292 



ANNALS OF, THE MISSOURI BOTANICAL GARDEN 



[Vol. 6 



INOCULATED JUNE 6, 1916. 

 IN NORTH AMERICAN 

 20-30 CM.; BELOW THIS 



SERIES E 



SAMPLE FROM MISSOURI BOTANICAL GARDEN, HOLE 

 TRACT. NATURAL FORMATION; BLACK HUMUS TO 

 CLAY TO VERY FINE CLAY; DEPTH LIMIT 80 CM. 



Ser. 

 E 



Depth 



Sept. 15, '16 



E 



Surface 



E' 



E 



// 





Surface 



Surface 



4 



40 cm. 



4' 



40 cm. 



5 



50 cm. 



5' 



50 cm. 



6 



6' 



60 cm. 



60 cm. 





7 



7' 



70 cm. 



8 



70 cm. 



80 cm. 



1 



10 cm. 



1' 



10 cm. 



2 



20 cm. 



2' 



20 cm. 



3 



30 cm. 



V 



30 cm. 







Dec. 16, '16 



Mar. 29, '17 



Nov. 16, '18 



Protoderma tir- 

 ide 



P. viride 



P. viride 



P. viride 



P. viride 



P. viride 

 Ulothrix varia- 

 bilis 





P. viride 

 U. variabilis 



P. viride 

 U. variabilis 



Diatoms 



P. viride 

 U. variabilis 

 Cladophora sp. 



P. viride 



P. viride 



P. viride 



P. viride 

 U. variabilis 



P. viride 

 U. variabilis 





P. viride 



P. viride. 



P. viride 



P. viride 



P. viride 



P. viride 



P. viride 



P. viride 



P. viride 





P. viride 



P. viride 



P. viride 



P. viride 



P. viride 





P. viride 



P. viride 



P. viride 



P. viride 



