498 The Ohio Naturalist. [Vol. XII, No. 6, 



Lycopodium lucidulum. Leaves flattened at their bases and 

 ultimately more or less reflexed. Prostrate portion of stem longer, 

 freqtientlv rooting, curving upward, and dichotomously branching 

 1-3 times to form a loose cluster 4-8 in. high. Margin (of leaf) 

 erose denticulate above the middle 



Lycopodium selago. Leaves hollow at their bases and ap- 

 pressed. Prostrate portion of stem very short, abundantly rooting, 

 soon curving upward and dichotomously branching to form compact 

 tufts {2-7 in. high) of vertically placed branches with dense foliage; 

 leaves more or less appressed, or at least upwardly directed, entire. 



^ig 1 Lycopodium lucidulum, Hocking County, Ohio. 

 JFig! 2. Lycopodium porophilum, Fairfield County, Ohio. Photograph 

 by Forest B. H. Brown. 



The accompanying figures are given as representative speci- 

 mens of the three species. The L. lucidulum was collected ni 

 Hocking countv, while the L. porophilum comes from Fairfield 

 county. L. lucidulum is successively dichotomous in habit at rather 

 regular intervals'; L. porophilum is several times dichotomous in 

 close succession with long unbranched branches. The leaves agree 

 with Llovd and Underwood's descriptions. 



There has been some question as to whether the Ohio forms 

 referred to L. porophilum might not be L. selago. In order to gain 

 an insight into the character of the European L. selago, the speci- 

 mens at the United States Natural Herbarium were studied. 

 Through the kindness of Mr. W. R. Maxon, an English specimen 

 and an Alaskan specimen were loaned to the writer for special study. 



