246 REPORT OF NEW JERSEY STATE MUSEUM. 



Edge of salt marshes along the coast and on the lower bay 

 sliore. 



Fl. — Late July to early September. 



il/anV/»!^.— Sandy Hook (NB), Pt. Pleasant, Manahawkin, Surf City 

 (L), Barnegat City Jnc. (L), Beach Haven (L), Harvey Cedars (L), Pea- 

 hala (L). Ship Bottom (L), Atlantic City (NB), Cape May Ct. House, Dias 

 Creek. 



Elymus canadensis L. Nodding Wild Rye. 



Elymus canadensis Linnjeus, Sp. PI. 83. 1753 [Canada]. — Knieskern 39. — 

 Willis 75.— Britton 298. 



River banks, Northern and Middle districts. 



Fl. — Early July to early September, or occasionally later. 



Middle District. — Shark River (C), Delair, Swedesboro. 



HYSTRIX Moench. 



Hystrix hystrix (L.). Bottle-brush Grass. 



Elymus Hystrix Linnjeus, Sp. PI. Ed. 2. 124. 1762 [original habitat un- 

 known]. — Britton 299. — Keller and Brown 57. 



Rocky woods of the northern counties; reported by Dr. Britton 



from one station in the Middle district. 



Middle District.— Avneytown (C). 



Family CYPERACE.E. Sedges. 



Distinguished from Grasses by their usually solid, more or 

 less triangular stems and closed sheaths to the leaves. Fruit an 

 achene. 



Flowering and Fruiting Data. — ^In all the genera of this 

 family, except Cy perns and Car ex (q. v.) and certain special 

 cases noted under individual species, the time of year indicates 

 the season during which well developed (and generally mature) 

 achenes are commonly to be found and intact spikelets occur. 



Key to Genera. 



a. Flowers all of one kind, perfect. 

 b. Spikelets two-ranked. 



c. Flattened or linear, arranged in terminal umbles, in loose spikes or 



spherical clusters. Cyperus, p. 248 



cc. Flattened, arranged in two ranks on peduncles from the axils of 



the short leaves, inflorescens extending for same distance along 



the culm. DuUchium, p. 256 



I 



