HYDROPHYLLACEAE 519 



HYDROPHYLLACEAE 



Corolla lobes convolate in the bud; placentae dilated. 



Stamens exserted, calyx not much enlarged in fruit. I. Hydrophyllum. 



Stamens not exserted; calyx much enlarged in fruit. 2. Nyctelea. 



Corolla lobes imbricated in the bud; placentae narrow. 3. Phacelia. 



I. Hydrophyllum [Tourn.] L. 



Leaves, at least the lower, pinnatifid or pinnately divided. 1. H. virginianum. 



Leaves palmately 5-9 lobed. 2. 77. canadense. 



i. H. virginianum L. Inwoods: Que. to Alaska, south to S. Car., 

 Kan. and Wash. 

 Conn. Rare, in Fairfield, New Haven, Hartford and Litchfield 



counties, increasing northwestward. 

 N. Y. Very doubtfully on L. I., except as a rare adventive; rare 



on S. I., thence increasing but not common northward. 

 N. J. Rare in Monmouth and Ocean counties, thence increasing 



but scattered northward; not in the pine-barrens, or south of 



them. 

 Pa. Pike, Monroe, Northampton, Bucks, Delaware and Chester 



counties. 



Tertiary, 0: Cretaceous, very rare: Older Formations, increasing 

 northward. 117-220 days. Sea level-3,365 ft. 



2. H. canadense Michx. In woods: Mass. to N. Car., 111. and 

 Ky. 



Known in our range only from near Nockamixon Rocks, Bucks 

 Co., Pa., a region south of the moraine, having a growing season of 

 about 176 days, and underlaid by Mesozoic formations; and along 

 the Delaware in Warren Co., N. J.; formerly reported from S. I. 



2. Nyctelea Scop. (Ellisia L. Macrocalyx True). 



1. N. Nyctelea (L.) Britton. In moist soil: N. J. to Minn., 

 the N. W. Terr., Va., Neb. and Kan. 

 N. Y. Port Washington, N. Y. City. 

 N. J. Very rare in Mercer and Hunterdon counties, near the 



Delaware River; unknown elsewhere. 

 Pa. Bucks and Philadelphia counties. 



3. Phacelia J uss. 



Corolla-lobes entire. I. P.dubia. 



Corolla-lobes nearly rotate, its lobes fimbriate. 2. P. Purshii. 



