78 Karl M. Wiegand and Arthur J. Eames 



1. A. pratensis L. Meadow Foxtail. 



Fields and roadsides, in rich soils ; rare. May 20-June 20. 



"A few places on the campus" (D.\) ; near the Home Economics Building (C. C. 

 Thomas) ; island in Fall Creek at Forest Home (A. R. Bechtcl) ; salt flats, Mon- 

 tezuma (K. M. W., A. J. E., & L.F. Randolph). 



Introduced from Eu. and naturalized in the Eastern States. 



2. A. aequalis Sobol. (See House, Bui. N. Y. State Mus. 254:94. 1924. A. genicu- 



lates, var. aristulatus, of Gray's Man., ed. 7, and of Cayuga Fl.) Floating 

 Foxtail. 



Mucky ditches and marshes, the nature of the soil not clear; frequent. June. 



Pool, foot of North Pinnacle, Caroline ; n. of Slaterville Springs ; Summit Marsh 

 and vicinity; Michigan Hollow Swamp (D. !) ; South Hill Marsh (D.) ; Ringwood; 

 Fall Creek, e. of Varna; Freeville Bog; West Dryden; Cortland marl ponds (D.\) ; 

 Inlet Marshes (D.) ; Canoga Marshes (D.) ; Junius; Howland Island; near Duck 

 Lake. 



Gulf of St. Lawrence to Alaska, southw. to Md. and Calif. ; rare on the Atlantic 

 Coastal Plain. Found also in Eurasia. 



27. Phleum L. 

 1. P. pratense L. Timothy. Herd's Grass. 

 Fields, roadsides, and other grassy places, in rich soil ; very common. June. 

 Escaped from cultivation, and naturalized. Native of Eu. 



At the second-growth flowering the spikelets are often viviparous (Dudley in 

 Cayuga Fl. !). 



28. Muhlenbergia Schreb. 

 a. Empty glumes minute, the first one obsolete or nearly so, the second one truncate ; 

 flowering glume long-awned ; scaly rootstocks not apparent. 1. M. Schreberi 



a. Empty glumes half the length of the flowering glume or more; rootstocks obviously 

 scaly. 

 b. Empty glumes broadly ovate, acute, one-half to two-thirds the length of the 

 flowering glume. 

 c. Flowering glume awnless; spikelets 1.5-2 mm. long. 2. M. sobolifera 



c. Flowering glume awned ; spikelets 3-4 mm. long. 3. M. tenuiflora 



b. Empty glumes lanceolate, three-fourths the length of the flowering glume or 

 longer. 

 c. Empty glumes unawned, but sometimes with a long acuminate tip projecting 

 considerably beyond the flowering glume ; panicle branched. 

 d. Internodes puberulent ; sheaths close, usually embracing the internode ; 

 panicle more or less exserted, the branches not divaricate in anthesis. 

 e. Empty glumes lanceolate, three-fourths to seven-eighths the length of 



the long-awned flowering glume, somewhat silvery. 4. M. sylvatica 



e. Empty glumes linear-lanceolate, slightly shorter or longer than the awn- 

 less or rarely awned flowering glume, less silvery. 5. M. foliosa 

 d. Internodes glabrous ; sheaths loose and somewhat inflated, partly free from 

 the internode ; panicle generally partly included or very slightly exserted, 

 the branches divaricate in anthesis. 6. M. mexicana 

 c. Empty glumes with a slender awn as long as or longer than the body ; panicle 

 very dense and spike-like, but interrupted, long-peduncled, usually livid. 



7. M. racemosa 



1. M. Schreberi J. F. Gmel. (M. diffusa of Cayuga Fl.) Dropseed. Nimble 

 Will. 

 Roadsides, old orchards, borders of copses, and elsewhere, in rich gravelly soils; 

 frequent. Aug.-Oct. 



