PIPER FLORA OF THE STATE OF WASHINGTON. 411 



Specimens examined: Seattle, Smith 411; Falcon Valley, Suksdorf 37S, 558; foothills 

 Blue Mountains, Horner 176; Blue Mountains, Horner, August, 1896; Spokane, Piper, 

 June, 1897, Sandberg, McDougal, <& Heller, 905; Pullman, Henderson 2470; Piper 2657; 

 2655; Wawawai, Elmer 757; Piper, June 23, 1901; Squaw Creek, Cotton 877; Rattlesnake 

 Mountains, Cotton 690. 



Zonal distribution: Transition. 



3. Boisduvalia glabeUa (Nutt.) Walp. Repert. 2: 89. 1843. 

 Oenothera glabella Nutt.; Torr. & Gr. Fl. 1 : 505. 1840. 



Type locality: "Plains of the Oregon east of Wallawallah." Collected by Nuttall. 

 Range: British Columbia to Montana and California. 

 Specimens examined: Pullman, Piper 26.56; Hull, July, 1892. 

 Zonal distribution: Arid Transition. 



CLARKIA. 



Petals entire 1. C. rhomboidea. 



Petals 3-lobed 2. C. pulchdla. 



1. Clarkia rhomboidea Dougl.; Hook. Fl. Bor. Am. 1: 214. 1833. 



Type locality: "From the Great Falls of the Columbia to the Rocky Mountains." 

 Collected by Douglas. 



Range: Washington and Idaho to Nevada and California. 



Specimens examined: Wenache Region, Brandegee 780; Wenache Gulch, Whited 1165; 

 Klickitat River, Flett 1234; Cascade Mountains, Mrs. Steinweg in 1894; Stehekin, Whited, 

 July 5, 1901; Loon Lake, Winston, July 20, 1897; without locality, Vasey 2S8; without 

 locality, Lyall in 1861 ; Blue Mountains, Piper, July, 1896. 



Zonal distribution: Arid Transition. 



2. Clarkia pulcheUa Pursh, Fl. 1: 260. 1814. 



Type locality: "On the Kooskooskee and Clark's Rivers." Collected by Lewis. The 

 first locality is in Idaho, opposite the town of Kamiah, the Camp Chopunnish, where Lewis 

 collected many plants.' 



Range: Washington and Idaho to California. 



Specimens examined: North Yakima, Mrs. Steinweg in 1894; Pasco, Hindshaw 38; 

 Columbia River, latitude 46° to 49°, Lyall in 1861; between Coulee City and Waterville, 

 Spillman, May, 1896; Sprague, Henderson, May, 1892; Sandberg cfe Leiberg 211; Tukanon 

 River, Lake cfe Hull 531; Pullman, Piper 1630; Tampico, Flett 1232; Colville Reservation, 

 Griffiths cfc Cotton 376. 



Zonal distribution: Arid Transition and Upper Sonoran. 



HALORAGIDACEAE. Water Milfoil Family. 



Stamen 1 ; ovary 1-celled Hippuris. 



Stamens 2 to 8; ovary 2 to 4-celled Myriophyllum. 



HIPPTJRIS. Marestail. 



Alpine plant 2 to 5 cm. high I. H. montana. 



Lowland plant 20 to 50 cm. high 2. H. vulgaris. 



1. Hippuris vulgaris L. Sp.-Pl. 1: 4. 1753. 



Type locality: European. 



Range: Arctic regions, southward to California, New Mexico, and Maine. Europe, 

 Asia. 



