532 



MANUAL OF BOTANY 



Trichogyiie, 37, 50, 70, 82 

 Trypsin, 456, 457 

 Tiillen=thyloses 

 Turgescence, 413 



Uredospores or uredogoni'lia, 



Vacuole, formation of, 410 

 — contractile, 508 

 Yallecular cavities, 151 

 Varieties or sub-species, 2 

 Vegetative reproduction, 512 



in Cyanopbyceee, 39 



• — Lichens, 97 



Fungi, 73 



Liverworts, 105, 110 



— Mosses, 116 



— Pteridophyta, 125 



Velum partiale, 91 

 ^ universale, 92 



Vernation. The arrangement of the 

 foliage leaves in the bud 



Xanthophyll, 441, 464 

 Xerophilous plants, 480 



Zooaenoaite. A free-swimming eoeno- 

 cyte, 59 



Zoogloea, 75 



Zoo(jonidia or zoospores. Asexual repro- 

 ductive cells with ciUa biit no cell- 

 wall 



Zoophilous, 519 



Zygomorphic flowers. Those which can 

 be divided into two preciseh* similar 

 halves by a vertical section in one 

 plane only 



Zygospore. The body produced by the 

 coalescence of two similar gametes 



Zyjote. The body produced by the pro- 

 cess of fertilisation or conjugation. 

 It may be a zygospore or an oospore 



