274 DAVENPORT ACADEMY OF SCIENCES. 



979. M. sylvatica, Torr. & Gray. 

 Frequent in low or rocky woods. 



980. M. Willdenovii, Trin. 

 Dry woods ; frequent. 



981. M. diffusa, Schreber. Drop Seed. Nimble Will. 

 Dry woods and waste places ; common. 



Brachyelytrum, Beauv. 



982. B. aristatum, Beauv. 

 Rocky woods, Wild Cat Den. 



Phleum, L. 



983. P. pratense, L. Timothy. 

 Common. 



Alopecurus, L. Foxtail. 



984. A. geniculatus, L. 



Low moist places ; infrequent. 

 Sporobolus, R. Br. Drop-seed Grass. 



985. S. asper, Kunth. 



Dry sandy soil ; frequent. 



986. »S. neglectus, Nash. 



(S. vaginceflorus, Vasey. — Manual.) 



For nomenclature of this and the next species see Bull. Torr. 



Club, XXII: 464. 1895. 

 Dry soil ; frequent. Very abundant locally. 



987. S. vaginceflorus, Wood. 



(S. minor, Vasey. — Manual.) 



Dry soil ; hardly less frequent than the preceding species. 



988. S. helerolepis, Gray. 

 Dry prairies ; frequent. 



989. S. cryptandrus, Gray. 



Dry sand ; Muscatine Island, banks of Cedar River. 

 Agrostis, L. 



990. A. alba, L. Fiorin. White Bent-Grass. 

 Meadows ; infrequent. 



991. A. alba, L., var. vulgaris, Thurb. Red Top. 

 Meadows; common. 



992. A. perennans, Tuckerm. Thin-Grass. 

 Rich woods ; infrequent. 



