306 



PHARMACEUTICAL BOTANY 



upright, in epiphytic types, often forming pseudobulbs. Leaves 

 alternate, entire, parallel-veined, sheathing at base, rarely reduced 

 to yellowish or pale scales in saprophytes. Flowers irregular, usu- 



FIG. 169. Zingiber officinale. (Sayre.) 



ally attractive, entomophilous, arranged in elongated spikes or 

 racemes, trimerous. Sepals, three usually similar; petals three of 

 which two often resemble sepals, third is variously, often greatly 



