1 86 GLOSSARY. 



Trichogyne. A hair-like extension from the bulbous portion 

 of the oogonium, found in many red Algae. 



Trichome (a hair). A general name for a slender] outgrowth 

 from the epidermis, usually arising from a single cell. 



Turgidity. The normal swollen condition of active cells which 

 results from the distension brought about by absorption 

 of water. 



Vein. The fibro- vascular bundle of leaves or any flat organ. 



Venation. The mode of vein-distribution. 



Xylem (wood). The wood (inner) portion of the fibro- vascular 

 bundle. 



Zoospore (animal spore). A motile asexual spore. 



Zygomorphic. Said of a flower which can be bisected by 

 only one plane into similar halves. 



Zygophyta (yoke-plants). A primary division of plants, now 

 commonly spoken of as Conjugatae, named from their mode 

 of reproduction, the sexual spore being produced by con- 

 jugation. Zygophyte is the English equivalent. 



Zygospore (yoke-spore). The spore of Conjugatae, formed by 

 conjugation. 



