HOFFMANN: FLORA OF BERKSHIRE COUNTY. 251 



S. FRAGiLis L. Crack Willow. — Borders of streams; occasional. 

 Adams (Knowlton and Bean); Great Barrington (Cushman); Egre- 

 mont. 



S. humilis Marsh. — Dry open woods and sandy soil; common. 

 Altitude 1900 feet, Florida. 



S. lucida Muhl. Shining \Yillow. — Borders of swamps, shores 

 of lakes and streams, wet roadsides; common. 



var. angustifolia Anders. — Marsh on Hancock Mt, (altitude 

 2000 feet) . The only known station for the State. 



var. intonsa Fernald. — Williamstown. 



S. nigra Marsh. Black Willow. — Borders of ponds and along 

 streams; common in the valley. 



var. falcata (Pursh) Torr. — Occasional with the type. 



S. pedicellaris Pursh, var. hypoglauca Fernald. — (S. pedicel- 

 laris Man. ed. 7 in part; vid. Rhodora, 11: 161, 1909.) 



Open bogs; frequent. 



Leaves green above, glaucous beneath. S. pedicellaris has leaves 

 green on both surfaces. 



S. PENTANDRA L. — Occasionally escaped from cultivation. Stock- 

 bridge; Great Barrington. 



S. petiolaris Sm. — Low ground; frequent. 



S. PURPUREA L. Purple Willow. — Occasionally naturalized 

 along brooks; Williamstown; Richmond; Stockbridge; Sheffield. 



S. rostrata Richards. Beaked Willow. — Borders of swamps or 

 dry thickets; common. On the plateau forming with S. cordnta and 

 S. discolor thickets along the roadsides. A form from Great Barring- 

 ton with capsules partially or completely doubled. 



S. sericea Marsh. Silky Willow. — Borders of swamps, along 

 streams and in low ground; common. 



S. serissima (Bailey) Fernald. — Swamps, in calcareous soil; fre- 

 quent in the southern part of the valley, from Richmond an<l Stock- 

 bridge to Sheffield. 



S. subsericea (Anders.) Schneider. — Hinsdale. 



Similar to .S. petiolaris. Leaves loosely .sericeous when young, at 

 length glabrate except the puheridvnt midrib aboir, rather coarsely 

 appressed-serrate ; winter l)U(ls puberulent; scales oblong, with 

 rounded blackish tijjs; capsule lance-conic, blunt, loosely silky, a to 

 7 mm. long, its pedicel many times exceeding the gland. !'/</. Rho- 

 dora, 11: 12 (1909). 



