412 



EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



tary or few ovules : styles often lateral. Albumen none. Em- 

 bryo straight, with broad and flat or plano-convex cotyledons (Fig. 

 457). This important order is divided into four suborders ; 

 namely : 



774. Subord, Chrysobalanecc (the Cocoa-plum Family). Ovary 

 solitary, free from the calyx, or else cohering with it at the base 

 on one side only, containing two erect ovules : style arising from 

 the apparent base. Fruit a drupe. Trees or shrubs. Ex. Chry- 

 sobalanus. 



775. Subord. AmygdaleSB (the Almond or Plum Family}. Ovary 

 solitary, free from the deciduous calyx, with two suspended ovules, 

 and a terminal style. Fruit a drupe (Fig. 447, 448). Trees or 

 shrubs. Ex. Amygdalus (the Almond, Peach, &c.), Prunus (the 

 Plum), Cerasus (the Cherry). 



776. Subord, Rosaces proper, Ovaries several, numerous, or rare- 



FIG. 677. The Strawberry (Fragaria). 678. Half of a flower, divided vertically, from which 

 the petals are removed; showing the perigynous insertion of the stamens, and the enlarged 

 receptacle, which, increasing in size, forms the pulpy, edihle fruit, bearing the achenia, or real 

 fruits, on its surface. 679. One of the carpels magnified, showing the lateral style. 630. Fruit 

 of the Blackberry (Rubus villosus), with a longitudinal section : here the elongated receptacle 

 does not enlarge, but the ovaries become drupes. 631. Section of the endocarp; the cavity of 

 which is filled by the seed, and that by the embryo, with its large cotyledons. 632. A flower 

 of Sanguisorba Canadensis, enlarged. 683. Vertical section of the same in fruit; the solitary 

 ovary inclosed by, but not coherent with, the persistent calyx-tube ; the single seed with its 

 large embryo filling the achenium. 



