76 ROCHESTER ACADEMY OF SCIENCE. [Oct. 8, 



193. AMBROSIA Tourn. [L.] 



498. A. trifida L. Great Ragweed. 



Abundant along Honeoye creek, especially at Rush Junction, and at 

 the mouth of Oatka creek, Scottsville ; occasional elsewhere. Canan- 

 daigua lake, Miss Mary E. Macaulcy. 



499. A. artemisiaefolia L. Hogweed. Ragweed. 



Fields, roadsides, and waste places ; very common. 



194. XANTHIUM Tourn. [L.] 



500. X. STRUMARIUM L. COCKLE-BUR. 



Frequent about Rochester. Adams Basin. Wayne county. 



501. X. Canadense Mill. Cockle-bur. 



Along streams ; common. 



502. X. Canadense Mill. var. echinatum Gray. 



Same range as the preceding ; common. 



195. HE LI OPS IS Pers. 



503. H. lasvis Pers. \H . helianthoides (L.) B.S.P.] Ox-eye. 



River banks, ravines, and along streams ; common. 



504. H. scabra Dunal. [H . lavis var. scabra Torr. & Gray.) Rare. 



196. ECHIXA CEA Mcench. [Brauneria Neck.] 



505. E. angustifolia DC. [Brauneria pallida (Nutt.) Britton.] Purple 



Cone-flower. 



Introduced from the west. Railroad embankment, Adams Basin, 

 M. S. Baxter. 



197. RUDBECKIA L. 



506. R. laciniata L. Cone-flower. 



River banks, ravine sides, along streams ; common. 



507. R. hirta L. Yellow Daisy. Cone-flower. 



Fields ; very common. 



508. R. hirta L. var. . A form with band of dark brown at base of ray 



flowers was found in the town of Gates, near Rochester, in 1891, by Miss 

 Beckwith ; again in 1892 and 1893. See Proc. Roch. Acad. Sc, Vol. II, 

 Broch. 2, pp. 170, 171 ; Broch. 3, p. 241. 



198. HELIANTHUS L. Sunflower. 



H. annuusL. Frequently spontaneous, but not permanent. 



509. H. divaricatus L. 



Dry woods, river banks, tops of ravines ; common. 



510. H. strumosus L. 



River banks, sides of ravines, copses, in rich and usually moist soil. 



511. H. strumosus L. var. mollis Torr. & Gray. \H . strumosus macro- 



phyllus (Willd.) Britton.] Rare. Greece, Bradley. 



512. H. decapetalus L. 



River banks and ravines ; not common. 



