578 CONTKIBUTIONS FROM THE NATIONAL IIERBAKIUM. 



BLEPHARIPAPPUS. 



1. Blepharipappus glandulosus Hook. Fl. Bor. Am. 1: 31G. 1833. 



Layia glandulosa Hook. & Am. Bot. Beech. Voy. 358. 1840. 



Type locality: "On the plains of the Columbia in sandy soils." Collected by Douglas. 



Ranue: British Columbia to California and New Mexico. 



Specimens examined: Yakima Mountains, Mrs. Steinweg; Tlenderson in 1891 ; Rockland, 

 Suksdorf2M; Pasco, fipf?' 2955; Hindshaio 21; Sunnyside, Co<to?i 350; junction Crab and 

 Wilson creeks, Samlberg c& 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 Fails." Collected by Douglas. Not since found. We incline to the view of Dr. 

 Gray, that this is merely an aberrant form of B. glanditlosus 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. 



Bh}>hani>appus scaber Hook. Fl. Bor. Am. 1: 316. 1833. 



Type locality: "Sandy plains of the Columbia." Collected by Douglas. 



Range: Washington and Idalio to California and Nevada. 



Specimens examined: Rock Lake, Sandberg ct- Leiberg 119, Spokane, Wilkes Expedi- 

 tion; Spangle, Piper 2876; Tukanon River, Blue Mountains, Lake & Hull 723. 



Zonal distribution: Arid Transition. 



BIDENS. Beggar ticks. 



Plant aquatic; submerged leaves capillary 3. B. beckii. 



Plants terrestrial. 



Rays none, leaves pinnately 3 to 5-divided 1- B. vulgata. 



Ravs conspicuous ; leaves lanceolate, serrate 2. B. cernua. 



1. Bidens vulgata Greene, Pittonia 4: 72. 1899. 

 Type locality- None given. 



Range: Washington to New York south to California and Virginia. 



Specimens examined: West Klickitat County, Suksdorf 1591, 412; North Yakima, 

 Wait, August, 1895; Loomiston, Elmer 611; Rock Lake, Lake dc Hull, August 3, 1892; 

 Spokane, //fTifZer-son, July 10, 1892; Wawawai, Piper 1863, Chewe\a.h, Kreager 527; with- 

 out locality, Brarulegee 895 



Zonal distribution: Upper Sonoran and Arid Transition. 



2. Biden3 cernua L. Sp. PI. 2: 832. 1753. 



Bidens cernua elliptica Wiegand. Bull Torr. Club 28: 417. 189r». 



Bidens lonchophylla Greene, Pittonia 4: 2.58. 1901. 



Bidens macounii Greene, loc. cit. 



Type locality: "Habitat in Europa ad fontes & fossas." 



Range: British Columbia to Labrador south to California and North Carolina. Europe. 

 Asia. 



Specimens examined: Coupeville, Gardner 148; Ilwaco, Flenderson, September 7, 1892; 

 T&conm, 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. 



