xii BOTANY. ee 
The embryo either occupies the whole of the seed-cavity, in 
exalbuminous seeds (Figs. XLVI and XLVII), or it lies in or in con- 
Fig. XLV.—Albuminous seeds: 1, of Moonseed; 2, of Chenopodium, each 
with a curved embryo; 3, of Marsh Marigold (Caltha) with minute straight 
embryo. 
tact with the endosperm, in the albuminous seeds (Fig. XLV). 
It is straight—e.g , the pumpkin; or variously curved and folded 
—e.g., in Erysimum, where the cotyledons are incumbent, i.c., 
with the little stem folded up against the back of one of the 
cotyledons, and in Arabis (Fig. XLVI), where they are accumbent, 
i.e., with the little stem folded up so as to touch the edges of 
the cotyledons (Fig. XLVII.) 
2 
Fig. XLVI —Incumbent cotyledons of Erysimum: 1, longitudinal section of 
seed; 2, cross-section of seed. 
2 
Fie. XLVII.—Accumbent cotyledons of Arabis: 1, longitudinal section of 
seed; 2, cross-section of seed. 
