108 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3. Stipa thurberiana Piper, U. S. Dopt. Agr. Div. Agrost. Citx-. 27: 10. 1900. 



Stipa occidentalis Thurh. But. Wilkes Exped. 48;?. 1874, not Thurb. But. King Explor. 

 380. 1871. 



Type lcx-ality: "North Brancli of the Coliunbia." Collected b\- the Wilkes Expedi- 

 tion. 



Range: Washington to Nevada and California. 



Specimens examineo: Wenaohe, Whited 1230; Sunnyside, Cotton 487; North Yakima, 

 Leckenhy, Mav, 1898; Henderson 225.5; Ellensbui^, Piper 2(>11; North Branch Columbia 

 River, Wilkes Expedition: Douglas County, Sandherg d' Leiberg 269; Wilson Ci-eek, 

 Sandberg cC* Leiberg, June, 1893; between Coulee City and Waterville, Spillman, May, 1896; 

 Spokane, Piper 2613: Coulee City, PijH-r 3919; Epiirata. Griffiths cfe Cotton All; Yakima, 

 Griffiths d' Cotton 50. 



ZoNAi- uiSTRiBiTiox: l'p[x'r Sonoraii aiid Arid Transit ion. 



4. Stipa lemmoni (Vasey) Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 30: 3. 1901. • 

 Stipa pringlei lemmoni Vasey, Contr. Nat. Herb. 3:55. 1892. 



Stipa lemmoni jonesii Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 30: 4. 1901. 



Type i>ocality: Mohawk Valley, Plumas County, California, according to the label of the 

 type specimen. 



Range: Washington to California. 



Specimens examined : West Klickitat County, Suksdorf 146, 56; Simcoc Mountains, 

 Howell 8; Wenache Mountains, Cotton 1263; Perkins Creek, Cotton 1613. 



Zonal oistkibition: Arid Transition. 



5. Stipa williamsii Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11:45. 1898. 



Type locality: Dry soil on the west side of Big Horn Mountain, near Monument 

 Spring, Wyo. 



Range: Washington to Oregon and Wyoming. 



Specimens examined: Colvillc Reservation, Griffiths <fc Cotton 390; Loomis, Griffiths c& 

 Cotton 328, 335. 



Zonal distribution: Arid Transition. 



6. Stipa minor (Vasey) Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 46. 1898. 

 Stipa viridula minor Vasey, Contr. U. S. Nat. Herb. 3: 50. 1892. 



Type locality: Kelso Mountain, near Torrey Peak, Colorado, according to the \&he\ 

 of the type specimen. 



Range: Washington to Colorado and W'yoming. 



Specimens examined: Olympic Mountains, Elmer 1900; Mount Adams, <SMi(r«<for/' 147; 

 Nisqually, Wilkes Expedition; Steptoe, Vasey, June, 1900; Palouse City, F. D. Cloud, 

 June, 1895; Pullman, Piper 1762; Brewster, Griffiths dc Cotton 258, 259; Colville Reserva- 

 tion, Griffiths cfc Cotton 391 ; Wenache Mountains, Cotton 1304. 



Zonal distribution: Transition, mostly Arid. 



7. Stipa nelsoni Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 46. 1898. 

 Type locality: " Woods Landing, Albany County, Wyoming " 

 Range: Washington and Oregon to Wyoming. 



Specimens examined: Rattlesnake Mountains, Cotton 687; Cow Creek, Griffiths cfc 

 Cotton 517; Steamboat Rock, Griffiths cfc Cotton 433. 

 Zonal distribution: Arid Transition. 



8. Stipa comata Trin. & Rupr. Gram. Agrost. 3: 75. 1842. 

 Stipa juncea L. err. det. Nutt. Gen. 1: 58. 1818. 



Stipa capillata L. err. det. Hook. Fl. Bor. Am. 2: 237. 1839. 



Type locality: "Carlton House Fort ad fl. Saskatchawan." 



Range: British Columbia to Alberta southward to California and New Mexico. 



