PIPER — FLORA OF THE STATE OF WASHINGTON. 297 



5. Roripa curvisiliqua (Hook.) Bessey, Mem. Torr. Club 5: 169. 1894. 

 Sisymbrium curvisiliqua Hook. Fl. Bor. Am. 1: 61. 1830. 

 Nasturtium, curvisiliqua Nutt; Torr. & Gr. Fl. 1: 73. 1838. 

 Nasturtium curvisiliqua nuttallii S. Wats, in Gray, Syn. Fl. 1 : 148. 1895. 



Type locality: "Common on the Northwest coast of America, lat. 47°-48°, in sandy 

 soils, near streams." Collected by Douglas. 



Range: British Columbia to Wyoming and Lower California. 



Specimens examined: Montesano, Heller 3852; Seattle, Piper 1840; Tacoma, Flett 36 

 Sk&meLnisiCounty, Suksdorf 517; FedconYeiWey, Sulcsdorf 576, 1900; Bingen,yiS'uA:sfZor/'2361 

 Skokomish River, Piper in 1890; Ellensburg, Whited 674; Kalama, Piper, October 31 , 1901 

 Roslyn, Whited 1205; Spokane, Dewart, July 15, 1901; October 11, 1900; Pullman, Elmer 

 819; Piper U74, 1840; Lake cfe Hull 476; Tumw&ter C&njon, Sandberg & Leiberg 522; 

 Spokane, Kreager 559. • 



Zonal distribution: Transition. 



A very variable species divided by Nuttall into four, namely, Nasturtium lyratum, 

 N. polymorphum, N. cernuum, and N. curvisiliqua.a If there are good characters to 

 separate these, they remain to be pointed out. The type specimen of lyratum has an 

 evident style; that of polymorphum is almost obsolete. 



6. Roripa obtusa (Nutt.) Britton, Mem. Torr. Club 6: 169. 1894. 

 Nasturtium obtusum Nutt.; Torr. & Gr. Fl. 1 : 74. 1838. 



Type ix)CAL1ty: " Banks of the Mississippi." 



Range: British Columbia to Michigan, California, and Texas. 



Specimens examined: Falcon Valley, Suksdorf 2300; Bingen, Suksdorf 2299, 2353; 

 Lake Chelan, Elmer, September, 1897, Spokane County, Suksdorf \^\. 



The Bingen specimens have been referred to R. tenerrima Greene, but they seem not 

 distinct from B. obtusa. The species is variable. 



7. Roripa palustris (L.) Besser, Enum. 27. 1822. 

 Sisymbrium amphibium palustre L. Sp. PI. 2: 657. 1753. 

 Nasturtium terrestre R. Br. in Ait. Hort. Kew. ed. 2. 4: 110. 1812. 

 Nasturtium palustre DC. Syst. 2: 191. 1821. 



Type locality: Europe. 



Range: Subarctic regions, south to California and North Carolina. Europe. Asia. 

 Specimens examined: Seattle, Piper, July 10, 1895; Lake Union, Suksdorf 1903; 

 Colville, Lyall in 1860; Ulk, Kreager 3-53; Wenache, Whited. 

 Zonal distribution: Transition. 



8. Roripa paciftca Howell, Fl. N. W. Am. 40. 1897. 

 Roripa clavata Rydberg, Bull. Torr. Club 29: 235. 1902. 



Nasturtium terrestre occidentale S. Wats, in Gray, Syn. Fl. 1': 148. 1895, not Nasturtium 

 occidentale Greene, Fl. Fran. 268. 1891. 



Type locality: Shumagin Islands, Alaska. 



Range: Alaska to Oregon. 



Specimens examined: Cascade Mountains, latitude 49°, Lyall in 1858-59; west Klickitat 

 County, Suksdorf 519, 721; Peshastin, Sandberg & Leiberg 509; Waitsburg, Horner 83; 

 Hoquiam, Lamb 1221. 



Zonal distribution: Transition. 



9. Roripa hispida (Desv.) Britton, Mem. Torr. Club 5: 169. 1894. 

 Brachylobus hispidus Desv. Journ. Bot. 3: 183. 1814. 



Nasturtium terrestre hispidum Fisch. & Mey. Ind. Sem. Hort. Petrop. 3: 41. 1837. 

 Nasturtium hispidum DC. ?>y si. 2: 2Q1.1%21. ' . 



Type locality: "Habitat in Pennsylvania." 



oTorr. & Gr. Fl. 1: 73, 74. 1838. 



