408 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



ConconuUy, Whited 1313: Spokane, Piper 2634; Henderson 2467; Nile, Henderson 2464; 

 Sprague, Lake cfc Hull, August, 1892. 

 2k)NAL distribution: Arid Transition. 



2. Gayophytum diffiisiun Torr. & Gr. Fl. 1 : 513. 1840. 



TiPE locality: "Rocky Mountains and plains of Oregon." Collected by Nuttall. 



Range: Washington and Idaho to California and Colorado. 



Specimens examined: Wenache, Whited; along Methow River, Whited 220; Loomis- 

 ton, Elmer 609; Lake Chelan, Lake cfc Hull, August, 1892; Klickitat River, Flett 1406; 

 Columbia River, latitude 46° to 49°, Lyall in 1860; without localit}', Geyer 546. 



Zonal distribution: Arid Transition. 



3. Gayophytiun ramosissiinuin Torr. & Gr. Fl. 1: 513. 1840. 

 TiPE ixxALiTV: RtK'ky Mountains. Collected by Nuttall. 

 Range: Washington and Montana to California and Arizona. 



Specimens examined: Mount Adams, Suksdorf 2310, 2297, 2296, 2295, 22; Henderson, 

 August, 1892; Mount Rainier, Piper, August, 1895; Falcon Valley, Sriksdorf 2257 , 20, 21; 

 North Yakima, Piper, June, 1897; Henderson, Ma\', 1892; Wenache, Whited in 1896; 

 Washtucna, FAmer 1042; Peshastin, Sandberg <t Leiberg 528; Cascade Mountains, Piper, 

 July, 1895; Nason City, Sandberg d; Leiberg, July, 1893; without locality, Brandegee 781; 

 Ritzville, Sandberg dk Leiberg 159; without locality', Va^ey in 1889; Blue Mountains, 

 Homer 293, 292; Walla Walla, NutiaU. 



Zonal distribltiox: Arid Transition. 



Hooker a recognizes two subspecies, but evidently his names have become interchanged 

 in respect to the characters. 



Capsules short, the fruiting pedicels refracted G. rarhosissimum strictipes. 



Capsules longer, cane.scent , pedicels erect in fruit G. ramosissimum deilexum. 



4. Gayophytum pumilum S. Wats. Proc. Am. Acad. 18: 193. 1883. 



TiPE locality: "From San Bernardino County, California, to Washington Territory." 



Range: Washington to California. 



Specimens examined: Mount Adams, Suksdorf 376; Falcon Valley, Suksdorf, June, 

 1881, and 19; Klickitat River. Suksdorf S2; bars of Touchet River, //orner 286; near 

 Salmon River, Horner 284; Blue Mountains, Homer 317, 119; Skamania County, Flett 

 1236. 



Zonal distribution: Canadian? 



Gayophytum racemosum Torr. & Gr., and Gayophytum caesium Torr. & Gr. Both 

 these names, which are considered to represent one species, appear in Suksdorf 's list. The 

 type of the latter was collected in " Oregon, on dry open plains near Walla Walla," by Nut- 

 tall, possibly a Washington locality, but many of Nuttall's plants so labelled were collected 

 far to the southeast of Wallula (Old Fort Walla Walla). At any rate we have seen no Wash- 

 ington specimens of the plant, those labelled G. racemosum being as a rule G. ramosissimum. 



PACHYLOPHUS. 



Leaves green, glabrous, except the villous margins 1 . P. marginatus. 



Leaves canescent-puberulent on both sides 2. P. canescens. 



1. Pachylophus marg^atus (Nutt.) 



Oenothera marginata Nutt.; Torr. & Gr. Fl. 1 : 500. 1840. 



Type locality: "Rocky Mountains in Upper California, about lat. 42°," probably in 

 Idaho. Collected by Nuttall. 



Specimens examined: Steptoe Canyon, McKay. 



Zonal distribution: Upper Sonoran. 



oLond. Joum. Bot. 6: 224. 1847. 



