PLANTS OF SOUTHERN NEW JERSEY. 769 



RUDBECKIA L. 

 Rudbeckia laciniata L. Tall Cone-flower. 



Rudbeckia laciniata Linnaeus, Sp. PI. go6. 1753 [Virginia and Canada]. — 

 Knieskern 18. — Britton 144. 



Low damp thickets or along* streams ; frequent in the northern 

 counties and less common southward in the Middle district, 

 especially along the Delaware. 



Fl. — Late July to late September. 



Middle District. — Monmouth and Ocean Cos. (Kn), New Egypt, Delair, 

 Crosswicks (C), Kaighns Pt., Mickleton, Swedesboro. 



HELIANTHUS L. 



Key to the Species. 



a. Disc purple or brownish. 



b. Leaves Hnear. H. angustifolius, p. 769 



bb. Leaves broad, ovate. {H. annuus]* 



aa. Dish yellow or yellowish. 



b. Leaves prevailingly lanceolate, scabrous at least above. 



c. Stem scabrous at least above, leaves sessile or nearly so, hirsute 

 beneath. H. giganteiis, p. 770 



cc. Stem glabrous, leaves sessile by a truncate base. 



H. divaricatus, p. 770 

 bb. Leaves prevailingly ovate or oblong. 



c. Sessile, stem glabrous. H. divaricattis, p. 770 



cc. Petioled. 



d. Stem puberulent or glabrous. 



e. Leaves membranaceous, regularly serrate. 



H. decapetalus, p. 770 



ee. Leaves firmer, less serrate or entire. H. stninwsus, p. 771 



dd. Stem hispid. [H. tuberosus]f 



Helianthus angustifolius Linnaeus. Narrow-leaved Sunflower. 



Helianthus angustifolius Linnaeus, Sp. PI. 906. 1753 [Virginia]. — Pursh, Fl. 

 Am. Sept. IL 572. 1814. — Knieskern 18. — Willis 33. — Britton 145. — 

 Keller and Brown 337. 



Frequent in swamps of the Pine Barrens and Cape May penin- 

 sula, also rarely in "Pine Barren islands" in the Middle district 

 and on the coast. Recorded but once north of our limits, near 

 Trenton. 



* Common Sunflower, escaped from gardens. 

 t Jerusalem Artichoke, escaped from cultivation. 

 49 MUS 



