294 POLYGONACEAE 



2. T. arifolium (L.) Raf. In moist or wet soil: N. B. and Ont. to 

 Minn., south to Ga. 



Throughout the range, except the pine-barrens. 



7. Tiniaria Webb & Moq. 



Outer segments of the calyx unchanged or keeled in fruit. 

 Achenes granular and dull, ocreae not bristly. 

 Athene smooth and shining; ocreae bristly. 

 < i.'.'.r segments of the calyx conspicuously winged in fruit. 

 Calyx wings not incised. 



Fruiting calyx 2.5-3 mm. long, the wings crisped. 

 Fruiting calyx 1.5-2 mn;. long, the wings rather flat. 

 Calyx wings incised. 



i. T. Convolvulus (L.) Webb & Mag. In waste and cultivated 

 grounds: nearly throughout N. Am. Naturalized from 

 Europe. Native of Asia. 

 Locally abundant as a weed. 



2. T. cilinodis (Michx.) Small. In rocky places: N. S. to Ont., 



Minn, and Pa., south in the Alleghanies to N. Car. 



Conn. Rare along the coast, increasing but not very common 



northwestward. 

 N. Y. Forest Park, L. I.; not reported from S. I.; Westchester 



Co. and northern N. Y. City rare, thence increasing and common 



northward. 

 N. J. Warren, Hunterdon and Sussex counties. 

 Pa. Monroe, Northampton, Lackawanna and Luzerne counties. 



Tertiary, o: Cretaceous, 0: Older Formations, increasing and 

 common northward. 1 17-189 days. Sea level-3,100 ft. 



3. T. scandens (L.) Small. In woods and thickets: N. S. to 



Ont. and the Rocky Mts., south to Fla., Neb. and Tex. 



Locally abundant sometimes as a troublesome weed; rare or 

 wanting in the pine-barrens. 



4. T. dumetorum (L.) Opiz. Thickets and woods: northeastern 



U. S. Also in Europe. 



Conn. Scattered over the state. 



N. Y. Coastal L. I., S. I. and in the Bronx. 



5. T. cristata (Engelm. and Gray) Small. Sandy woods and 



rocky banks: Conn, to Ga., Ind. Terr, and Tex. 

 Conn. Milford and Huntington. 



N. Y. On L. I. and near the northern edge of N. Y. City and in 

 Westchester Co. Otherwise unknown. 



