578 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
BLEPHARIPAPPUS. 
1. Blepharipappus glandulosus Hook. FI. Bor. Am. 1: 316. 1833. 
Layia glandulosa Hook. & Arn. Bot. Beech. Voy. 358. 1840. 
Type Locauity: “On the plains of the Columbia in sandy soils.” Collected by Douglas. 
Rance: British Columbia to California and New Mexico. 
SPECIMENS EXAMINED: Yakima Mountains, Mrs. Steinweg; Henderson in 1891; Rockland, 
Suksdorf 284; Pasco, Piper 2955; Hindshaw 21; Sunnyside, Cotton 350; junction Crab and 
Wilson creeks, Sandberg & Leiberg 299; Wallula, Cotton 1038. 
ZONAL DISTRIBUTION: Arid Transition and Upper Sonoran. 
BLEPHARIPAPPUS OREGANUS Greene, Pitttonia 2: 247. 1892. Layia douglasii Hook. & 
Arn. Bot. Beech. Voy. 358. 1841, not Calliglossa douglassi Hook. & Arn. op. cit. 356. 
Type locality: “On the gravelly islands of the Columbia between the Narrows and the 
Great Falls.” Collected by Douglas. Not since found. We incline to the view of Dr. 
Gray, that this is merely an aberrant form of B. glandulosus Hook. with stouter and nearly 
naked pappus bristles. In other characters it can not be distinguished. 
PTILONELLA. 
1. Ptilonella scabra (Hook.) Nutt. Trans. Am. Phil. Soc. 7: 386. 1841. 
Blepharipappus scaber Hook. Fl. Bor. Am. 1: 316. 1833. 
TyPE Loca.ity: ‘Sandy plains of the Columbia.” Collected by Douglas. 
Rance: Washington and Idaho to California and Nevada. , 
SPECIMENS EXAMINED: Rock Lake, Sandberg & Leiberg 119, Spokane, Wilkes Expedi- 
tion; Spangle, Piper 2876; Tukanon River, Blue Mountains, Lake & Hull 723. 
ZONAL DISTRIBUTION: Arid Transition. 
BIDENS. Beacar Ticks. 
Plant aquatic; submerged leaves capillary..........................-.- 3. B. beckii. 
Plants terrestrial. 
Rays none; leaves pinnately 3 to 5-divided..... . eee eee ee ee ee ee 1. B. vulgata. 
Rays conspicuous; leaves lanceolate, serrate.................-....-.- 2. B. cernua. 
1. Bidens vulgata Greene, Pittonia 4: 72. 1899. 
Tyre LocaLity: None given. 
Rance: Washington to New York south to California and Virginia. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 1591, 412; North Yakima, 
Watt, August, 1895; Loomiston, Elmer 611; Rock Lake, Lake & Hull, August 3, 1892; 
Spokane, Henderson, July 10, 1892; Wawawai, Piper 1863, Chewelah, Kreager 527; with- 
out locality, Brandegee 895 
ZONAL DISTRIBUTION: Upper Sonoran and Arid Transition. 
2. Bidens cernua L. Sp. Pl. 2: 832. 1753. 
Bidens cernua elliptica Wiegand. Bull. Torr. Club 26: 417. 1899. 
Bidens lonchophylla Greene, Pittonia 4: 258. 1901. 
Bidens.macounii Greene, loc. cit. 
Type Loca.ity: “Habitat in Europa ad fontes & fossas.’”’ 
Rance: British Columbia to Labrador south to California and North Carolina. Europe. 
Asia. 
SPECIMENS EXAMINED: Coupeville, Gardner 148; Ilwaco, Henderson, September 7, 1892; 
Tacoma, Flett 157. Ellensburg, Whited 592; Puyallup, Piper, September 2, 1899; Spokane, 
Piper; Falcon Valley, Suksdorf 1592; Sumas, Lyall; Spangle, Suksdorf 932; Waitsburg, 
Horner 22, 333; Newport, Piper 4210; Kittitas County, Cotton 1763. 
