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. Porson Ivy. 
Rhus rydbergii Small, Mem. N. Y. Bot. Gard. 1: 268. 1900. 
Type Loca.iry: “Habitat in Virginia, Canada.” 
Ranae: British Columbia to Nova Scotia, southward to Arizona and Florida. 
SPECIMENS EXAMINED: Wenache, Wihited 241; Yakima, Leckenby, June, 1898; west 
Klickitat County, Suksdorf 263; Spokane, Henderson, July, 1892; Hangman Creek, Suksdor/ 
264; Wawawai, Lake 447; Spokane, Kreager 538; without locality, Vasey in 1889. 
ZONAL DISTRIBUTION: Upper Sonoran. 
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 2. rydbergii Small as well founded, but 
proposes three additional new species for Washington plants under the generic name 
Toxicodendron,a namely, 7. hesperium, founded on Whited’s 241, 7. lobadioides, and T. 
coriaceum, the two latter founded on specimens collected by Suksdorf. 
3. Rhus diversiloba Torr: & Gr. Fl. 1: 218. 1838. Poison OAK. 
Rhus lobata Hook. Fl. Bor. Am. 1: 127. 1880, not Poir. 1804. 
Type Locauiry: “Oregon.’’ Collected by Douglas. 
Ranae: 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. 
“Ruus aromatica Ait. var.” Suksdorf thus lists a species of the occurrence of which 
in Washington there is no direct evidence. Rhus trilobata occurs in southern Oregon, but 
probably does not reach Washington. 
CELASTRACEAE. Srarrrree Fairy. 
Stamens 4 or 5, as many as the petals and sepals. 
Deciduous shrub; flowers 5-merous ........ 22.22... -.------------- EKuonyMus. 
Evergreen shrub; flowers 4-merous..__........--.---------------- PACHISTIMA. 
Stamens 10; flowers 5-merous....-..-.-. 2-2-2. 22 2 ee ee ee ee FORSELLESIA, 
EUONYMUS. 
1. Euonymus occidentalis Nutt.; Torr. Pac. R. Rep. 4: 74. 1856. 
Type Locatiry: “Oregon in dark woods.”” Collected by Nuttall. 
Rance: Washington to California and Nevada. 
SPECIMENS EXAMINED: Seven miles east of Vancouver, Gorman in 1905. 
PACHISTIMA. 
1. Pachistima myrsinites (Pursh) Raf. Fl. Tellur. 42. 1838. 
Hlex? myrsinites Pursh, Fl. 1: 119. 1814. 
Myginda myrtifolia Nutt. Gen. 1:109. 1818. 
Oreophila myrtifolia Nutt.; Torr. & Gr. Fl. 1:259. 1838. 
Type Locauity: “On the Rocky Mountains and near the Pacific Ocean.” Collected 
by Lewis. The exact spot in the Rocky Mountains is on the Lolo Trail near Hungry [Lolo] 
Creek, North Idaho. 
aGreene, Leaflets 1: 118-120. 1605. 
