THe OccuRRENCE OF More THAN OnE LEAF 
IN OPHIOGLOSSUM. 
It is usually stated that in the Ophioglossales one leaf develops each year. 
In collecting material of Ophioglossum vulgatum near Gary, Ind., during 
the summer of 1914, it was observed that there was a large proportion of plants 
with more than one leaf, so a count was made. Of a total of two hundred 
plants, selected at random, ninety-one had one leaf above ground, one 
hundred and five had two leaves, and four had three leaves. A similar pro- 
portion was found the same year in plants collected in a wood adjoining 
the Earlham College campus. Material collected during the summers of 
1913 and 1915 showed few plants with more than one leaf. 
M. S. Mark ie. 
Earlham College, 
Richmond, Ind. 
