154 THE SCIENCE OF LIFE. 



The Poppy family (PAPAVERACE^E) differs from the last 

 in having the carpels united into an undivided ovary, 



and in having milky or 

 colored juice. Opium is 

 the dried juice of Papavcr 

 somniferum, (Fig. 64,) or 

 Poppy, and its varieties. 

 The Celandine (Chelidoni- 

 um majus] yields an or- 

 ange-colored juice, which 

 is said to be acrid. In the 

 leaf of this plant may be 

 seen under the microscope 

 the movement of the sap 

 in the laticiferous vessels. 

 Sanguinaria canadensis, or 

 Blood-root, has emetic and 

 cathartic properties. The 

 yellow California Poppy 

 (Eschscholtzid) is remark- 

 able for the two sepals of 

 its calyx adhering at the 

 edge, and separating at 

 the base by the growth of 



the ^Wcr SO as tO form 3. 



FIG. 6 4 .-TheOpium-Pla(/'A, W r somni- 



ferum - sort of calyptra, or hood, 



over the unexpanded petals, resembling the extinguish- 

 er of a candle. 



MAGNOLlACEyE, the Magnolia family, contains the well- 

 known Magnolias, remarkable for large odoriferous flow- 

 ers, the Swamp Sassafras, (M. glauca^) whose bark is used 



