38 FLORA OF PHILADELPHIA. 



- 32. Panicum commutatum Schultes. M. p. 88. Dry woods and thickets. 

 Summer. 

 Bucks— Rock Hill (Fr.). Delaware— Marple (B. Sm.). Lancaster— 

 (P.). Northampton— Easton, Porter (B. C). 



33. Panicum Ashei G. Pearson. M. p. 88. Dry woods. Summer. 



Lancaster — (P.). 



34. Panicum macrocarpon LeConte. M. p. 88. Usually on dry hillsides. 



Summer. , , 



Philadelphia— Byberry, Mart. (B. C), Germantown (St.). Bucks — 



Bock Hill (P.). Delaware — (P.). Chester — Locksley, West Chester 



(St.). Northampton— (P.). 

 Gloucester— Mickleton (He.). 



35. Panicum Porterianum Nash. M. p. 88. Woods. Summer. 



36. Panicum pubifolium Nash. M. p. 1041. Rocky woods. Summer. 



Bucks— Durham, Ruth (Pr.). Lancaster — (P.). Northampton — (P.). 



37. Panicum clandestinum L. M. ,p. 88. In thickets. Early summer. 



38. Panicum decoloratum Nash. M. p. 1051, 2d edition. Sandy soil. 



Spring. 

 Bucks— Tullytown (P.). 



12. CHAETOCHLOA Scribn. Pox-tail Grass. 



Bristles downwardly barbed. 1. C. verticillata. 



Bristles upwardly barbed. 



Spike-like inflorescence racemose; second scale much shorter than the 



spikelet. . 2. C. glauca. 



Spike-like inflorescence paniculate, sometimes nearly racemose in some 

 forms of No. 3; second scale as long as the spikelet or nearly so. 

 Flowering scales dull, faintly rugose, obtuse, rather thin in fruit. 

 Inflorescence 2.5-8.5 em. long, 1.25 cm. or less thick; spikelets 



about 2 mm. long; bristles green. 3. C. vi/ridis. 



Inflorescence 1-2 dm. long, 1.25-5 em. thick; spikelets about 3 

 mm. long; bristles usually purple. 4. C. Italiea. 



Flowering scales shining, perfectly smooth, very acute, hard in 

 fruit. 5. C. magna. 



1. Chaetochloa verticillata (L.) Scribn. M. p. 89. Near dwellings and 



waste places. Summer. 



Philadelphia— Byberry, Mart. (B. C), Manayunk (VP.), City streets 

 (W. Tr.). Bucks— (P.). Chester— (P.). Lancaster— (P.). Northamp- 

 ton— Easton, Porter (B. C). 



Camden — Camden (Li.). Gloucester — Mickleton (He.), Swedesboro 

 (Li.). Hunterdon— Rosemont (C). 



New Castle — Common. 



2. Chaetochloa glauca (L.). Scribn. Pigeon-grass. M. p. 89. In stub- 



ble. Summer. 



3. Chaetochloa viridis (L.) Beauv. M. p. 90. Cultivated grounds. Sum- 



mer. 



4. Chaetochloa Italica (L.) Scribn. Millet. M. p. 90. Escaped from 



cultivation. Summer. 



5. Chaetochloa magna (Griseb.) Scribn. M. p. 90. Swamps. Summer. 



Cape May— Cape May (St.). 



