364 BOTANICAL GAZETTE [MAY 
LITERATURE CITED 
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1913 
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EXPLANATION OF PLATES XX AND XXI 
(Figs. 1-6 are in the text) 
Fic. 7.—Transverse section of a rhizome of Botrychium ramosum at the 
base of a back: It, leaf trace; X 20. 
1c. 8.—Transverse section of the branch whose origin is represented by 
figs. 4 and 7, showing the two branch steles: a, larger stele of the branch; 
6, smaller stele of the branch; r, trace of root which connects with the smaller 
branch stele; X20. : 
