600 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
18. Senecio hydrophiloides Rydberg, Mem. N. Y. Bot. Gard. 1: 441. 1900. 
Type Locaity: Idaho. 
Rance: Washington to Montana. 
SPECIMENS EXAMINED: Spokane, Piper, July 2, 1896; Spokane County, Suksdorf 376; 
Ramm, July, 1883; Clarks Springs, Kreager 55; Falcon Valley, Suksdorf, July 5, 1881. 
ZONAL bistRIBUTION: Arid Transition. 
19. Senecio foetidus Howell, Fl. N. W. Am. 1: 377. 1900. 
Type Locatity: Klickitat Valley, Washington. 
Rance: Known only from the type locality. 
SPECIMENS EXAMINED: Klickitat Valley, Howell 224. 
20. Senecio vaseyi Greenman, sp. nov. 
An herbaceous perennial, more or Jess 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 em. broad, acute or obtuse, entire or inconspicuously denticulate, 
narrowed at the base into a winged petiole; the upper leaves remote, lanceolate from a 
sessile subclasping 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 Cascade 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 [Naches] River to Colum- 
bia River, Wilkes Expedition. CAttrorNta: Mount Shasta, altitude 7,500 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. 
Tyre Locaitry: “The plains of the Oregon, near the mouth of the Wahlamet.”’ 
RanGe: Washington and Idaho to California. 
SPECIMENS EXAMINED: Pullman, Piper 1608; upper Atanum River, Henderson 2311. 
ZONAL DISTRIBUTION: Transition. 
2la. Senecio exaltatus ochraceus nom. nov. 
Senecio cordatus Nutt. Trans. Am. Phil. Soc. 7: 411. 1841, not Koch, 1834. 
Senecio lugens ochroleucus A, Gray, Syn. Fl. 12: 388. 1884, not S. ochroleucus Hook. & 
Arn. 1841, 
Type Locauiry: “Near the outlet of the Wahlamet.”’ 
Rance: 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 1620; 
Simcoe Mountains, Howell, June, 1881; Wenache Mountains, Cotton 1196; Ellensburg, 
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 8: 170. 1900, not S. renifolius columbiensis A. Gray. 
1881. 
TyPe Loca.ity: None definitely given. 
RanGe: British Columbia to Washington and Montana. 
SPECIMENS EXAMINED: Mount Carlton, Areager 242; Wenache, Whited 88. 
ZONAL DISTRIBUTION: Arid Transition. 
23. Senecio condensatus Greene, Pittonia 3: 298. 1898. 
Tyree Locatiry: “High ridges of the Blue Mountains, Walla Walla Co., Washington.” 
Collected by Piper. 
SPECIMENS EXAMINED: Blue Mountains, Piper 2434; Waitsburg, Horner, April 17, 1897. 
