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 to a flower in which the parts in one or more 



sets are not similar ; irregular. 229. 

 ZYGOTE : the sexual spore resulting from conjugation. 15. 



