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Rh WEST VIRGINIA GEOLOGICAL SURVEY

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ful proliferation when young. This effect, according to Dr. Britten, formed the type of the Linnaean species, Datisca hirta (L. Sp. PI. 1037) collected by Kalm near Philadelphia, Pa. R. glabra L. Smooth Sumach. Frequent or very common in all parts of the State, in rocky or barren soils. Randolph : Point Mountain, alt. 2,200 ft. ; Cheat Mountains, alt. 2,700-3,600 ft. Cabell : near Barboursville (James). Summers: near Hinton. Fayette: near Nuttallburg, not common (Nuttall). Hardy: near Moorefield (Gamble). R. COPALLINA L. Dwarf Sumach. Dry fields and rocky places. Wood : near Lockhart's Run, plentiful. Webster: Buffalo Bull Mountains, alt. 2,575 itRandolph: Cheat Mountains, alt. 3,200 ft.; near Hodam (H. H. Smith 1527). Preston: near Aurora (Mr. & Mrs. Steele). Monongalia : near Ice's Ferry. Fayette : near Nuttallburg, alt. 2,000 ft., common (Nuttall) ; and frequent throughout the State. Mercer: Beaver Springs and Ingleside. R. verNix L. Poison Sumach. Poison Elder. (R. venenata DC.) Swampy places. Randolph : Stalnaker Run. Preston : near Terra Alta, infrequent. R. RAdicaNS L. Poison Vine. Poison Ivy. Including (R. toxi codendron L.). Thickets and low grounds, very common throughout the State. Monongalia : abundant everywhere in the neighbor hood of streams. Webster: Buffalo Bull Mountains, alt. 2,100 ft. (Millspaugh) ; Hacker Valley (H. H. Smith 1532). Kanawha: Pocotaligo. Gilmer: near Glenville (Mapel). Fayette: near Nuttallburg (Nuttall). Summers: near Hin ton. Mason : near Point Pleasant. Mercer : Princeton, near Ingleside and Wills., R. aromatica Ait. Fragrant Sumach. (R. canadensis Marsh.). Dry or stony soils. Brooke : roadside between Wellsburg and Bethany College (Mertz & Guttenberg). Hardy: near Moorefield (Gamble). COTINUS Adans. C. coTiNoiDES (Nutt.) Britten. (Rhus cotinoides Nutt.). Established near Morgantown, Monongalia Co. (Sheldon.)