600 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



18. Senecio hydrophiloides Rydberg, Mem. N. Y. Bot. Gard. 1: 441. 1900.^ 

 Type locality: Idaho. 



Range: Washington to Montana. 



Specimens examined: Spokane, Piper, July 2, 1896; Spokane County, Svhidorf 370; 

 Ramm, July, 1883; Clarks Springs, Kreager 55; Falcon Valley, Suksdorf, July 5, 1881. 

 Zonal distribution: Arid Transition. 



19. Senecio foetidus Howell, Fl. N. W. Am. 1: 377. 1900. 

 Type locality: Klickitat Valley, Washington. 



Range: Known only from the type locality. 

 Specimens examined: Klickitat Valley, lloweU 224. 



20. Senecio vaseyi Greenman, sp. nov. ^ 



An herbaceous perennial, more or less pubescent throughout with jointed crisp hirsutish 

 hairs, later glabrate; stem erect, 4 to 7 cm. high, simple; leaves elliptic-ovate to lanceolate, 

 5 to 10 cm. long, 1 to 4 cm. broad, acute or obtu.se, entire or inconspicuously denticulate, 

 narrowed at the base into a winged petiole; the upper leaves remote, lanceolate from a 

 sessile sulx-lasping base; inflorescence a simple or compound corymbose cyme; heads 

 medium-sized, 10 to 12 mm. high, discoid; involucre campanulate, sparingly bracteolate; 

 bracts of the involucre 12 to 18, linear-lanceolate, acute, black-tipped; achenes glabrous. 

 Washington: without definite locality, coll. of 1889, G. R. Vasey, no. 568 (hb. Gray); in 

 and near the Ca.scade Mountains of Kittitas, Chelan, and King counties, coll. of 1889, G. R. 

 Vasey, without number (hb. Piper); Klickitat River, Cascade Mountains, August 3, 1892, 

 L. F. Henderson (hb. Piper); Chewaukum, Whited 2532; Spipen [Nnchcs] River to Colum- 

 bia River, Wilkes Expedition. California: Mount Shasta, altitude 7,5(X) feet, August 23, 

 1881, C. G. Pringle, no. 6 (hb. Gray and hb. Field Mus.); Lassens Peak, coll. of 1875, 

 J. G. Lemmon (hb. Gray). 



21. Senecio exaltatus Nutt. Trans. Am. Phil. Soc. 7: 410. 1841. 



Type locality: "The plains of the Oregon, near the mouth of the Wahlamet." 

 Range: Washington and Idaho to California. 



Specimens examined: Pullman, Piper 1608; uppt>r Atanum River, Henderson 2311. 

 2k)NAL distribution: Transition. 



21a. Senecio exaltatus ochraceus nom. nov. 



Senecio cordatus Nutt. Trans. Am. Phil. Soc. 7: 411. 1841, not Koch, 1834. 



Senecio lugens ochrdeucus A. Gray, Syn. Fl. 1^: 388. 1884, not S. ochroleucus Hook. & 

 Arn. 1841. 



Type locality: "Near the outlet of the Wahlamet." 



Range: British Columbia to California. 



Specimens examined: Mount Rainier, Flett 2167; Klickitat County, Suksdorf 23; 

 Howell in 1879; Goat Mountain, Allen 230; High Prairie, Klickitat County, Suksdorf m20; 

 Simcoe Mountains, Howell, June, 1881; Wenache Mountains, Cotton 1196; Ellensbuig, 

 Piper, May 20, 1897; without locality, Vasey in 1889. 



Zonal distribution: Transition. 



22. Senecio atriapiculatus Rydberg, Mem. N. Y. Bot. Gard. 1: 442. 1900. 



Senecio columbianus Greene, Pittonia 3: 170. 19(X), not S. renifolius columbiensis A. Gray . 

 188!. 

 Type locality: None definitely given. 

 Range: British Columbia to Washington and Montana. 

 Specimens examined: Mount C&rhon, Kreager 242; Wenache, Whited 88. 

 Zonal distribution: Arid Transition. 



23. Senecio condensatus Greene, Pittonia 3: 298. 1898. 



Type locality: "High ridges of the Blue Moimtains, Walla Walla Co., Washington." 

 Collected by Piper. 



Specimens examined: Blue Mountains, Ptpcr 2434; Waitsburg, Z/orricr, April 17,1897. 



