296 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



STREPTANTHUS. 



1. Streptanthus longirostris S. Wats. Proc. Am. Acad. 25: 127. 1890. 



Arabis longirostria S. Wats. Bot. King Explor. 17: pZ. 2. 1871. 



Type locality: "Growing in alkaline soil at the Steamboat Springs near Washoe City, 

 about Huml)oldt Lake, Xevada, and on Stansliury Island in Salt Lake." 



Range: Washington to Nevada and Utah. 



Specimens examined: Pasco, Herulerfion 237H: without lucality, Brarulefjee &19. 



Zonal distribution: Upper Sonoran. 



RORIPA. 



Flowers white ; leaves pinnately divided 1 . R. nasturtium. 



Flowers yellow; leaves various, mostly pinnate. 

 Plants perennial by rootstocks. 



Pods glabrous or nearlyso 2. R. sinuata. 



Pods not glabrous. 



Pods pappilose-puberulent 3. R. calycina. 



Pods soft pubescent, short-pediceled 4. /?. columhiae. 



Plants annual or biennial, without rootstocks. 



Pedicels short, 2 to 4 mm. long; stems diffuse. 



Pods curved ; leaf-lobes acute b. R. currisiliqua. 



Pods straight ; leaf-lobes obtuse G, R. ohtusa. 



Pedicels longer, 6 to 8 mm. long; stems erect. 



Pods oval or globose; stems hispid 7. R. his'pida. 



Pods oblong; stems glabrous or nearly so. 



Pods 4 to 8 mm. long 8. R. palustris. 



Pods 8 to 12 mm. long 9. ^. pacifica. 



1. Roripa nasturtium (L.) Rusby, Mem. Torr. Club 3^: .5. 1893. Water cress. 

 Sisymhriuin nasturtium L. Sp. PI. 2: 657. 1753. 



Nasturtium officinale R. Br. m Ait. Hort. Kew. ed. 2. 4: 110. 1812. 

 Type locality: "Habitat in Europa & America septentrionali ad fontes." 

 Specimens examined: Tacoma, FZf« 6; Wawawai, £■//«<?/• 765; Hull 477; Clarks Springs, 

 Kreager 124; Colvillc, Krenger 523. 



2. Roripa sinuata (Nutt.) A. S. Hitchcock, Spring Fl. Manliat. 18. 1894. 

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



Type locality: "Banks of the Oregon and its tributaries." Collected by JNuttall. 

 Range: Washington to Saskatchewan, Arkansas, and New Mexico. 

 Specimens examined: West Klickitat County, Suksdorf 2103; Almota, Piper 2653, 2654. 

 Zonal distribution: Upper Sonoran. 



3. Roripa calycina (Engchn.) Rydberg, Mem. N. Y. Bot. Gard. 1: 175. 1900. 

 Nasturtium calijanum Engehii. in Warren, Prelim. Rep. 156. 1855-7. 



Type locality: "Sandy bottoms of Yellowstone River; Fort Sarpy to Fort Union." 



Range: Washington and Oregon to Montana. 



Specimens examined: Without locality, Sandherg cfc Leiherg in 1892. 



4. Roripa columbiae Suksdorf; Howell, Fl. N. W. Am. 1: 40. 1897. 

 Nasturtium siauatum columbiae Suksdorf; Robinson in Gray, Syn. Fl. 1': 147. 1895. 

 Nasturtium columbiae Suksdorf, Deutsch. Bot. Monat. 16: 211. 1898. 



Type locality: "Low gravelly banks of the Columbia River near Bingen," Washington. 

 Range: Oregon and Washington on gravelly river banks. 

 Specimens examined: Near Bingen, Suksdorf 952. 



