384 



EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



ous parietal placentae, from which the valves often separate in de- 

 hiscence. Seeds numerous, with a minute embryo, and copious 

 fleshy and oily albumen. Ex. The Poppy (Pa paver), the leading 

 representative of this small but important family, is remarkable for 

 the extension of the placentae so as nearly to divide the cavity of 

 the ovary into several cells, and for the dehiscence of the capsule 



by mere chinks or pores under the edge of the crown formed by 

 the radiate stigmas. The Eschscholtzia, now common in gardens, 

 is remarkable for the expanded apex of the peduncle, and for the 

 union of the two sepals into a calyptra, like a candle-extinguisher, 

 which, separating at the base, is thrown off by the expansion of 

 the petals (Fig. 522, 523). The colored juice is narcotic and 

 stimulant. That of the. Poppy yields opium. The colored juice of 

 the Celandine, and of the Bloodroot (Sanguinaria, Fig. 519), is 

 acrid. 



FIG. 519. Sanguinaria Canadensis (the Bloodroot). 520. The pod, divided transversely, 

 showing the parietal attachment of the seeds. 521. Longitudinal section of a magnified seed 

 with its large raphe, showing the minute embryo, near the extremity of the albumen. 

 522 Flower-bud of Eschscholtzia. 523. The calyptriform calyx detached from the base. 

 524. Pod of the same. 



