PIPER FLORA OF THE STATE OF WASHINGTON. 217 



Salix cinerea L. Sp. PI. 2: 1021. 1753. Anderson a refers thus, but doubtfully, a 

 specimen collected by Geyer (no. 636) in "thickets along rivulets, Columbia River Valley 

 near Fort Colville," said to be " 15-20 feet high, shrubby." Hooker b calls the same 

 specimen S. grisea? We have not seen the specimen, but suspect it to be a form of S. 

 bebbiana. 



Salix longifolia Muhl. does not occur in our limits, all such references pertaining to 

 closely related species. 



POPULUS. 



Bark smooth; petioles flattened; capsules oblong-conic, smooth . . LP. tremvJoides. 



Bark rough; petioles terete; capsule globose, hairy 2. P. trichocarpa. 



1. Populus tremuloides Michx. Fl. 2: 243. 1803. Aspen. 

 Type locality: "Hab. in Canada et Noveboraco." 



Range: Alaska to Labrador, southward to Pennsylvania, Missouri, New Mexico, and 

 California. 



Specimens examined: Egbert Springs, Sandberg tfc Leiberg 391; Darling Mountains, 

 FleU 1350; Pullman, Piper; Wenas, Griffiths & Cotton 104. 



Zonal distribution: Transition. 



Two apparently distinct aspens occur in eastern Washington and we suspect that neither 

 is good P. tremvloides. The herbarium material is, however, very imperfect and the settle- 

 ment of the problem must await more field study and better collections. 



2. Populus trichocarpa Torr. & Gray; Hook. Icon. 0: t. 878. 1852. Cottonwood. 

 Populus balsamifera y Hook. Fl. Bor. Am. 2: 154. 1839. 



Type locality: Santa Clara River near Buenaventura, California. Collected by Parry. 



Range: British Columbia to Montana and California. 



Specimens examined: Egbert Springs, Sandberg cfc Leiberg 394; Atanum River, FleU 

 1343; Wenache Mountains, Whited 1343; Spokane, Piper, July 26, 1896; Colfax, Piper, 

 August 2, 1896; Almota, Piper 1791; Wenas, Griffiths & Cotton 69. 



Zonal distribution: Transition and Upper Sonoran. 



In Cooper's report this tree was referred to Populus angusti/olia James, a species that is 

 not known in Washington. 



Populus balsamifera Ait. has several times been ascribed to Washington, but there 

 are no specimens to substantiate the ascription, all thus referred so far as seen being 

 P. trichocarpa. 



MYRICACEAE. Sweet Gale Family. 



MYRICA. 



Leaves evergreen, 5 to 10 cm. long; tree 3 to 6 meters high 2. M. californica. 



Leaves deciduous, 2 to 5 cm. long; shrub about 1 meter high L M. gale. 



1. Myrica gale L. Sp. PI. 2: 1024. 1753. Sweet gale. 

 Type locality: Europe. 



Range: Alaska to Newfoundland, southward to Washington, Michigan, and New York. 

 Asia. Europe. 



Specimens examined: Weiser hake, Sulcsdorf 1003; Ilwaco, Henderson 2164; Seattle, 

 Piper in 1887. 



Zonal distribution: Humid Transition and Canadian. 



2. Myrica californica Cham. Linnaea 6: 535. 1831. 

 Type locality: "Ad portum sancti Francisci Californiae." 

 Range: Seacoasts, Washington to California. 



aProc. Am. Acad. 4: 60. 1858. &Kew Gard. Misc. 7: 372. 1855. 



