154 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



5. Sitanion latifolium Piper, Erythea 7: 99. 1899. 



Type locality: "Blue Mts., Walla Walla County, Wash." Collected by Piper. 



Range: Known only from the type specimen. 



Specimens examined: Blue Mountains, Walla Walla County, Piper, July, 1896. 



6. Sitanion basalticola Piper, Bull. Torr. Club 30: 234. 1903. 



Type locality: "In basaltic soil. Coulee City, Washington." Collected by Piper. 

 Range: Douglas County, Washington. 

 Specimens examined: Coulee City, Pij)er 3924. 

 Zonal distribution: Arid Transition. 



7. Sitanion ciliatum Elmer, Bot. Gaz. 36: 58. 1903. 



Type locality: "On dry rocky hills west of Wenatcheo," Washington. Collected by 

 Whited. 



Range: Washington. 



Specimens examined: Wenache Mountains, Whited 1360; Waterville, S. E. Jordan; 

 Coulee City, Piper 3923; Lincoln County, Sandberg tfe Leiberg 221 ; Bickleton, Suksdorf 127 . 



Zonal distribution: Arid Transition. 



8. Sitanion hystrix (Nutt.) J. G. Smith, U. S. Dept. Agr. Div. Agrost. Bull. 18: 15. 1899. 

 Aegilops Jiystrix Nutt. Gen. 1 : 86. 1818. 



Sitanion albescens Elmer, Bot. Gaz. 36: 57. 1903. 



Type locality: "Arid plains of the Missouri." 



Range: Washington to Wyoming and Colorado. 



Specimens examined: Ellensburg, Piper 2579; Whited 670; Snipes Mountain, Cotton 

 380; Pasco, Piper 2962; Coulee City, Piper 3921, 3922; Spokane, Piper, June 25, 1897; 

 Wenas, Griffiths & Cotton 76; Walla Walla, Leckenby, July, 1898. 



Zonal distribution: Upper Sonoran and Arid Transition. 



9. Sitanion velutinum Piper, Bull. Torr. Club 30: 233. 1903. 



Type locality: "Steptoe, Whitman County, Washington." Collected l)y Va.scy. 



Range: Eastern Washington. 



Specimens examined: Near Steptoe, Vasey. 



10. Sitanion planifoliiun J. G. Smith, U. S. Dept. Agr. Div. Agrost. Bull. 13: 19. l.:: n. 

 Type locality: "High mountains, Skamania County, Wash." Collected by Sul:f;('c .\ 

 Range: Mountains of Washington. 



Specimens examined: Olympic Mountains, Elmer 1903; Skamania County, Svksaorj 

 224. 



Zonal distribution: Arctic? 



1 1 . Sitanion rubescens Piper, Bull. Torr. Club 30 : 234. 1903. 



Type locality: "Dry rocky places, 2,300 m. altitude, Mount Rainier, Washington." 

 Collected by Piper. 



Specimens examined: Mount Rainier, Piper 1954. 

 Zonal distribution: Arctic. 



Munroa squarrosa Torr. and Bouteloua oligostaciiya Torr. are included in Suks- 

 dorf 's list. There is no direct evidence that either of these occurs in the State. 



CYPEEACEAE. Sedge Family. 



Flowers monoecious; akene inclosed in a sac-like structure 



(perigynium) Carex (p. 161) . 



Flowers perfect; spikelets all alike. 



Spikelets flattened, the scales 2-ranked. 



Perianth-bristles none ; inflorescence terminal Cyperus (p. 155). 



Perianth-bristles 6 to 9; inflorescence axillary Dulichium (p. 156) . 



