144 REPORT OF NEW JERSEY STATE MUSEUM. 



Swampy ground in the North and Middle districts and down 

 the coastal strip to Cape May, occurring among the roots of 

 grasses and sedges or with sphagnum ; especially abundant along 

 the inner edge of the salt marshes. 



Spores Mature. — Late June to early September, Semi-ever- 

 green. 



Middle District.— VzrmiY\g<ld\t, Delanco, Mickleton (C), Center Sq. (H), 

 Lindenwold, Sewell (S), Glassboro (S), Swedesboro. 



Coast Strip. — Pt. Pleasant, Forked River, Cox's, Absecon (Bassett). 

 Cape May.— Court House (S),Cold Spring (S). 



{ 



Family ISOETACE^. Quillworts. 



ISOETES L. 



The four species of Isoetes recorded from the Delaware River 

 are given on the basis of specimens in the collection of Mr. W. A. 

 Poyser, which were identified for him by Mr. A. A. Eaton ; other 

 specimens presumably identical are in the Academy collection. 

 Mr. Poyser tells me further that /. saccJiarata, riparia and echin. 

 braunii seemed to prefer the sand, but canadensis was in the coarse 

 gravel. All were exposed at low tide. At Fish House /. 

 saccharata intergraded with /. riparia, but at Delair was ap- 

 parently growing alone. He sent Mr. Eaton abundant material 

 from each locality, alive. 



Outside of the Delaware River Isoetes seems rare in our dis- 

 trict. Specimens from Camden Co. and Toms River are cited 

 as identified in Britton's Catalogue. Besides these I have only 

 seen specimens from Mays Landing; these are in the Academy 

 herbarium and are supposed to be /. riparia. Specimens of /. 

 engehnanni identified by Eaton from Assinpink Creek, just north 

 of our limits, are in Mr. Poyser's collection. 



Isoetes engelmanni A. Br. Engelmann's Quillwort. 



Isoetes Engelmanni, A. Braun, Flora 29: 178. 1846 [St. Louis, Mo.]. — Britton 

 302. — Keller and Brown 17. 



Ponds and lakes of the northern counties and sparingly in 

 Camden Co. 



Middle District. — Camden (C) 



