PIPER FLORA OF THE STATE OF WASIIINCJTON. 295 



13. Arabis suifrutescens S. Wats. Proc. Am. Acad. 17: 362. 1SS2. 



Type locality: "Bluffs of the Snake River and vicinit}', Union County, Oregon." 

 Collected by Cusick. 



Range: Washington and Oregon. 



Speclmens examined: Mount Adams, S uJcsdorf 9S, oil. 



14. Arabis latifolia (S. Wats.). 



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



Arabis lemmoni S. Wat;, Proc. Am. Acad. 22: 4(57. 1887. 



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



Range: Washington to Montana and California. 



Specimens examined: Mount .Ulams, S uksdoif 5>^9, 510, 1920; Henderson 2391. 



15. Arabis drummondii A. Gray, Proc. Am. Acad. 6: 187. 18(33-05. 



Turiitls stricta (Irahani, Edinh. New Phil. Journ. 1829: 350. 1829, not Arabis stricta, 

 Host. 1827. 



Streptanthus angusfifoUus Nutt.; Torr. & Gr. Fl. 1 : 76. 1838, not Andiis amjustifoUus Lam. 

 1783. 



Type locality': Rocky Mountains. Collected by Drummond. 



Range: California and Colorado, northward into British America. 



Specimens examined: Olj^mpic Mountains, Piper 2181; Clallam County, Elmer 2693 

 in })art; Mount Rainier, Piper 2065; north of Mount Adams, Henderson 2397; Mount 

 Baker, FlcU 859; Horseshoe Basin, Lake d' Hull, August 24, 1892: Stevens Pass, Sand- 

 berg cfe Leiberg 764. 



Zonal distribution: Hudsonian. 



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



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



Type locality: "In the mountains from Washington Territory to Mono Pass in the 

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



Range: British Columbia to California and Utah. 



Specimens examined: Oh^mpic Mountains, Piyft'/" 2180; Flett 94; Mount Rainier, P/yjf/' 

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

 Henderson 2390; S uksdorf 50S, 96; Hoii:ell 557; A.shnola River, Cascade Mountains, Lyall ; 

 Blue Mountains, Horner 282. 



Zonal distribution: Arctic. 



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

 Type locality: "Rock}- "Mountains." Collected by Nuttall. 

 R.\nge: Washington to Wyoming and Nevada. 

 Specimens examined: White Salmon, SM^-Sfior/ 2. 



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



Type locality: "On rocky ridges, Union Country, Oregon." Collected b}' Cusick. 



Range: Washington and Oregon. 



Specimens examined: Ellensburg, Piper 2711; Cleman 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, Suksdoif 1921 : Pine City, Piper 2828, 2829, the latter ambiguous toward^, sparsi- 

 jlora. 



Zonal distribution: Arid Transition. 



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

 doif's list, but wc have seen no Washington specinif^iis. 



