AMMIACEAE 475 



Throughout the range, except in the pine-barrens, and east and 

 south of them, there wanting. 



5. H. ranunculoides L. f. In ponds and swamps: Pa. to Fla., near 

 the coast, west to Tex., Ore. to L. Cal. Also in Central and 

 South America, Abyssinia and Italy. 



Known only from Chester and Delaware counties, Pa., in our 

 range, regions near sea level with a growing season of 179 days. 



Hydrocotyle rotandifolia Roxb., a native of tropical Africa and Asia, is reported as 

 becoming naturalized in lawns near Philadelphia. 



2. Sanicula L. 



Perennial; styles longer than the bristles; some staminate flowers in 

 separate heads. 

 Petals and anthers greenish white; calyx segments cuspidate; 



fruit 6 mm. long. I. 5. marylandica. 



Petals and anthers yellow; calyx segments obtuse; fruit about 3 



mm. long. 2. S. gregaria. 



Biennial; styles shorter than the bristles; staminate flowers never in 

 separate heads. 

 Leaves 3-5 divided; pedicels of staminate flowers 2 mm. long; 



fruit less than 4 mm. long. 3. S. canadensis. 



Leaves 3-foliolate; pedicels of staminate flowers 4 mm. long; 



fruit 6 mm. long or more. 4. 5. Irifoliata 



i. S. marylandica L. In rich woods: Newf. to Alberta, Ga. and 

 Colo. 



Throughout the area, except in the pine-barrens, but becoming 

 rare southward. 



2. S. gregaria Bicknell. In woods and thickets: B. N. and Ont. 



to Minn., Ga., Kan. and Neb. 



Conn. Rare and scattered over most of the state, increasing 

 northwestward. 



N. Y. Frequent on L. I., north of the moraine; on S. I.; abund- 

 ant in the Bronx, thence increasing northward. 



N. J. Not known from the pine-barrens, reported from Swedes- 

 boro, Gloucester Co., thence increasing but scattered northward. 



Pa. Chester, Delaware, Monroe, Bucks and Northampton 

 counties. 

 Tertiary, o: Cretaceous, very rare in Gloucester Co., N. J.: Older 



Formations, increasing but not common northward, n 7-1 89 days. 



Sea level-3,365 ft. 



3. S. canadensis L. In woodlands: Ale. to Fla., S. Dak., and 



Tex. 



