PIPER FLORA OF THE STATE OF WASHINGTON. 295 



13. Arabis suflfnitescens S. Wats. Proc. Am. Acad. 17: 362. 1882. 



Type locality: "Bluffs of the Snake River and vicinity, Union County, Oregon." 

 Collected by Cusick. 



Range: Washington and Oregon. 



Specimens examined: Mount Adams, Suksdorf 98, 511. 



14. Arabis latifolia (S. Wats.). 



Arabis canescens latifolia S. Wats. Bot. King Explor. 17. 1871. 



Arabis lemmoni S. Wat::^. Proc. Am. Acad. 22: 467. 1887. 



Type locality: Clover Mountains, Nevada. Collected by Watson. 



Range: Washington to Montana and California. 



Specimens examined: Mount Adams, Suksdorf 509, 510, 1920; Henderson 2391. 



15. Arabis druimnondii A. Gray, Proc. Am. Acad. 6: 187. 1863-65. 



Turritis stricta Graham, Edinb. New Phil. Journ. 1829: 350. 1829, not Arabis stricia, 

 Host. 1827. 



Streptanthus angustifolius Nutt.; Torr. & Gr. Fl. 1 : 76. 1838, not Arabis angustifolius Lam. 

 1783. 



Type locality: Rocky Mountains. Collected by Drummond. 



Range: California and Colorado, northward into British America. 



Specimens examined: Olympic Mountains, Piper 2181; Clallam County, Elmer 2693 

 in part; Mount Rainier, Piper 2065; north of Mount Adams, Henderson 2397; Mount 

 Baker, Flett 859; Horseshoe Basin, Lake & Hull, August 24, 1892; Stevens Pass, Sand- 

 berg 6s Leiberg 764. 



Zonal distribution: Hudsonian. 



16. Arabis lyallii S. Wats. Proc. Am. Acad. 11: 122. 1876. 



Arabis drummondii alpina S. Wats. Bot. King Explor. 18. 1871, not A. alpina L. 



Type locality: "In the mountains from VVashington Territory to Mono Pa.ss in tiie 

 Sierra Nevada and eastward to W. Wyoming and Utah." 



Range: British Columbia to California and Utah. 



Specimens examined: Olympic Mountains, Piper 2180; Flett 94; Mount Rainier, Piper 

 2066, 2064; Smith 801; Allen 299; Clallam County, Elmer 2693 in part; Mount Adams, 

 Henderson 2390; Suksdorf 608, 96; Howell 557; Ashnola River, Cascade Mountains, Lyall ; 

 Blue Mountains, Horner 282. 



Zonal distribution: Arctic. 



17. Arabis microphylla Nutt.: Torr. & Gr. Fl. 1: 82. 1838. 

 Type locality: "Rocky Mountains." Collected by Nuttall. 

 Range: Washington to Wyoming and Nevada. 

 Specimens examined: White Salmon, 5'«^sdor/' 2. 



18. Arabis cusickii S. Wats. Proc. Am. Acad. 17: 363. 1882. 



Type locality: "On rocky ridges. Union Count}', Oregon." Collected by Cusick. 



Range: Washington and Oregon. 



Specimens examined: Ellensburg, Piper 2711; Cleraan Mountain, Henderson 2388 in 

 part; Johnson Canyon, Brandegee 624; Rock Creek, Sandberg & Leiberg 92; between 

 Coulee City and Waterville, Spillman, May, 1896; Coulee City, Piper 3841; Spokane 

 County, Suksdorf 1921 ; Pine City, Piper 2828, 2829, the latter ambiguous toward A.sparsi- 

 fora. 



Zonal distribution: Arid Transition. 



Arabis breweri S. Wats. Proc. Am. Acad. 1 1 : 123. 1876. This species appears in Suks- 

 dorf 's list, but wc have seen no Washington specimens. 



