122 FLORA OF MOUNT DESERT. 318 H. scabrum, Mx. ROUGH HAWKWEED. BR. D+ T Woods and roadsides; common. C.B.P.D.Rdu.L.S.K.A.Car.XC. Prenanthes, L. (Nabalus, Cass.) RATTLESNAKE-ROOT. 319 P. serpentaria, Pursh. Nabalus Fraseri, DC. C.QS.K.D+ Dry soil; common. 320 Var. nana (DC.), Gray. Nabalus nanus, DC. Common on mountain summits and rocky places. Green Mt. C.BH. (Wm. C. Lane); Sargent Mt.; Pemetic Mt.; Jordan Mt.; Beech Cliff; Sutton Island, etc. (Rand). Intallicent (?) 9R. 321 P. altissima, L. WOOD RATTLESNAKE-ROOT. ma T yr+ 884- Rich damp woods; frequent. A form with dark purple his- pidulous stems, Southwest Valley road (Rand). Pie J. B. RduL. XC. BR. Price TARAXACUM, Haller. DANDELION. 322 T. OFFICINALE, Web. T. Dens-leonis, Desf. DANDELION. G0 ma C.B.P.Q Becoming common; roadsides and waste places, sometimes even in woods. Naturalized from Europe. Pie.V.Carl. RduL.S.W.K. XC. BR. Price D. 9R. LACTUCA, L. LETTUCE. 323 L. SATIVA, L. GARDEN LETTUCE. Persistent for years in waste ground, Fernald Point (Rand). Escaped from cultivation. 324 L. Canadensis, L. WILD LETTUCE. 9R. Dar. Roadside and clearings; frequent. B.RduL.S.A.Car.XC.BP. Price 325 L. integrifolia, Bigel. Dry soil; infrequent. Northeast Harbor (John L. Wake- field, Rand); Somesville; Frenchman Camp (Redfield). BKCarl. 326 L. leucophæa (Willd.), Gray. BLUE LETTUCE. RH T C.B.S.K.XC. Low grounds, roadsides, and waste places; common. BR.Pice D.Dar. yr+