42 FLOEA OF PHILADELPHIA. 



Gloucester— WoodhuTj (C). Atlantic— Tisimmonton (C). 

 New Castle— Col. Andrews, frequent. 



23. BEACHYELYTRUM Beauv. 



1. Brachyelytrum erectum (Schreb.) Beauv. , M. p. 101. Moist places. 

 Summer. 



24. HELEOCHLOA Host. 

 1. HELEOCHLOA SCHOENOIDES (L.) Host. Eush Cat-tail Grass. M. p. 102. 

 Waste places. Summer. 

 Philadelphia— 2 miles west of Chestnut Hill (VP.). Buds— Bensalem, 

 Mart. (Fr.). PeZaware— Haverford, near Friends' Meeting-house, Dr. 

 Geo. Smith (Fu.). Lancaster— Gohimhia and Lancaster (P.). 

 Camderi— Ballast (He.) (Te.). Mercer— Trenton (C). 

 New Castle— Bt. Georges (Pr.), Bush's Wharf, Tatnall; Odessa, New 

 Castle, Newark, Commons; Christiana Ave. 



25. PHLEUM L. 



1. Phleum pratense L. Timothy. M. p. 102. Fields and meadows. 

 Summer. 



26. ALOPECUEUS L. Fox-tail. 



Outer scales of the spikelet united for one-half their length, smooth to hispid 



on the keel. 1. A. agrestis. 



Outer scales of the spikelet united for one-quarter their length or less, long- 

 ciliate on the keel. 

 Scales 2.-2.5 mm. in length. 2. A. geniculatxis. 



Scales 4-6 mm. in length. 3. A. pratensis. 



1. Alopecurus agrestis L. M. p. 103. Ballast. Summer. 



Philadelphia— Ballast (P.). 

 Camden — Ballast. 



2. Alopecurus geniculatus L. M. p. 103. Moist meadows. Summer. 



Philadelphia— Below Old Navy Yard, 92d Street Station (St.). Dela- 

 ware— Tinicum, Dr. Geo. Smith (Fu.). 



Camden— Petty 's Island, Camden (C). Gloucester — Swedesboro (Li.). 

 New Castle — Cherry Island near Edgenioor, Commons; Bush's, Tatnall. 



3. Alopecurus pratensis L. M. p. 103. Meadows. Summer. 



Philadelphia— B\iiladiel\)\iia, Mart. (B. C). 

 Neio Cas^Ze— Wawaset Nurseries. 



27. SPOEOBOLUS E. Br. Drop-seed, Eush-grass. 



Panicle contracted, spike-like. 



Spikelets more than 3.5 mm. in length. 



Panicle terminal; upper sheaths 7.5 cm. long or more. 



Flowering scale appressed-pubescent below, with long hairs. 



1. S. asper. 

 Flowering scale glabrous. 2. S. longifolius. 



Panicles terminal and lateral; sheaths 3.75 cm. long or less. 



3. S. vaginaeflorus. 

 Spikelets 3 mm. long or less. 4. S. Indicus. 



Panicle open, its branches more or less spreading, at least at maturity. 

 First scale one-half as long as the second or less. 5. S. heterolepis. 



