222 REPORT OF NEW JERSEY STATE MUSEUM. 



Frequent in rocky woods in the northern counties and occa- 

 sionally in the Middle district. 

 Fl. — Early July to late July. 



Middle District.— Shnrk River (C), Pt. Pleasant (S), Haddonficld (P), 

 Mickleton (NB), Swedcsboro. 



ALOPECURUS. 



Alopecurus geniculatus aristulatus (Michx.). Marsh Fox-tail. 



PI. VIII., Fig. 7. 



Alopecurus aristulatus Michaux, Fl. Bor. Am. I.: 43. 1803 [Canada]. 

 Alopecurus subaristatns Barton, Fl. Phila. I. 47. 1818. — Nuttall, Gen. II. 

 52. 1818. 



Locally in swampy ground in the Northern and Middle dis- 

 tricts. 



Fl. — Late May to early July. 

 Middle District.— Red Bank, Swedesboro (CDL). 



SPOROBOLUS R. Brown. 



Key to the Species. 



a. Panicles contracted and spike-like, leaves with an attenuated involute tip. 

 b. Panicle terminal, upper sheaths 75 mm. long or more. 



c. Two middle scales of the spikelet very unequal, attenuate. 



S. clandestinus, p. 223 

 cc. Two middle scales of the spikelet nearly equal, blunt. 



S. asper, p. 223 

 bb. Panicles terminal and lateral, upper sheaths not over 35 mm. long. 



S. vaginccAorus, p. 222 

 aa. Panicles diffuse, grayish, branches capillary, spikelets very minute. 

 b. Base of plant flattened, leaves folded longitudinally. 



S. torreyanus, p. 223 

 bb. Base of plant not flattened, leaves flat. S. serotinus, p. 223 



Sporobolus vaginaeflorus (Terr.). Sheathed Rush Grass. 



PI. XIV., Fig. 3. 

 Vilfa vaginccflora Torrey, A. Gray, Gram. & Gyp. No. 3. 1834 [Pennsylvania]. 

 Sporobolus vagincsHorus Britton 288. 



Dry ground, northern counties, and rarely south to the Middle 

 District. 



Fl. — ^Early September to early October. 



Middle District.— Red Bank Mon. Co. (NB), Pt. Pleasant (McK), Bir- 

 mingham, Mickleton (NB), Swedesboro. 

 Pine Barrens. — Landisville (T), incursion from Middle District. 

 Cape May. — Bennett. 



