PIPER—FLORA OF THE STATE OF WASHINGTON. 601 
24. Senecio triangularis Hook. Fl. Bor. Am. 1: 332. 1833. 
Senecio longidentatus DC. Prod. 6: 428. 1837. 
Senecio gibbonsti Greene, Pittonia 2: 20. 1889. 
Tyre Locauity: Rocky Mountains. Collected by Drummond. 
RanaGe: British Columbia to Saskatchewan, south to California and Colorado. 
SPECIMENS EXAMINED: Mount Rainier, Piper 2154; Mount Adams, Flett 1083; Stevens 
Pass, Sandberg & Leiberg 732; Stampede Tunnel, Henderson, July 26, 1892; Bridge Creek, 
Elmer 647; Blue Mountains, Horner 344. 
ZONAL DISTRIBUTION: Canadian and Hudsonian, occasionally Transtion. 
The type of S. gibbonsit Greene was collected in salt marshes at the mouth of the Colum- 
bia River. The original specimen has the leaves only few-toothed, but abundant material 
collected by the writer just above Astoria in salt marshes seems in every way typical S. tri- 
angularis. This is a remarkable station for the species, which is usually subalpine in its 
habitat. 
24a. Senecio triangularis subvestitus (Howell) Greenman. 
Senecio subvestitus Howell, Erythea 3: 35. 1895. ‘ 
Type Locauity: “In wet meadows, top of Siskiyou Mountains near Waldo, Oregon.” 
Rance: British Columbia to California. 
SPECIMENS EXAMINED: East of Mount Adams, //enderson 2310. 
25. Senecio serra Hook. Fl. Bor. Am. 1: 338. 1833. 
Type Locauiry: ‘Common on the banks of the Wallawallah, Spokan, and Flathead 
rivers.”’ Collected by Douglas. 
Rance: Washington to Wyoming and Colorado. 
SPECIMENS EXAMINED: Ellensburg, Whited 702, 495; North Yakima, Steinweg 894; 
Egbert Springs, Sandberg & Leiherg 392; Kooskooskie to Walla Walla, Wilkes Expedition 
521; along Coppei River, Horner 356; Pullman, Piper 1609; Cow Creek, Griffiths & Cotton 
527; Rattlesnake Mountains, Cotton 675. 
ZONAL DISTRIBUTION: Arid Transition. 
25a. Senecio serra lanceolatus (Torr. & Gr.). 
Senecio lanceolatus Torr. & Gr. Fl. 2: 440. 1848. 
Senecio andinus Nutt. Trans. Am. Phil. Soc. 7: 409. 1841, not Buek. 1840. 
Senecio serra integriusculus A. Gray, Syn. Fl. 1°: 387. 1884. 
Type Locauity: “Rocky Mountains.’’ Collected by Nuttall, probably in Wyoming. 
Rance: Washington to Wyoming and California. 
SPECIMENS EXAMINED: Atanum Soda Springs, Watt, August, 1895; Cascade Mountains, 
Tweedy, August, 1882; Falcon Valley, Suksdorf, July 28, 1882; Waitsburg, Horner 572. 
ZONAL DIsTRIBUTION: Arid Transition. 
26. Senecio ductoris nom. nov. 
Senecio fremonti Torr. & Gr. Fl. 2: 445. 1843, not S. filifolius fremontit Torr. & Gr. FI. 
2: 444. 
Type Locauity: “Wind River Chain, Rocky Mountains.” 
RanGeE: British Columbia to California and Colorado. 
SPECIMENS EXAMINED: Mount Rainier, Allen 144; Piper 2146; Bridge Creek, Elmer 695; 
Olympic Mountains, Piper 2201. 
ZONAL DISTRIBUTION: Arctic. 
ANTENNARIA. 
Pappus bristles of the staminate flowers not dilated at tip. 
Heads several, brown. 
Plants without stolons. .............-.-.-2---+-+--+-+-- 1. A. stenophylla. 
Plants with surculose stolons............-.-2-.--------- 2. A. leucophaea. 
