GLOSSARY 335 



Testa : the hard coat of the seed. 184. 



Tetracyclic : applied to a flower whose four floral organs are in four 



cycles. 268. 

 Tetrad : a group of four spores produced by a mother-cell. 103. 



Zoospore : a motile asexual spore. 10. 



Zygomorphic : applied lu a fluwur iu which the parts in one or more 



sets are not similar ; irregular. 22'J. 

 Zygote ; the sexual spure resulting from conjugation. 15. 



