8o ' ROCHESTER ACADEMY OF SCIENCE. [Oct. 8, 



zig. HIERACIUM Tourn. [L.] 



556. H. AURANTIACU.M L. 



Riga, Miss F. Bcckiuith. Pavilion, Genesee county, /. B. Fuller. 

 Holley, Orleans county, Prof. Lennon. Abundant at these places. 

 Becoming a pest at Kendall, Orleans county. 



557. H. Canadense Michx. 



Dry woods and roadsides ; common. 



558. H. paniculatum L. 



Dry open woods ; frequent. 

 55g. H. venosum L. Rattlesnake-weed. 

 Dry woods and copses ; frequent. 



560. H. Marianum Willd. 



Rare. Rochester, Ulrs. Mary E. Streeter. 



561. H. scabrum Michx. 



Dry open woods ; frequent. 



220. CREPIS L. 



562. C. BIENNIS L. 



Rare. School grounds, Fairport, Miss Mary E. Macaiiky. 



563. C. TECTOKUM L. 



Scarce. Mount Hope, 1866, and roadside. Culver park, 1882, J. B. 

 Fuller. Neglected lawn, East avenue. Brighton, Dr. C. M. Booth. 

 Brockport, Prof. Letinon. 



221. PRENANTHES Vaill. [L.] 



564. P. alba L. {Nabalus albus Hook.) White Lettuce. 



Rich woods and river banks ; common. 



565. P. serpentaria Pursh. [IVabalus Fraseri DC.) Lion's-foot. 



Dry woods ; frequent, especially on the sandy ridges about Ironde- 

 quoit bay and creek. 



566. P. altissima L. {Nababis altissimus Hook.) 



Moist shaded soil along river banks and in ravines ; frequent. 



222. TARAXACUM Haller. 



567. T. OFFICINALE Weber. (7! Dens-leojiis Desf.) [T. Taraxacum (L.) 



Karst.] Dandelion. 

 Very common everywhere in grass. 



223. LACTUCA Tourn. I L.] 



568. L. SCARiOLA L. Prickly Lettuce. 



Waste grounds and roadsides. Abundant in several places in and 

 near the city of Rochester. 



569. L. Canadensis L. Wild Lettuce. 



Borders of fields and woods ; common. 



570. L. leucopha;a Gray. [Mulgcdium leticophcctitn DC.) \Lactuca spicata 



(Lam. J A. S. Hitch.] Blue Lettuce. 

 Borders of woods, low grounds ; common. 



— L. sativa L., Garden Lettuce, escapes to roadsides occasionally. 



