PIPER FLORA OF THE STATE OF WASHINGTON. 383 



1. Callitriche palustris L. Sp. PI. 2: 969. 1753. 

 Callitriche.autumnalis L. Fl. Sueo. ed. 2. 2. 1755. 

 Type locality: "Habitat in Europae fossis paludibus." 



Range: British Columbia to Oregon, Colorado, and Canada. Europe. 

 Specimens examined: Lake Cushman, Henderson 1862; mouth of the Columbia, 

 Scouler. 



2. Callitriche verna L. Fl. Suer. od. 2. 2. 1755. 

 Type locality: European. 



Range: Temperate regions of America, Europe, and Asia. 



Specimens examined: Hoquiam, Lamb 1012; North Yakima, Piper 1797; Mount 

 Rainier, Allen 185; Pullman, Piper, July 28, 1899. 



3. Callitriche bolanderi Hegelm. Verli. Bot. Verein Brandenb. 10: 116. 1868. 

 Type locality: Auburn, California. 



Range: Vancouver Island to California. 



Specimens examined: Clallam County, Elmer 2779; Lake Cushman, Piper 2236; 

 Seattle, Piper, July 12, 1895; Usk, Kreager 352; Tacoma, Flett 2262. 



EMPETRACEAE. Crowberry Family. 



EMPETRTJM. 



1. Empetrum nigrum L. Sp. PI. 2: 1022. 1753. Ckowbbrry. 



Type locality: European. 



Range: Arctic regions southward to Maine, Michigan, and Washington. Europe. Asia 

 Specimens examined: Mount Rainier, Piper 2051; Smith 1100; Copalis, Conard 409. 



LIMNANTHACEAE. Buckbean Family. 



FLOERKEA. 



1. Floerkea proserpinacoides Willd. Neue Schrift. Ges. Naturf. Fr. Berlin 3: 449. 

 1801. 



Floerlea occidentalis Rydherg, Mem. N. Y. Bot. Gard. 1: 208. 1900. 



Type locality: "In Pennsylvanien." 



Range: Washington to Ontario southward to California, Utah, and Pennsylvania. 



Specimens examined: Ellensburg, Piper, May 21, 1897; Klickitat River, Flett 1018; 

 without locality, Wilkes Expedition. 



Zonal distribution: Transition. 



ANACARDIACEAE. Cashew Family. 



RHUS. 



Fruit red, pubescent; leaflets 11 to 31 1. R. glabra. 



Fruit white, glabrous; leaflets 3. 



Leaflets mostly subentire, the lateral ones pctioled 2. R. toxicodendron. 



Leaflets mostly crenate, the lateral ones sessile Z. R. diversiloba. 



1. Rhus glabra occidentaKs Torr. Bot. Wilkes Exped. 257. 1874. Sumac. 



Rlnis occidentalis Blankinship, Mont. Agr. Coll. Sci. Stud. 1 : 86. 1905. 



Type locality: "Banks of rivers, near Fort Okanagan and Fort Vancouver; also on 

 the Kooskooskee." 



Range: British Columbia to Montana and Oregon. 



Specimens examined: Near Wenache, Whited 56; Columbus, Sulcsdorf 2454; Morgam 

 Ferry, Sulcsdorf 265; Columbia River, Lyall in 1860; Rock Island, Sandberg cfe Leiberg 42£; 

 Almota, Lake & Hull 448; Wawawai, Lake <& Hull 448; Elmer 872; Piper 1654; Waitsburg, 



