1913] Reports on the Flora of the Boston District,— XVII 129 
Thoreau, June 19, 1859); “Heywood meadow near R. R. spring in 
brush, ^ Concord (H. D. Thoreau, June 29, 1859); Needham (T. O. 
Fuller, June 9-10, 1887); Purgatory Swamp, Norwood (C. E. Faxon, 
June 17, 1879; C. W. Swan, June 17, 1882; E. F. Williams, June 22, 
1896 and June 4, 1899). 
TRISETUM. 
T. spicatum (L.) Richter. Andover (J. Blake, June 26, 1832); 
rocky bank of Merrimac and sandy wood-road near Pomp's Pond, 
Andover (A. S. Pease, Sept. 19, 1903; June 4 and 20, 1904); Bateman's 
Pond, Concord (C. W. Swan & C. W. Jenks, July 6, 1888). 
DESCHAMPSIA. 
D. caespitosa (L.) Beauv. Shore of Haggett's Pond, Andover 
(C. H. Knowlton, June 20, 1903); shore of Merrimac River, Dracut 
and Lowell (C. W. Swan, July 20, 1882); introduced on land of J. R. 
Churchill, Dorchester (J. R. Churchill, 1884 to date); Chelmsford 
(C. W. Swan) according to Dame € Collins, Fl. Middlesex Co., 128, 
1888. 
D. flexuosa (L.) Trin. Dry ground; not reported from western 
and southwestern towns, but frequent elsewhere. 
AVENA. 
A. HIRSUTA Roth. South Boston dump (C. W. Swan, June 6, 1886). 
“Habitat passim in Europae cultis," according to Roth, Catalecta 
Botanica iii. 19, 1806. Specimen in herb. Yale University. 
A. HYBRIDA Koch. Brickyard, Newburyport (E. F. Williams, 
July 31, 1898). An Old World species. Specimen in herb. N. E. 
Botanical Club. 
A. sativa L. Fields, roadsides and waste places, frequent through- 
out. 
ARRHENATHERUM. 
A. ELATIUs (L.) Beauv. Fields and roadsides, occasional. 
