648 CICHORIACEAE 



11. H. Gronovii L. In dry soil: Mass. to Ont., 111., Fla. and Tex. 

 Scattered throughout the area, more common southward than 

 elsewhere. 



Hieracium floribundum Wimm. & Grab, has been collected as a waif in Conn. ; H. 

 murorum L. was found many years ago in waste grounds, Prospect Park, Brooklyn. 



14. Nabalus Cass. 



Bracts of the involucre glabrous, or with a few scattered hairs. 

 Heads 5-7 flowered; involucre very narrow; light green, 2 mm. 



thick; pappus light straw color. I. A', altissimus. 



Heads 8-16 flowered; involucre broader, green, purple or 

 glaucous, 3-6 mm. thick. 

 Leaves or some of them lobed, divided or pinnatifid; 

 involucre about 3 mm. thick. 

 Pappus deep cinnamon-brown. 2. N. albus. 



Pappus straw color or light brown. 

 Inflorescence paniculate 



Panicle branches divergent. 3. A 7 , serpentarius. 



Panicle branches erect or ascending. 4. N. trifoliolatus. 



Inflorescence thyrsoid or glomerate; southern 5. N. virgatus. 

 Leaves irregularly dentate or denticulate. 3. N. serpentarius. 



Bracts of the involucre hirsute-pubescent. 6. N. racemosus. 



i. N. altissimus (L.) Hook. In woods and thickets: Newf. to 

 Man., south to Ga. and Tenn. 

 Conn. Throughout the state. 

 N. Y. On the north side of L. I., not reported from the south side; 



on S. I., thence increasing northward. 

 N. J. Rare in Burlington Co., west of the pine-barrens, frequent 



or common north of the coastal plain. 

 Pa. Throughout. 



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

 northward. 117-220 days. Sea level-3,980 ft. 



2. N. albus (L.) Hook. In woods: Me. and Ont. to Man., south 



to Ga. and Ky. 



Conn. Rare along the coast, increasing northwestward. 



N. Y. Common on the north side of L. I., unknown on the south 

 side, or in the Bronx, rare on S. I., thence increasing northward. 



N. J. Rare in Burlington and Salem counties, west of the pine- 

 barrens, thence increasing northward, 



Pa. Northampton, Montgomery, Bucks, Delaware and Chester 

 counties. 

 Tertiary, o: Cretaceous, rare: Older Formations, increasing 



northward. 117-220 days. Sea level-3,980 ft. 



