HOFFMANN: FLORA OF BERKSHIRE COUNTY. 335 
AMBROSIA. Ragw-eed. 
A. artemisiifolia L. Ragweed; Roman Wormwood. — {A. ela- 
iior 111. Fl. ed. 2.) 
Roadsides, waste places and cultivated ground; common. 
A. TRiFiDA L. — Occasionally adventive. Flood-plain of the Hoosac 
River, Williamstown ; chicken-yard, Stockbridge. 
ANAPHALIS. E\TERLASTIXG. 
A. margaritacea (L.) B. & H. Pearly Everlasting. — Dry open 
woods, upland pastures and clearings; common. 
ANTENNARIA. Everlasting; Ladies' Tobacco. 
A. Brainerdii Fernald. — Bank of Deerfield River, Florida. 
A. canadensis Greene. — Wooded banks; frequent. 
A form with purplish stem, with petaloid bracts, from Savoy. 
A. f allax Greene. — Rich open woods ; frequent in the valley. 
A. neglecta Greene. — Fields and open woods; common, especially 
on the plateau. Altitude 2300 ft., Florida. Plants collected from 
Great Barrington approach var. simplex Peck. 
A. neodioica Greene. — Open woods, often on thin soil over rocks; 
common. 
var. grandis Fernald. — Open woods; frequent. 
A. occidentalis Greene. — Rich open woods and grassy banks ; fre- 
quent. 
A. Parlinii Fernald. — Rich open woods and grassy banks; fre- 
quent in the valley. 
A. petaloidea Fernald. — Rocky woods; frequent in the valley. 
A. plantaginifolia (L.) Richards. — Dry woods; frequent in the 
southern part of the valley. Occasional as far north as Cheshire 
(Cushman). 
ANTHEMIS. Chamomile. 
A. CoTULA L. May-weed. — Roadsides and waste places; com- 
mon. 
ARCTIUM. Burdock. 
Key to Arctium, 
a. Heads corymbose, lons-potlunclod; k-af-hlades rouiid-ovato, obtuse; 
petioles strongly angular, decplj- furrowed. 
Petioles solid; heads very large and broad, '.i to 4..") oiu. in diainet'er; 
involucre glabrous, green .-l . Lappa. 
