248 



HEREDITY AND EVOLUTION IN PLANTS 



oLUBMOssza Eoassiins 



(lapldo- 

 phyta) 



11 



(Calaao- 

 phyts ) 



(Ftarldophyta 

 Id restrloted 



SUED iJdSfS 

 (Sponoatopbyta) 



Lower 

 Gynuo— 

 Bparms 



1 



Higher 

 Gymno- 

 Bperms 



Angto- 

 eperma 



15 



«' 



Seed 

 nake 

 eper 

 oi 1 



dl 

 m |8 

 lated 



I 



Seeds 



e&aloBed 



apersiB 



not 



oillftted 



nalce'd. 



eperliDB 

 hot- 



Stem with 



rldgee & 



JotntB, 



leaveB 



nhorled , 



Bporejigla 



aeveral 



LeaveB amall. 

 sporangia on 

 upper Bide, 

 woody cylinder 

 oontinaoua 



LTCOFSIDJ, 



Euapor- Lepto- 

 angiate aporan- 

 giata 



Wittaont aeeda 



LeaTea large, 

 aporangia on 

 tuder aide, 

 woody oylinder 

 with fo-llar 

 gapa 



PTEHOPSIDA 



Buaporan' 

 giate 



I living plantB 

 I well known foeail planta 

 I foasila of doubtful affinity 

 •f- exoluBlTely foaall groupa 



UAIH QROUFd OF TASCUIAR FLAHT3 

 Their apparent affinltiea and approzlJiiate geologioal diatrihution 



Fig. 112. 



