MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 475 



It is characterized by the presence of floating leaves, which are 

 reniform in outline and 3-5-cleft with cuneate toothed lobes. In still 

 water. 



Montana: Columbia Falls, 1894, R. S. Williams, ggi. 



On page 169, before Thalictrum venulosum, insert: 

 Thalictrum sparsiflorum Turcz. ; Fish. & Mey. Ind. Sem. Petrop. 

 I : 40 [Man. R. M. 5 ; Syn. Fl. i' : 15]. 



In woods in the mountain regions, at an altitude of 1000-2000 m. 

 Montana : Missoula, 1898, Williams & Gri-ffiths. 



On page 171, before FUMARIACEAE, insert: 

 PAPAVERACEAE. 

 Papaver nudicaule arcticum Elkan, Mon. Pap. 16 [Syn. Fl. i' : 89] ; 

 Papaz'c?- jindicaule Coulter, Man. R. M. 13. 

 Alpine peaks, at an altitude of about 3000 m. 

 Montana: Stanton Lake, 1894, R. S. Williams, gg2. 



Before CRUCIFERAE, insert : 

 *Capnoidessempervirens (L.) Borck. ; Roem. Arch, i- : 44 [111. Fl. 



2: 105]; Fumaria scmpcrvirens L. Sp. PI. 700; Corydalis 



s:;laiica Pursh, Fl. Am. Sept. 463 [Syn. Fl. i' : 97]. 



A tall species with glaucous foliage., pink and 3'ellow flowers, and 

 long slender pods. In waste places, along the railroads. Introduced 

 from the East. 



Montana: Nyack, 1894, R. S. Williams. 



On page 174, before Barbarea Americana, insert: 

 * Sisymbrium officinale (L.) Scop. Fl. Carn. Ed. 2, 2: 26 [111. Fl. 



2: 116: Syn. Fl. i^ : 137 ; Bot. Cal. I : 41]. 



A tall introduced weed with lyrate leaves, the lobes generally di- 

 varicate or reflexed, small yellow flowers, and slender terete siliques 

 which taper upward and are erect and appressed to the stem. In 

 waste places. 



Montana : Missoula, 1899, -/• ^^^- Blankinskip. 



On page 185, after Sophia intermedia, insert: 



* Sophia gracilis. 



Very slender, 1-2 dm. high, finely puberulent, somewhat branched ; 

 leaves 1-3 cm. long, almost simply pinnatifid ; lobes linear to oblong, 

 obtuse; raceme simple, constituting about one-half the plant; flowers 

 very small, light yellow ; pedicels at first erect, later ascending, 1-2 



