Cocks has found immense quantities of this fern about fifteen 

 miles west of New Orleans. 



MARSILIACEJE. 

 Marsilia uncinate A. Br. Abundant along the Mississippi es- 

 pecially in the vicinity of Xew Orleans where it fills the ditches 

 in the outskirts and often completely overruns the streets. 

 SALVIX1ACEJE. 

 Azolia Caroliniana Willd. W ater fern. Exceedingly abund- 

 ant in stagnant pools, thickly covering the surface. 



EQUISETACE.E. 

 Equisetum robustum A. Br. Scouring rush. Common in wet 

 places. 



Equisetum laevigatum A. Br. This is usually credited to Louis- 

 iana and the description of the species is said to have been 

 founded in part upon material from this State; but neither Rid- 

 dell nor Langlois catalogue it, and it has possibly been wrongly 

 referred to Louisiana. _ 



LYCOPODIACE^. 



Ly cop odium alopecuroides L. Fox-tail club-moss. Common 

 in moist spots in the pine barrens. The form called variously 

 adpressum and Chapman* was collected at Lake Charles by S. ML 

 Tracy. Lycopodium inundatum L. has several times been re- 

 ported from the State, but as this is a Northern species it is evi- 

 dent that the form adpressum has been mistaken for it. 



Lycopodium Carolinianum L. Not uncommon in wet pine bar- 

 rens. Collected by R. S. Cocks at Slidell and Ponchatoulas. 



Lycopodium clavatum L. has been reported from the 



State, and there is a sheet of it in the Herbarium of Tulane Uni- 

 versity, labelled. ' Flora of Louisiana, legit Josiah Hale, 1849. " 

 This, however, is far beyond the accepted range of the species and 

 the label is doubtless incorrect. 



SELAGINELLACE.E. 



Selaginella apus Spring. Creeping selaginella. Not uncom- 

 mon in moist places. 



Selaginella Ludoviciana A. Br. Reported from Covington, 

 Mandeville, Pearl River, Ponchatoulas and the environs of New 

 Orleans. 



