357 



The Occuerence 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 coUected 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. Markle. 

 Earlham College, 



Richmond, Ind. 



