FLORA OF MICHIGAN. 157 



*1518. var. brevior, Dewey. Th. 



Common. 



*1519. var, alata, Bailey. 



Keweenaw Co. ,F.; Crystal Lake, Montcalm Co., Wheeler; So. Haven;- Niles, Dr. G. L. Ames, in 

 University Herb. 



1520. . syelmocephala, Carey.) 



Crystal, Montcalm Co. Only station known in the State.l IColl. by C. F. Wheeler, Sept. 11, 1875. 



CYIII. GBAMINE^J. GRASS FAMILY. 

 477. SPARTIXA, Schreb. CORD OR MARSH GRASS. 



* 1521. S. cynosuroides, Willd. Fresh-water Cord-Grass. Th. 



Banks of rivers, to N. shore L. Superior, Agassiz. Frequent. 



478. PANICUM, L. PANIC-G'RASS. 



*1522. P. GLABRUM, Gaudtn. 

 Waste places. Common.! 



*1523. P. SANGUINAL.E, L. Common Crab- or Finger-Grass. 



Waste places, gardens, and fields. A bad weed, difficult to dig up or pull out; grows quickly and is 

 perhaps the worst weed we have in gardens, at least in some localities. P. glabrum grows in the same 

 situations but is smaller and easily eradicated. 



* 1524. P. capillare, L. Old-witch Grass. Th. 



Sandy soil, fields. The spreading panicle is easily broken off and blown about by the wind. 

 Common. 



1525. P. agrostoides, Muhl. 



Specimen in the College Herb., collected by Dr. D. Cooley, at Washington, Macomb Co. Only local- 

 ity known in the State. 



*1526. P. virgatum, L. Th. 



S. Mich., Wright Cat. ; Ionia; Flint. A tall coarse grass along rivers. Infrequent. 



1527. P. xantliopliysum, Gray. N. & U. P. 



Grand Traverse Co., Indian River and Black Lake, Cheboygan Co., C. F. Wheeler; northward to 

 Keweenaw Co., F. 



*1528. P. latifolium, L. L. P. 



Rich woods. Northward to Oscoda Co. Common. 



*1529. P. clandestinum, L. 



Low grounds. Macomb Co.; Flint ; Hubbardston. Rare. 



*1530. P. scoparium, Lam. Th. 



Hubbardston. Along the R. R. between St. Johns and Mair, northward to Baldwin. Frequent in 

 light sandy soil. 



1531. P. nitidum, Michx. (Lam. ?). 

 Washington, Macomb Co., Dr. Cooley; Keweenaw Co., F. 



1532. P. microcarpoii, Muhl. 

 Washington, Macomb Co., Dr. Cooley. 



*1533. P. depauperatum, Muhl. Th. 



Dry woods and barrens. Common. 



*1534. P. dichotomum, L. Th. 



Dry or low grounds. A very common and exceedingly variable grass. Some forms saem distinct 

 enough to be considered species- The most common forms are: 



* 1535. var. commune, Wats. 

 *J536. var. fasciculatum, Wats. 

 *1537. var. g-racile, Wats. 



