384 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Homer 393; without locality, Vasey 213; Clarks Springs, Kreager 121; Spokane, Kreager 

 552; Prosscr, Cotton 622; Kiona, Cotton 729. 

 Zonal distribution: Upper Sonoran. 



2. Bhus toxicodendron L. Sp. PI. 1: 266. 17.53. Poison ivy. 

 Rhm rydhen/n Small, Mem. N. Y. Bot. (nird. 1 : 268. 1900. 



Ttpe locautv: "Habitat in Virginia, Caiiada." 



Range: British Columbia to Nova Scotia, southward to Arizona and Florida. 



Speci-MEns examined: Wenache, WItited 241; Yakima, Ijfckenby, Juno, 1898; west 

 Klickitat County, Suksdorf2G3; Spokane, Henderson, July, 1892; Hangman Creek, Saksdorf 

 2(>4; Wawawai, Lake 447; Spokane, Kreayer 538; without locality, Vasey in 1889. 



Zonal distribittion: Upper Sonoran. 



The western plant seems never to climb trees or walls, but is a low, erect, or decumbent 

 slirub. Without better distinctions than this we see no reason for considering it a distinct 

 spec'ies, a.s ha.s been done by Small. 



Professor Greene, however, not only considers R. rydberyii Small n.s well founded, but 

 proposes three additional new species for Washington plants under the generic name 

 Toxicodendron," namely, T. hesperiutu, founded on Whited's 241 T. lohadioides, and T. 

 coriaceum, the two latter founded on s|M>cimens collected by Suksdorf. 



3. Bhua diversiloba Torr. & Gr. Fl. 1 : 218. 18.38. Poison oak. 

 Rhus lohaia Hook. Fl. Bor. Am. 1: 127. 1830, not Poir. 1804. 



Type ixx^ALnr: "Oregon." Collected by Douglas. 



Range: Washington to California in the coast regions. 



Specimens examined: Orchard Point, Piper, July, 1895; Seattle, Pi]>er in 1887; Union 

 City, Piper in 1900; Tacoma, Flett 141. 



Zonal distribution: Humid Transition. 



"Rhus abomatica Ait. var." Suksdorf thus lists a species of the occurrence of which 

 in Wa.shington there is no direct evidence. Rhus trilobata occurs in south(!rn Oregon, but 

 probably does not reach Washington. 



CELASTRACEAE. Stakktkkk Family. 



Stamens 4 or 5, as many as the petals and sepals. 



Deciduous shrub; flowers .>-merous EuoNYMUS. 



Evergreen shrub; flowers 4-mcrous Paciiistima. 



Stamens 10; flowers 5-merous Forsellesia. 



EUONYMUS. 



1. Euonymus occidentalis Nutt.; Torr. Pac. R. Rep. 4: 74. 1856. 

 Type lcx^ality: "Oregon in dark woods." Collected l)y Nuttall. 

 Range: Wa.shington to California and Nevada. 

 Specimens examined: Seven miles east of Vancouver, Gorman in 1905. 



PACHISTIMA. 



1. Pachistima myrsioites (Pursh) Raf. Fl. Tellur. 42. 1838. 



Ilex'i myrsinites Pursh, Fl. 1: 119. 1814. 



Myginda myrtifolia Nutt. Gen. 1 : 109. 1818. "^ 



Oreophila myrtifolia Nutt.; Torr. & Gr. Fl. 1 :259. 1838. 



Type locality: "On the Rocky Moimtains and near the Pacific Ocean " Collected 

 by Lewis. The exact spot in the Rocky Mountains is on the Lolo Trail near Hungry [IjoIo] 

 Creek, North Idaho. 



a Greene, Leaflets 1: 118-120. 1905. 



