338 FLORA OF PHILADELPHIA. 



Lancaster — (P.)- Northampton — Easton, Porter (B. C.)- 

 9. Helianthus tuberosus L. Jerusalem Artichoke. M. p. 996. Waste 

 places. Summer. 



35. VERBESINA L. Crown-beard. 

 1. Verbesina alternifolia (L.) Britton. M. p. 997. Rich soil. Autumn, 

 Philadelphia— Gray 's Ferry, Dr. Geo. Smith (Fu.) (W. Tr.), Upper 

 Wissahickou (Je.), Woodlands Cemetery (Mac.) (Te.), Maylandville 

 Bridge, Dr. Geo. Smith (B. Sm.). Delaware— ^ ear Sandy Bank (Fu.). 

 Chester — (P.) . Lancaster — Susquehanna Valley. Northampton — (P.). 

 DawpMn ^Steelton (Wn.). 



Burlington — Burlington (C). Camden — Kaighn 's Point (Li.). 

 New Castle— TioWj Oak (U. C. S.), Landlith. 



36. COREOPSIS L. Tickseed. 



Rays pink or occasionally white ; leaves linear, entire. 1. C. rosea. 



Rays yellow throughout. 



Stem-leaves sessile or petioled, entire, or the lower 3-5-lobed; achenes 

 often with a callous at each end of the inner side. 2. C. auricxdata. 

 Leaves petioled, all but the upper 3-5-divided ; rays entire. 



3. C. tripteris. 



1. Coreopsis rosea Nutt. M. p. 998. Sandy, grassy swamps. Summer. 



Bucks— Bristol, Mart. (B. C). 



Burlington — Burlington (C), Florence (Mac). Gloucester — Clayton, 

 Franklinville (C). Cumberland — Vineland (C). Atlantic — Egg Har- 

 bor, Main Road Station (C), Hammonton (Cr.). Ocean— Forked River 

 (Ja.) (Wn.). 



New Castle Sassafras X-roads, Canby. 



2. Coreopsis auriculata L. M. p. 999. Woods. Summer. 



Philadelphia — Bartram 's Garden (Te.). 



3. Coreopsis tripteris L. M. p. 999. Moist woods and thickets. Summer 



and fall. 



37. BIDENS L. 



Plants terrestrial, erect; leaves simple or divided. 



Leaves lanceolate, serrate, imdivided, rarely lobed. 



Rays present, large and conspicuous, twice as long as the disk or 



longer. 1. B. laevis. 



Rays small, not more than twice as long as the disk, sometimes very 

 short or wanting. 

 Heads nodding after flowering. 2. B. cernua. 



Heads persistently erect. 



Pappus-awns downwardly barbed. 



Involucral bracts not foliaceous; stem purple; flowers 



orange. 3. B. connata. 



Involucral bracts foliaceous : stem straw-color ; flow- 

 ers greenish -yellow. 4. B. comosa. 

 Pappus-awns upwardly barbed. 5. B. bident aides. 

 Leaves, some or all of them, pinnately 1-3-parted or dissected. 

 Rays rudimentary, none, or very short. 



Achenes flat ; leaves, some or all of them, 1-3-divided. 

 Outer involucral bracts 4-8 ; achenes nearly black. 



Achenes 4-4.5 mm. long ; awns vei'y short ; outer 

 bracts 4. 6. B. discoidea. 



