548 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Cape Horn, Pijier 5011; Chenowith, SuJcsdorf 21S3. 

 Zonal distribution: Humid Transition. 



6. Hieracium scouleri Hook. Fl. Bor. Am. 1: 298. 1834. 



Type locality: "Mouth of the Columbia." Collected by Scouler. 



Range: British Columbia to Montana and Utah. 



Specimens examined: Nason Creek, Sandberg c& Leiberg 671; Colvillc, Lyall in 1860; 

 Spokane County, C. A. Ramin, July, 1883; Svksdorf 'SS5; Mount Carlton, Kreager 244; 

 along the Tukanon River, Lake cfc Hull, July 4, 1892; PuHman, Piper 1614; Bishop's Bar, 

 Snake River, Piper 2885. 



Zonal cistribution: Transition. 



The relations of this and the two following need careful field study. The diffcrtmces are 

 wholly of pubescence, and inasmuch »is the different types frequently occur growing togetlior, 

 the character may be onlj' of formal value. 



7. Hieracium griseum Rydberg, Mem. N. Y. Bot. Gard. 1: 465. 1900. 

 Type locality: Jack Creek, Montana. 



Range: Washington to Montana. 



Specimens examined: Mount Adams, i'?<ts(Zor/*; Lake Park, Pi7)cr 2160 in part; Iwt ween 

 Olympia and Gate City, Heller 4053; mouth of Columbia, Scouler; Wenache Mountains, 

 Whited 1187 in part; Cotton 1744; Chelan, Whited 214; Lake Chelan, Lake <& Hull 741; 

 Chelan, Elmer 496. 



Zonal distribution: Transition. 



8. Hieracium cynoglossoides Arvet-Touv. Spicil. Hier. 20. 1881. 

 Hieracium amplum Greene, Erythca 3: 101. 1895. 



Type locality: "North Western Wyoming." 



Range: British Columbia to Wyoming and Oregon. 



Specimens examined: Whidby Island, Gardner 117; Mount Adams, Suksdorf 2255; 

 Lake Park, Piper 2160 in part; Falcon Valley, Suksdorf 42Cr, Klickitat River, Flett 1085, 

 1077; Peshastin, Sandberg tfe Leiberg 526; Fish Lake, Dunn, August 8, 1902; Wenache 

 Mountains, Whited 1187 in part; Tieton River, Cotton 440; Loon Lake, Winston, July 20, 

 1897; without locality, Vasey .561, 562; Elma, Heller 4063; Loomis. Elmer 550. 



2k)NAL distribution: Transition. 



NAB ALUS. 



1. Nabalus hastata (Less.) Heller, Muhlenbcirgia 1: 8. 1900. 



Sonchus hastatus Less. Linnaea 6: 99. 1831. 



Nabalus alatus Hook. Fl. Bor. Aul 1: 294. 1833. 



Prenanthes alata A. Gray, Syn. Fl. 12; 435. 1884. 



Type locality: " In Unalaschka." 



Range: Alaska to Oregon and Idaho. 



Specimens examined: Cascades, latitude 4^, Lyall in 1859; Olympic Mountains, Piper 

 in 1890; Snoqualmie Falls, Piper, St!pteiiiber, 1902; Monte Cristo, Misses Coffin & Good- 

 speed; Wind River, Flett 1084; Stevens Pass, Whited 1461; Snoqualmie Pass, Piper; 

 without locality, Vasey 558; mouth of Queets River, Conard 325. 



Zonal distribution: Canadian and Iludsonian. 



LACTUCA. 



Pappus brown ; flowers whitish ■. 1 . L. spicata. 



Pappus white. 



Flowers yellow ; leaves spiny 2. L. scariola. 



Flowers blue; leaves not spiny 3. L. pulchella. 



