PLATE 21. 



7* 



6 f*-'* 



I % 



1: 



1- 



4 



]() 



Pollen mother cell meiosis at first division in species of section Cilyccria ( • I, ()()()). 

 I'^-J-f^^ "^^^^P^^^^ anaphase in G. fluitans (H430) 2n ^ 40. Metapha.se in G. x ,vc//c-.'//a(d (H4^0) 

 - 40 showing: 10 bivalents; 2 trivalents ; 14 univalents. 4. Anaphase in G. x pedicellata (H4^9) ?n = 40 

 showing : 7 lagging and dividing univalents. .5. Metaphase in (;. c/ec/inata (H413) 2n ^ 20 r,-7 Metapha.se 

 and anaphase in G. p/^caia (H423) 2n = 40. S. Anapha.se in G. p/icatcz (H444) showing : ] quadrivalent 

 9. Metaphase m sterile G. p/^cata (H426) 2n ^- 40, showing : ] 6-valent; 17 bivalents.' 10. Metaphase in 

 sterile G. p/irato(H426) shewing : 1 6-valent; 1 4-valent; 15 bivabnts. 



