PIPER—FLORA OF THE STATE OF WASHINGTON. 2?1 
UVLMACEAE. [Eum Famitry. 
CELTIS. 
1. Celtis douglasii Planch. Ann. Sci. Nat. II. 10: 293. 1848. HACKBERRY. 
Tyee Locatity: “In aridis scopulosis regionem interiorum, secus flumen Columbia.’”’ 
Collected by Douglas. 
Rance: Washington, Oregon, and Idaho. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 39; Snake River region, Bran- 
degee 1073; Almota, Piper, May 2, 1897; Wawawai, Elmer 1016; Piper 1511 and October, 
1893. 
ZONAL DISTRIBUTION: Upper Sonoran. 
Our tree has been referred to both C. occidentalis L. and C. reticulata Torr. It is perhaps 
only a geographical race of the former. Ordinarily it is a very scraggly tree, with very 
scabrous leaves, commonly distorted by insect work. In irrigated land, however, it is a 
graceful and attractive tree, the leaves becoming thinner, darker green, and much less 
rough. 
The Wilkes Expedition specimens are said to have been collected at Port Discovery, 
but this is probably an error. 
URTICACEAE. Nerrie FAMILY. 
Leaves opposite, possessing stinging hairs..........-.-..--..------------ Urtica. 
Leaves alternate; no stinging hairs................2-22-.-.22-2--------- PARIETARIA. 
URTICA. NeErt ie. 
Leaves soft-pubescent on both sides. . 2.22.22... 22-2222. -222------- 1. U. holosericea. 
Leaves glabrous above, sparsely pubescent beneath... ......-.------ - 2. U. lyallii. 
1. Urtica holosericea Nutt. Journ. Acad. Phila. If. 1: 183. 1847. 
Type Locauity: ‘Near Monterey, Upper California.” 
Rance: Washington and Idaho to California. 
SPECIMENS EXAMINED: Yakima County, //enderson 2498; west Klickitat County, Suks- 
dorf 1381; Marshall Junction, Piper, July 2, 1896; Almota, Piper, September 9, 1896; 
Union Flat, Piper 3045; Wawawai, Piper 1509. 
ZONAL DISTRIBUTION: Upper Sonoran and Arid Transition. 
2. Urtica lyallii. S. Wats. Proc. Am. Acad. 10: 348. 1875. 
TyprE Locariry: “In the Cascade Mts. in lat. 49°.”? Collected by Dr. Lyall. 
Rance: British Columbia to Idaho and California. 
SPECIMENS EXAMINED: Montesano, Heller 3920; Clallam County, Elmer 2760; Seattle, 
Piper 2316; Cascade Mountains, 49°, Lyall; Ellensburg, Brandegee 1075; Klickitat 
County, Suksdorf 58; Horseshoe Basin, Elmer 709; Wilson Creek, Lake & Hull 654; Spo- 
kane, Piper, July 2, 1896; Blue Mountains, Lake 654; Piper, July 17, 1896; Union Flat, 
Piper 3046; Pullman, Piper 3046, 1510; Clarks Springs, Kreager 42. 
ZONAL DISTRIBUTION: Transition. 
Washington specimens referred to Ul’. gracilis Ait. belong here, as does the specimen 
listed by Suksdorf as ‘‘U". breweri(‘).’’ Specimens from the immediate seacoast tend to 
have thicker, more deeply cordate leaves, but this character is apparently due to mari- 
time influences and is not sufficient to distinguish the plant. 
PARIETARIA. 
\ 
1. Parietaria pennsylvanica Muhl.; Willd. Sp. Pl. 4?: 955. 1805. 
Tyree Locauitry: ‘“ Habitat in Pennsylvania.” 
Rance: British Columbia to Canada, southward to Florida and Mexico. 
