Cinna Agrostideae 129 



5. Agrostis hyemalis (Walt.) BSP. (Agrostis antecedens Bickn. and 

 Agrostis hyemalis of recent authors, in part.) Ticklegrass. Map 210. 

 This species is infrequent to common in all parts of the state. It prefers 

 a slightly acid soil, hence it is infrequent to absent in the neutral soils of 

 the central counties. In the southern counties it occurs, in hard, white 

 clay soil and is usually common in fallow fields, on washed slopes, along 

 clayey roadsides, and in moist, sandy and mucky places in our northern 

 counties. 



Mass. to Iowa and Kans., southw. to Fla. and Tex. 



6. Agrostis perennans (Walt.) Tuckerm. Autumn Bent. Map 211. 

 Infrequent to frequent in all parts of the state except in the prairie areas. 

 This is a woodland species which seems to prefer a slightly acid soil and 

 is found in black and white oak woods, pin oak woods, aspen thickets, 

 at the bases of sandstone ledges, and rarely in prairie habitats or 

 fallow fields. This species shows great variation which I assume to be the 

 result of varying amounts of light, soil acidity, and nutriment. 



Que. to Minn., southw. to Fla. and e. Tex. 



67-241. CfNNA L. 



Spikelets 5 mm long; panicle rather dense, the branches ascending. . . 1. C. arundinacea. 

 Spikelets 3.5-4 mm long; panicle loose, the branches spreading or drooping. (See ex- 

 cluded species no. 68, p. 1028.) C. latifolia. 



1. Cinna arundinacea L. Woodreed. Map 212. Frequent to rather com- 

 mon in all parts of the state. It grows in wet soils in almost all kinds of 

 habitats except in pure sand. This is a woodland species but is sometimes 

 found in wet clearings if shaded by rank vegetation. 



Maine to S. Dak., southw. to Ga. and e. Tex. 



69-225. ALOPECURUS L. Foxtail 



Spikelets about 5 mm long. . . . : 1. A. pratensis. 



Spikelets less than 3 mm long. 



Lemmas awned on the back about midway between the base and apex, the awn 



usually included, sometimes exserted but not for more than 1 mm 



2. A. aequalis. 



Lemmas awned on the back at about a fourth the length of the lemma above the 

 base, the awn exserted about 2-3 mm 3. A. carolinianus. 



1. Alopecurus pratensis L. Meadow Foxtail. Map 213. Specimens 

 of this species have been collected in Tippecanoe County, and I have it 

 from Wells County, where it was well established when collected in 1932. 



Nat. of Eurasia; introduced from Newf. and Lab. to Alaska, southw. 

 to Del., Iowa, Idaho, and Oreg. 



2. Alopecurus aequalis Sobol. (Alopecurus geniculatus var. aristulatus 

 Torr. of Gray, Man., ed. 7 and Alopecurus geniculatus Michx. of Britton 

 and Brown, Illus. Flora, ed. 2.) Short-awn Foxtail. Map 214. This grass 

 is infrequent in the lake area and local south of it. It grows in shallow 



