Composite. 129 



into slxort margined petioles. Rays usually 10. — Thickets 

 and river-banks. 



8. H. gigante'US, L. stem tall, hairy or rough, branch- 

 ing above. Leaves lanceolate, pointed, serrate, very rough 

 above, hairy below, narrowed and ciliate at the base. 

 Heads somewhat corymbed, not large. Disk yellow; rays 

 pale yellow, 15-20. — Low grounds, western and south- 

 western Ontario, 



9. H. tubero'SUS, L., (Jerusalem Abticiiokb) has escaped 

 from cultivation in some places. It is at once recognized 

 ■by its tubers. 



38. ACTINOM'ERIS, Nntt. 

 A. squarro'sa, Nutt. stem hairy, tall, commonly winged 

 above. Leaves oblong to ovate-lanceolate, pointed at both 

 ends. — S. W. Ontario. 



39. COREOP'SIS, L. TiCKSEED. 



1. C. tineto'Pia, Nutt. Stem smooth, 2-3 feet high. 

 Leaves once- or twice-pinnately divided, the lobes narrow. 

 Pappus none. Aohenes oblong. Rays yellow, Srovm-tinted. 

 -N. W. 



2. C. triehosperm'a, Michx., var. tenuilo'ba, Gray. 

 (TiOKSEED Sunflower.) Stem smooth, branching. Bays 

 golden-yellow. Leaves short-petioled, pinnately divided, the 

 segments serrate. Aohenes narrowly wedge-oblong , 2-toothed. 

 — Swamps, S. W. Ontario. 



3. C. verticilla'ta, L. Glabrous. Leaves sessile, divided 

 into 3 sessile leaflets (appearing whorled), these pinnately 

 dissected into very narrow divisions. — Damp places, S. W. 

 Ontario. 



4. C. trip'teriS, L. Smooth. Stem tall, corymbed abbve. 



Leaves petioled, pinnately divided, the divisions lanceolate, 



acute, entire. Disk turning brownish. — Damp places, S.W. 



Ontario. 



40. GArLIiAKDTA, Foug. 



G. arista'ta, Pursh. Bough-hairy, about 2 feet high. 

 Leaves lanceolate to oblanceolate, entire to coarsely pinnat- 

 iiid.^Dry soil, N. W. 



