micro- 

 pyle. 



