408 



CAPRIFOLIACE^E 



bark of the mountain maple (Acer Spicatum) was an adulterant formerly 

 described by misled authorities, as Viburnum opulus. 



Powder. Light brown. Characteristic elements: Parenchyma of inner cortex, 

 with rosettes of calcium oxalate; middle bark bearing reddish-brown coloring- 



FlG. 235. Cross-section of bark of Viburnum Opulus (X 43)- A, Cork. B, Cork cambii 

 C, Parenchyma of cortex. D, Phloem. E, Medullary ray. F, Group of stone cell?. 



FIG. 235 a. Viburnum Opulus (Xi37). Group of stone cells taken from F in, Fig."23S. 



matter, starch (5 to 12 n in diam.); tracheal fragments with lignified wood fibers; 

 few stone cells; crystals of calcium oxalate, few aggregate (i5-.to 30 ju in diam.); 

 polygonal cork cells, thin-walled. 



ACTION AND USES. Claimed to be antispasmodic, hence 'the name 

 cramp bark. Dose: 30 gr. to 2 dr. (2 to 8 Gm.). 



