PLATE X. 



Nitella spanioclema Groves & Bullock- Webster, 

 no. 



1-8. Fruiting portions of the plant, showing characteristic 

 forms of branches and branchlets, and disposition of 

 a,ntheridia and oogonia. 

 Figs. 1-5. X c. 10. Figs. 6-8. x c. 20. 



