PIPER—FLORA OF THE STATE OF WASHINGTON. 383 
1. Callitriche palustris L. Sp. Pl. 2: 969. 1753. 
Callitriche autumnalis L. Fl. Suec. ed. 2. 2. 1755. 
Tyre Locauitry: “Habitat in Europae fossis paludibus.”’ 
Rance: British Columbia to Oregon, Colorado, and Canada. Europe. 
SPECIMENS EXAMINED: Lake Cushman, Henderson 1862; mouth of the Columbia, 
Scouler. 
2. Callitriche verna L. I*]. Suec. ed. 2. 2. 1755. 
Type Locauity: European. 
Rance: 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. Verh. Bot. Verein Brandenb. 10: 116. 1868. 
Type Locauity: Auburn, California. 
Rance: 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. Crowperry FAMILY. 
EMPETRUM. 
1. Empetrum nigrum L. Sp. Pl. 2: 1022. 1753. CrowBERRY. 
TYPE LocaLity: European. 
RanaeE: Arctic regions southward to Maine, Michigan, and Washington. Europe. Asia 
SPECIMENS EXAMINED: Mount Rainier, Piper 2051; Smith 1100; Copalis, Conard 409. 
LIMNANTHACEAE. BucKeean Faminy. 
FLOERKEA. 
1. Floerkea proserpinacoides Willd. Neue Schrift. Ges. Naturf. Fr. Berlin 3: 449. 
1801. 
Floerkea occidentalis Rydberg, Mem. N. Y. Bot. Gard. 1: 268. 1900. 
Type Locariry: “In Pennsylvanien.”’ 
Ranee: 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. Casuew Famity. 
RHUS. 
Fruit red, pubescent; leaflets 11 to 31.......2..2....2.2.----.----- 1. R. glabra. 
Fruit white, glabrous; leaflets 3. 
Leaflets mostly subentire, the lateral ones petioled....--..--..- 2. R. toricodendron. 
Leaflets mostly crenate, the lateral ones sessile... ....---.----- 3. R. diversiloba. 
1. Rhus glabra occidentalis Torr. Bot. Wilkes Exped. 257. 1874. SuMAC. 
Rhus occidentalis Blankinship, Mont. Agr. Coll. Sci. Stud. 1: 86. 1905. 
Type Locauity: “Banks of rivers, near Fort Okanagan and Fort Vancouver; also on 
the Kooskooskee.” 
Rance: British Columbia to Montana and Oregon. 
SPECIMENS EXAMINED: Near Wenache, Whited 56; Columbus, Suksdorf 2454; Morgans 
Ferry, Suksdorf 265; Columbia River, Lyall in 1860; Rock Island, Sandberg & Leiberg 429; 
Almota, Lake & Hull 448; Wawawai, Lake & Hull 448; Elmer 872; Piper 1654; Waitsburg, 
