384 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



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

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

 Zonal distribution: Upper Sonoran. 



2. Rhus toxicodendron L. Sp. PL 1 : 266. 1753. Poison ivy. 

 Rhus rydhergii Small, Mem. N. Y. Bot. Gard. 1 : 268. 1900. 



Type locality: "Habitat in Virginia, Canada." 



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



Specimens examined: Wenache, Wkited 241; Yakima, Leckenhg, June, 1898; west 

 Klickitat County, Suksdo7f2(iS; Spokane, Henderson, July, 1892; Hangman Creek, Suksdorf 

 204; Wawawai, LaJce 447; Spokane, Kreager 538; without locality, Vasey in 1889. 



Zonal distribution: Upper Sonoian. 



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

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

 species, as has been done by Small. 



Professor Greene, however, not only considers R. rydhergii Small as well founded, but 

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

 Toxicodendron,o namely, T. Jiesperium, founded on Whited's 241. T. lobadioides, and T. 

 cortMceurn, the two latter founded on specimens collected by Suksdorf. 



3. Rlius diversiloba Torr. & Gr. Fl. 1 : 218. 1838. Poison oak. 

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



Type locality: "Oregon." Collected by Douglas. 



Range: Washington to California in the coast regions. 



Specimens examined: Orchard Point, Piper, July, 1895; Seattle, Piper in 1887; Union 

 City, Piper in 1900; Tacoma, Flett 141. 



Zonal distribution: Humid Transition. 



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

 in Washington there is no direct evidence. Rhus trilohnta occurs in southern Oregon, but 

 probably does not reach Washington. 



CELASTRACEAE. Stafftree Family. 



Stamens 4 or 5, as man}' as the petals and sepals. 



Deciduous shrub ; flowers 5-merous Euonymus. 



Evergreen shrub; flowers 4-meroua . Pachistima. 



Stamens 10; flowers .5-merous Forsellesia. 



EUONYMUS. 



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

 Type locality: "Oregtm in dark woods." Collected by Nuttall. 

 Range: Washington to California and Nevada. 

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



PACHISTIMA. 



1. Pachistima myrsinites (Pursli) Raf. Fl. Tellar. 42. 1838. 



Ilex'i myrsinites Pursh, F\. 1: 119. 1814. 

 - Myginda myrtif alia l<iutt. Gen. 1:109. 1818. 



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



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

 by Lewis. The exact spot in the Rocky Mountains is on tlic Lolo Trail nca;- Uungry [Lolo] 

 Creek, North Idaho. 



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



