1914] Flora of the Boston District,— XIX. 107 
S. cordata Muhl., var. myricoides (Muhl.) Carey. Wet ground, 
Blue Hills, W. Quincy (J. R. Churchill, Apr. 25 and June 21, 1891); 
Milton (J. R. Churchill, April, May and June, 1891). 
S. discolor Muhl. Swamps and roadside thickets, generally 
distributed throughout. 
S. discolor Muhl., var. eriocephala (Michx.) Anders. Waltham 
(Gray Herb., no date); Roxbury (J. A. Lowell, 1849); Framing- 
ham (E. C. Smith, May 9, 1899). 
S. discolor Muhl., var. prinoides (Pursh) Anders. Cordaville 
Road, Framingham (E. C. Smith, May 15, 1899); swamp, Blue Hills, 
W. Quincy (J. R. Churchill, Apr. 25, May 10 and June 21, 1891). 
S. rRAGILIS L. Recorded as introduced at several stations, but 
apparently not evenly distributed. 
S. humilis Marsh. Sand-plains and dry soil; common, especially 
southward. 
S. lucida Muhl. Swamps and wet places; frequent, especially 
northward. 
S. nigra Marsh. Shores of streams and ponds, frequent. 
S. nigra Marsh., var. falcata (Pursh) Torr. Occasional. 
S. NIGRICANS Sm. Waste ground off Ipswich St., Back Bay, Boston 
(F. F. Forbes, 1907). Native of Europe and northern Asia. 
S. pedicellaris Pursh, var. hypoglauca Fernald. Peatbogs and 
swamps in central and northern portions; frequent. First published 
in Ruopona xi. 161, 1909. 
Salix pedicellaris Pursh, var. tenuescens lernald. Moeadows 
of Concord River, Bedford (M. L. Fernald, May 23, 1909). Type 
station. Published in Ruopona xi. 162, 1909. 
S. PENTANDRA L. Pond shores and roadsides; Wayland, Weston, 
Wellesley, Brookline. 
S. petiolaris Sm. Swamps and wet places, frequent. 
S. PURPUREA L. Wet places, occasional. 
S. rostrata Richards. Swamps and thickets, common. 
S. sericea Marsh. Swamps, frequent. 
S. subsericea (Anders.) Schneider. (See Ruopora xi. 9-12, 1909.) 
Low grounds; Arlington, Cambridge, Brookline, Dedham, Wayland, 
Sudbury. 
S. tristis Ait. Sand-plains and dry places, common throughout. 
S. VIMINALIS L. Introduced and established at Medford, Cam- 
bridge, Roxbury, Brookline, Dorchester. See Robinson, Fl. Essex Co., 
99, 1880. 
