PIPER FLORA OF THE STATE OF WASHINGTON. 383 



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

 Callitriche autumndlis L. FI. Suec. ed. 2. 2. 1755. 

 Type locality: "Habitat in Europao fossis paludibus." 



Eange: British Columbia to Oregon, Colorado, and Canada. Euiopc. 

 Specimens examined: Lake Cushman, Henderson 1862; iiunifli of the Coliunl>ia, 

 Scolder. 



2. Callitriche verna L. Fl. Succ. cd. 2. 2. 1755. 

 Type locality: P]uropean. 



Range: Temperate regions of Anu-rifa, P]urop(\ and Asia. 



Specimens examined: Iloquiam, Lamb 1012; Nortli Yakima, I'ljur 1797; Mount 

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



3. Callitriche bolanderi llegelm. Verli. Hot. Verein Prnndeiil). 10: 116. ixns. 

 Type locality: Auburn, California. 



Range: Vaneou^'er Island to California. 



Specimens examined: Clallam County, Elmer 2779; Lake Cushman, Piper 223(5; 

 Seattle, Piper, July 12, 1895; Usk, Krem/er 352; Taeoma, Flett 2262. 



EMPETRACEAE. ('iiowiuokry Family. 



EMPETRUM. 



1. Enipetrum. nigi-um L. Sp. PI. 2: 1022. 1753. Crowbehuy. 



Type locality: P]uropean. 



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

 Specimens examined: Moanl Rainier, Piper 2051; Smith 1100; Copalis, Comird 409. 



LIMNANTHACEAE. liK kbkax Family. 



FLOERKEA. 



1. Floerkea proserpinacoides AVilld. .Xcuc Schiifl. (ics. Nalurf. Fr. Berlin 3:419. 

 1801. 



Fherl-ea occidenialis Rydberg, Mem. X. Y. Bot. Card. 1: 2C:8. 1900. 



Type locality: "In Pennsylvanien." 



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



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

 without localitj', Willces Expedition. 



Zonal distribution: Transition. 



ANACARDIACEAE. (Avsiikw Family. 



RHUS. 



Fruit red, pubescent; leaflets 11 to 31 1 . li. i/lahra. 



Fruit white, glabrous; leaflets 3. 



Leaflets mostly subentire, the lateral ones petioled _ 2. R. toxicodendron. 



Leaflets mostly crenate, the lateral ones sessile 3. /?. direrKiloha. 



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



Rhus occidentalis Blankinshijj, Mont. Agr. Coll. Sci. Stud. 1: 86. 1905. 



Type locality': "Banks of riveis, near Fort Okanagan and F(H-t A'aiicouver; also tm 

 the Kooskooskee." 



Range: British Columbia to Montana and Oregon. 



Specimens examined: Near Wenache, Whited 56; C'olumbus, SuJcsdorf 2454; Morgan^. 

 Ferry, Suhsdorf 265; Columbia River, Lj/all in 1860; Rock Island, Sandherg d- Leiberg 429; 

 Almota, Lake d' Hull 448; Wawawai, Lake d Hull 448; Elmer 872; Piper 1654; Waitsburg, 



