440 PHARMACEUTICAL BOTANY 



Vertic'illate. Whorled. 



Vessel. See trachea. 



Villose'. Covered with soft, thin, rather straight hairs. 



Virides'cent. Greenish. 



Vis'cid. Sticky. 



Vitta. An oil tube in the fruit of an Umbelliferous plant. 



Vol'va. The swollen base of the stipe in some toadstools. 



Xy'lem. That portion of a fibrovascular bundle which contains wood cells and 

 fibers. 



Zob'gloe'a. A gelatinous mass of bacteria. 



Zo'ospore. A ciliated spore having the power of movement.] 

 Zyg'ospore. A spore resulting from the union of two like gametes.! 

 Zy'mogen. A microorganism capable of producing fermentation. 



