310 
nosperms are homologous and most probably also with 
those of the Angiosperms. 
2. The integuments are not homologous with the 
indusia of the Ferns and Lycopods, and the first name 
may not be used for these organs. 
3. The integument is originally composed of units. 
4, The value of the units is not yet quite certain. 
