Species of Lycopodium of North America 157 



longer (io-i I mm.), more gradually tapering and similar to those 

 of the last species. 



A number of mature specimens we have seen lead us to be- 

 lieve that the reflexion of the sporophylls at maturity is a con- 

 stant feature in this species, but not in L. pinnafum. Further field 

 observations are necessary to establish or refute this belief. 



Specimens have been examined as follows : 



W 



J 



A 



Austin 



Delaware : 



W. M 



North Carolina: Hendersonville, Sept., 1898, Biltmore 

 Herb., 595 A (Y) ; Wilmington "in Dionaea savannah/' June 25, 

 1890, F. V. Coville (N). 



South Carolina : Santee Canal, Sept., Ravenel (G). 



Mississippi: Ocean Springs, June, 1896, L. M. Underwood 



<C), R S. Earle, Aug., 1889 (U) ; Biloxi, Aug., 1898, S. M. 

 Tracy (U). 



Alabama: Spring Hill, Aug., 1897, B. F. Bush, 153 (YN). 

 Georgia : Lowndes Co., June, 1895, J. K. Small (C) ; 1840, 

 A. Gray (C). 



. Florida: Jacksonville, " moist pine barrens," Nov., 1894, A. 

 H. Curtis, no. 5357 (C) ; Lake Co., Aug., 1894, G. V. Nash 

 (N, C) ; S. Fla., Chapman (N, C) ; Appalachicola, Aug., 1891 



Chapman- (N, G) ; Hibernia, March, 1869, W. N. Canby (G) \ 

 T. W. Webster (Y). 



The stems of the four species just described differ not a little in 

 certain details of stem structure. Certain features they all possess 

 in common with one exception, noted below ; these are more es- 

 pecially the gum canals and air spaces which occur in the cortex. 

 A single gum canal occurs on the outside of each leaf trace, and 

 . runs up into the leaf. The air spaces are irregular schizogenous 

 • cavities in the cortex; they are very small, are few in num- 

 ber in L. inundatum and are absent in Z. pinnatum ; in L. adprcs- 

 sum they are more numerous and larger than in L. inundatum, 

 while in Z. alopecuroides they attain their maximum development 

 both in size and number. Indeed, the cortex in this handsome 

 plant is little more than a honeycomb, the walls of which are com- 



