PIPER FLORA OF THE STATE OF WASHINGTON, 261 



Petals shorter than the pungent, lanceolate 1-nerved 



sepals 5. A.franliinii. 



Petals wanting; plants minute, usually purplish 8. .1. piisUla. 



Valves of the capsule entire. 

 Petals present. 



Leaves linear or lance-linear; marsh jilants with soft and 



flaccid leaves and stems . 6. ^4. jxiludicola. 



Leaves subulate or filiform, rather rigid. 



Sepals obtuse 11. A. sajiuifnsis. 



Sepals acute or cuspidate. 



Plants densely matted or tufted, alpine; cymes 

 few-flowered. 



Herbage glandular; .sepals not strongly nerved . 10. A. nuUallii. 

 Herbage not glandular; sepals strongly neived . 9. A. vcrna. 

 Plants loosely or not at all matted; cymes dichoto- 

 mously branched, several to many-flowered; low- 

 land plant 7. A. tenella. 



1. Arenaria serpyllifoiia L. Sp. PI. 1: 423. 1753. 

 Type locality: Europe. 



Specimens examined: Fairhaven, Piper, July, 1897; Whidby Island, Gardner 369; 

 Seattle, Piper 551; Taconia, Flett 2022; Clarke County, Sulsdorf \mi>, 101. 



2. Arenaria capillaris Poir. Encycl. 6: 380. 1804. 

 Type locality: "Dans la Siberie." 



Range: British Columbia to California and Utah. Siberia. 



Specimens examined: Cascade Mountains, latitude 49°, Lyall in 1860; head of Twisp 

 River, Whited 211; Wenache Mountains, Whited 1283; Nason Creek, Sandherg & Leiberg 

 681; Horseshoe Basin, Lake & Hull 486; without locality, Brandegee 674; Mount Carlton, 

 Kreager 238; Wenache Mountains, Cotton 1187. 



Zonal distribution: Arctic. 



2a. Arenaria capillaris nardifolia(Ledeb.) Regel, Bull.Soc. Nat.Mosc. 35: 253. 1830. 



Arenaria nardifolia Ledeb. Ic. Fl. Ross. 1: 4. pi. 6. 1829. 



Type locality: "Hab. in rupibus alpium Altaicarum." 



Range: Alaska to California and Utah. Siberia. 



Specimens examined: Olympic Mountains, Fleit 806; Mount Rainier, Pi/w 620, 2121 ; 

 Allen 238; Mount Stuart, Elmer 1115; Klickitat River, Flett 1059. 



Zonal distribution; Arctic. 



3. Arenaria congesta Nutt.; Torr. & Gr. Fl. 1: 178. 1838. 



Type locality : ' 'vShady hills in the Rocky Mountain range, about Bear River of the 

 Lake of Timpanagos." Collected by Nuttall. 



R.\NGE: Washington to California and Colorado. 



Specimens examined; Chelan, Whited 1377; Conconully, Whited 1320; White Bluff, 

 LaTce cfc Hull 485; Wilson Creek, Lake cfc Hull 482; Loon Lake, Winsfon, July 20, 1897; 

 Spokane, Spaulding; Suksdorf 252; Piper, June, 1897; Blue Mountains, Lake & Hull, 

 July, 1892; Piper, July, 1896; Clarks Springs, Kreager 100. 



Zonal distribution: Arid Transition. 



4. Arenaria glabrescens (S. Wats.) 



Arenaria fendleri glabrescens S. Wats. Bot. King Expk)r. 40. 1871. 



Arenaria fendleri subcongesta S. Wats. loc. cit. 



Arenana burkei Howell, Fl. N. W. Am. 85. 1897. 



Type locality': Toyabe Mountains, Nevada. 



Range: Washington to Alberta, Arizona, and California. 



