1902] Harper, — Lycopodium clavatum and its Variety 101 



have a chance to observe the relative abundance of the two forms. 

 In my specimens the spikes of the variety were more mature than 

 those of the species, showing that there is some difference between 

 them in the time of fruiting. Or possibly the two-spiked peduncles 

 were a late growth like that mentioned by Dr. Robinson in his note 

 above cited, but as far as I was able to observe they were always on 

 different plants. 



Little Wachusett seems to be the southernmost station at which 

 this variety has been collected. The altitude of the point at which 

 my specimens were secured is about 1300 feet. 



The original description of Lycopodium clavatum, var. monostachyon 

 Greville and Hooker (Hot. Misc. 2 : 375, 376; 1831) contains the 

 following remarks : 



"The whole plant is more compact, the leaves less dentato-ciliate, 

 and less closely imbricated : the spikes solitary in all the specimens, 

 and supported on a peduncle scarcely more than an inch in length." 



This does not exactly describe the New England plant, but as the 

 original specimens came from the Rocky Mountains, in latitude 56 , 

 they were probably dwarfed by the arctic-alpine conditions. There 

 is another note on this plant in the next volume of the same maga- 

 zine (p. 105.) 



A specimen in the herbarium of the New York Botanical Garden, 

 collected by R. S. Williams near Lindeman, Yukon Territory, May 

 4, 1898, corresponds fairly well with the original description. 

 There are no other specimens referable to var. numostachyoti in this 

 herbarium or that of Columbia University, but in the U. S. National 

 Herbarium I find the following which I would refer here : 



Mingan, Southern Labrador, Wm. Palmer, Aug. 17, 1887 (two 

 sheets). 



Benjamin Hill, Winchendon, Mass., C. L. Pollard^ Sept. 3, 1895. 



Saskatchewan River, Kennicott (no date). 



Lake Superior (without further data). 



The last two specimens are mounted on the same sheet, and both, 

 especially the latter, have rather short peduncles. 



Pursh seems to have been acquainted with our plant, but he assigns 

 no definite locality to it. In his description of L. clavatum (Fl. Am. 

 Sept. 652. 1814) he says: "It sometimes has only one spike." 



While on the subject of Lycopodium clavatum it might be of inter- 

 est to note that while this species is not rare in dry woods in South- 



