382 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



2a. Euphorbia serpyllifolia cousanguinea Boiss. in DC. Prod. 16'-: 43. 1862. 



Type locality: Ad lacum Winnipeg (Bourgeau), in valle Missouri superioris (Neuwied), 

 territ. Nebraska (Hayden), Novo Mexico (Wright, Fendler), Kansas et Texas (ex Engelm.) 

 California (Engelm.). 



Range: Washington to Saskatchewan, Texas, and California. 



Specimens examined: West Klickitat County, SuArsdor/" 210. 



3. Euphorbia maculata L. Sp. PI. 1 : 455. 175;^. 

 Type locality': "Habitat in America septentrionali." 

 Range: Most of temperate North America. 



Specimens examined: Meyers Falls, Kreager, August 25, 1902. 



4. Euphorbia peplua L. Sp. PI. 1 : 456. 1753. 

 Type ixx;ality: European. 



Speclmens examined: East Seattle, Hindshaw, June, 1897. 



5. Euphorbia cyparissias L. Sp. PI. 1: 461. 1753. 



Type locality: "Habitat in Misnia, Bohemia, Helvetia, G. Narbonensi." 

 Specimens examined: Pullman, Piper, June, 1897. 



6. Euphorbia arkansana missourieiisiB Norton, Rop. Mo. Bot. Gard. 1 1 : 103. 1900. 

 Type ix)Cality: Randolph, Missouri. 



Range: Washington to Minnesota, Kan.sa.s, and New Mexico. 



Specimens examined: Walla Walla Region, lirandegee 1072; Almota, Lake <& Hull 641; 

 Wawawai, Elmer 758. 

 Zonal distribution: Upper Sonoran. 



Euphorbia platyphylla L. This European species wjis rejwrted by Hooker" from the 

 " plains of the Columbia River," collected by Douglas, but there is no recent evidence of 

 such occurrenc*. 



PISCARIA. 



1. Piscaria setigera (Hook.) 

 r Eremocarpus setigerus Benth. Bot. Sulph. 53. pi. 26. 1844. 



§ Crotonf setigerus Hook. Fl. Bor. Am. 2: 141. 1838. 



Type locality: "Plentiful on Menzies' Island, and on sandy banks of the Columbia 

 upwards." Collected by Douglas. 



Range: Washington to California. 



Specimens examined: Bingen, Piper, September, 1903; Granddalles, Westgate 927. 



Zonal distribution: Arid Transition. 



As pointed out by Coville, b Eremocarpus was first used for a genus of Hypericaceae by 

 Reichenbach in 1837, and is therefore not available for our plant. The new name is given 

 in allusion to the use of the plant by the Indians to stupefy fish by throwing quantities of 

 it in the streams. It is rather strange that the plant should first have been found at the 

 extreme northern point of its range. 



CALLITRICHACEAE. Water Starwort Family. 



CALLITRICHE. 



Leaves all submersed, linear, 1-nerved 1. C. jxtlustris. 



Floating leaves obovate-spatulate, 3-nerved. 



Styles about as long as the fruit 2. C. verna. 



Styles twice as long as the fruit 3. C. bolanderi. 



a Fl. Bor. Am. 2: 140. 1838. b Contr. IJJat. Herb. 4: 194. 1893. 



