306 ALSINACEAE 



6. A. longifolia (Muhl.) Britton. In low meadows and swamps: 



Newf. to Alask., Ky. and La.; in the Rocky Mt. region, Br. 

 Col. and northern Europe and Asia. 



Common throughout the range, except in the pine-barrens of 

 N. J. and east and south of them; rare on L. I. 



7. A. graminea (L.) Britton. In fields and along roadsides: 



Newf. to Ont. and Md. Adventive from Europe. 



Common throughout the range, except in southern N. J. and 

 the pine-barrens of L. I. 



8. A. borealis (Bigel.) Britton. In wet places: Lab. to R. I., 



northern N. J., Minn, and Br. Col., south in the Rocky Mts. 



to Colo. Also in northern Europe and Asia. 



Conn. Not common along the coast, increasing and more common 



northwestward into Litchfield Co. 

 N. Y. Pine Plains, Dutchess Co., and from Ulster, Greene, 



Delaware and Sullivan counties. 

 N. J. Kittatiny Mts., Sussex Co. 

 Pa. Wayne, Monroe and Montgomery counties, increasing 



northward. 



Tertiary, o: Cretaceous, o: Older Formations; increasing but 

 never very common northward. South of the moraine only in Pa. 

 117-187 days. Sea level-3,800 ft. 



2. Cerastium L. 



Petals equalling the sepals or shorter. 



Pedicels not longer than the sepals; flowers glomerate. 1. C. viscosum. 

 Pedicels subsequently longer than the sepals; flowers 

 cymose. 

 Leaves '4-8 mm. long; capsule nearly straight. 2. C. semidecandrum . 



Leaves 8-25 mm. long; capsules curved upward. 3. C. vulgatum. 

 Petals longer than the sepals, rarely wanting. 



Annuals, sticky pubescent; flowers 4-6 mm. broad. 4. C. longipedunculatum. 



Perennials; flowers 10-20 mm. broad. 



Leaves linear to linear-lanceolate; pod about half 



as long again as the calyx. 5. C. arvense. 



Leaves lanceolate to oblong- lanceolate; pod twice 

 as long as the calyx. 6. C. velutinum. 



i. C. viscosum L. In waste places and meadows: N. B. and 

 Ont. to Fla. and Mex. Naturalized from Europe. Natural- 

 ized also in the W. I., Cent. Am. and on the Pacific coast. 



Throughout the range but frequently rare locally; rare or wanting 

 in the pine-barrens of N. J. and L. I. Naturalized from Europe. 



