52 FLOS A OF PHILADELPHIA. 



Bucks — Pipersville, Moyer (Fr.). Delaware — Swarthmore, Dr. J. B. 

 Brinton (B. C.)., Wawa (He.) (Ke.) (Li.), Haverford (Le.), Valley of 

 Darby Creek (B. Sm.), Eidley Creek, near West Chester pike (VP.). 

 Netv Cas^Ze— Brandywine, scarce. 

 8. POA COMPRESSA L. Wire-grass, English Blue-grass. M, p. 141. Waste 

 places, cultivated ground and woods. Summer. 



59. PANICULAEIA Fabr. Manna-grass. 



Spikelets ovate or oblong, 8 mm. long cr less. 



Flowering scales very broad, obscurely, or at least not sharply nerved. 

 Panicle open, the branches ascending or spreading, often drooping. 

 Spikelets 3-5-flowered, lowest flowering scale about 2 mm. long. 



1. P. laxa. 

 Spikelets 5-12-flowered; lowest flowering scale about 3 mm. 

 long. 2. P. Canadensis. 



Panicle contracted, the branches erect. 3. P. obtusa. 



Flowering scales narrow, sharply and distinctly 7-nerved. 



Panicle elongated, its branches erect or appressed. 4. P. elongata. 

 Panicle not elongated, open, its branches spreading or drooping, 

 rarely erect. 

 Scales about 2 mm. long, obtuse or rounded at the apex. 



Spikelets 3 mm, long or less ; branches of the panicle often 



drooping. 5. P. nervata. 



Spikelets 4-6 mm. long; branches of the panicle ascending 

 or spreading. 6. P. Americana. 



Scales 2.5-3 mm. long, truncate and denticulate at the apex. 



7. P. pallida. 

 Spikelets linear, 12 mm. long or more. 



Flowering scales 4-5 mm. long, obtuse, equalling or exceeding the obtuse 



palet. 8. P. fluitans. 



Flowering scale 6-8 mm. long, shorter than the acuminate palet. 



9. P. acutiflora. 



1. Paniculakia laxa Scribn. M. p. 143. In water or wet soil. Summer. 



Gloucester— MickletoTo. (He.). 



2. Paxicularia Canadensis (Michx.) Kuntze. Sattlesnal-e-grass. M. p. 



143. Bogs and wet places. Summer. 



3. Panicularia obtusa (Muhl.) Kuntze. M. p. ]43. Bogs near the coast. 



Summer. 



Burlington — Moorestown (Sts.), Atsion (Te.). Camden — Kaighn's 

 Swamp, Mart. (B. C), Ancora (Te.), Lindenwold, Clementon, Haddon- 

 fleld (VP.). Gloucester— Is! ear Mickleton (He.), Paulsboro (Ja.), Tom- 

 lin (Ke.), Swedesboro (Li.). Atlantic — Hammonton (Fr.) (Ke.), Egg 

 Harbor (Ke.). Ocean — Toms Kiver (Te.). 



New CastleSt. George's and Duck Creek, Commons; Thompsons, Tat- 

 nall; Canal near Delaware City, Tatnall and Commons. 



4. Panicularia elongata (Torr.) Kuntze. M. p. 143. Wet woods. Sum- 



mer. 

 Bucks— B.o(tk Hill (Fr.). DeZaware— Tinicum, Auhrey H. Smith (B. 

 Sm.). Lancaster— {P.). Northampton— Wind Gap, Pen Argyl (He.). 

 21/o?jmoM*7i— Holmdel (C). Hunterdon — Stockton (C). 



5. Panicularia nervata (Willd.) Kuntze. M. p. 144. Moist meadows. 



Summer. 



