PIPER- — FLORA OF TTTE STATE OF WASHINGTON, 601 



24. Senecio triangularis Hook. Fl. Bor. Am. 1: 332. 1S33. 

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



Senecio gibbonsii Greene, Pittonia 2: 20. 1889. 



Type locality: Rocky Mountaiii.s. Collected by Drumnioiid. 



Range: British Columbia to Saskatchewan, south to Cahfornia and Colorado. 



Specimens examined: Mount Rainier, Piper 2154; Mount Adams, Flett 1083; Stevens 

 Pass, Sandberg S Leiberg 732; Stampede Tunnel, Tlender-son, July 26, 1892; Brido;e (!reek, 

 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 orif];inal 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. iri- 

 (ingularis. This is a remarkable station for the species, whicli is usually sui)alpine in its 

 habitat. 



24a. Senecio triangularis subvestitus (Howell) Grecnman. 

 Senecio subvestihts Howell, Erythea 3: 3.5. 189.5. 



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

 Range: British Columbia to California. 

 Specimens examined: P^ast of Mount .Vdams, Henderson 2310. 



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



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

 rivers." Collected by Douglas. 



Range: Washington to Wyoming and Colorado. 



Specimens examined: Ellensburg, Whited 702, 495; North Yakima, Steimveg 894; 

 Egbert Springs, Sandberg d' Leiberg .392; Koo.skooskie to Walla Walla, WiJhes Expedition 

 .521 ; along Coppei River, Horner 356; Pullman, Pijitr 1609; Cow Creek, (rrljfi/lis d^ Cotton 

 527; Rattlesnake Mountains, Cotton 675. 



Zonal distribution:. Arid Transition. 



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



Semrlo lanceolatus Torr. Sc Gr. Fl. 2: 440. 1843. 



Senecio andinus Nutt. Trans. Am. Phil. Soc. 7: 409. 1841, not Buck. 1S40. 



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



Type locality: "Rocky Mountains." Collected by Nuttall, proi)ably in Wyoming. 



Range: Washington to Wyoming and California. 



Specimens examined: Atanum Soda Springs, Watt, August, 1895; Cascade Mountains, 

 Tweedy, August, 1882: Falcon Valley, SuJcsdorf, July 28, 1882; Waitsburg, Hormr 572. 



Zonal distribution: Arid Transition. 



26. Senecio ductoris nom. nov. 



Senecio fremonti Torr. & Gr. Fl. 2: 445. 1843, not S. flifoliusfrewontri Torr. & Gr. Fl. 

 2: 444. 



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



Range: British Columbia to California and Colorado. 



Specimens examined: Mount Rainier, ^4/ZfA) 144; P(7w2146; Bridge Creek, E/wfr 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. stenopTiyEa. 



Plants with surculose stolons 2. ^4. leucophaea. 



