1913] Reports on the Flora of the Boston District,—— XVII 123 
CENCHRUS. 
C. CAROLINIANUS Walt. In sandy soil and waste places, apparently 
introduced; at ten scattered stations. 
ZIZANIA. 
Z. aquatica L. Wet borders of Concord and Charles Rivers and 
their tributaries, in Lowell, Wayland, Framingham, Newton, Wellesley, 
Needham, Medfield. An uncommon species in our region. 
Z. palustris L. Rivers and ditches; frequent throughout. 
LEERSIA. 
L. oryzoides (L.) Sw. Wet places, common throughout. 
L. oryzoides (L.) Sw., forma glabra A. A. Eaton. “Tidal shores of 
the Merrimac river near ‘the laurels’ in the western part of Newbury- 
port ” ( A. A. Eaton, Sept., 1902; A. A. Eaton de M. L. Fernald, Oct. 2, 
1902, specimens in herb. N. E. Botanical Club). See RHoponma v. 
118, 1903. 
L. virginica Willd. Moist woods, occasional from Walpole north- 
ward. 
PHALARIS. 
P. arundinacea L. Swamps, marshes and pond margins, locally 
abundant. No reports from southeastern portion of district. 
P. arundinacea L., var. picra L. Persistent and occasionally 
spreading from old gardens; apparently native in Stoughton (S. F. 
Blake, June 15, 1912). 
P. CANARIENSIS L. Waste places and dumps around cities and 
towns, occasional. 
ANTHOXANTHUM. 
A. ODORATUM L. Fields, pastures and roadsides; very common 
throughout. 
A. Puget Lecoq € Lamotte. South Boston (C. E. Perkins, June 
25, 1879); Jamaica Plain [W. Roxbury] (E. & C. E. Faxon, July 8, 
1883); Milton (G. G. Kennedy, June 27, 1897). 
