PTPER FLORA OF THE STATE OF WASHINGTON. 601 



24. Senecio triangularis Ilook. Fl. Bor. Am. 1: 332. 1833. 

 Senecio longidentatus DC. Prod. 6: 428. 1837. 



Senecio gibbonsii Greene, Pittonia 2: 20. 1889. 



Type locality: Rocky Mountains. Collected by Drummond. 



Range: 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. gibbonsii 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. Tills 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: 3.5. 1895. 



Type locality: "In wet meadows, top of Siskiyou Mountains near Waldo, Oregon." 

 Range: British Columbia to California. 

 Specimens examined: East of Mount Adams, Henderson 2310. 



25. Senecio serra Hook. Fl. Bor. Am. 1: 333. 1833. 



Type locality: "Common on the banks of the Wallawallah, Spokan, and Flathead 

 riveis." Collected by Douglas. 



Range: Washington to Wyoming and Colorado. 



Specimens examined: EUensburg, Whifed 702, 495; North Yakima, Steinweg 894; 

 Egbert Springs, Sandberg cfe Leiberg 392; Kooskooskie to Walla Walla, Wilkes Expedition 

 521; along Coppei River, Horner 356; Pullman, Piper 1609; Cow Creek, Griffiths cfe Cotton 

 527; Rattlesnake Mountains, Cotton 675. 



Zonal distribution : Arid Transition. 



25a. Senecio serra lanceolatus (Torr. & Gr.). 



Senecio lanceolatus Torr. & Gr. Fl. 2: 440. 1843. 



Senecio andinus iiuit. Trans. Am. Phil. Soc. 7: 409. 1841, not Buek. 1840. 



Senecio serra integriusculus A. Gray, Syn. Fl. 1^: 387. 1884. 



Type locality: "Rocky Mountains." Collected by Nuttall, probably in Wyoming. 



Range: Washington tg Wyoming and Califcrnia. 



Specimens examined: Atanum Soda Springs, Wat(, 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 . flif alius fremontii Torr. & Gr. Fl. 

 2: 444. 



Type locality: "Wind River Chain, Rocky Mountains." 



Range: British Columbia to California and Colorado. 



Specimens examined: Mount Rainier, ^ZZcn 144; Piper 2146; Bridge Creek, fi'/mcr 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 \. A. stenopliyUa. 



Plants with surculose stolons 2. A. leucophaea. 



