I 



PIPER — -FLORA OF THE STATE OF WASHINGTON. 221 



UIMACEAE. Elm Family. 



CELTIS. 



1. Celtis douglasii Planch. Ann. Sci. Nat. III. 10: 293. 1848. Hackberry. 



Type locality: "In aridis scopulosis regionem interiorum, secus flumen Columbia." 

 Collected by Douglas. 



Range: 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 lapd, 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. Nettle Family. 



Leaves opposite, possessing stinging hairs Uetica. 



Leaves alternate; no stinging hairs Paeietaria. 



TJUTICA. Nettle. 



Leaves soft-pubescent on both sides 1. U, holosericea. 



Leaves glabrous above, sparsely pubescent beneath 2. U. lyaUii. 



1. TJrtica holosericea Nutt. Journ. Acad. Phila. II. 1: 183. 1847. 

 Type locality: "Near Monterey, Upper California." 



Range: Washington and Idaho to California. 



Specimens examined: Yakima County, Henderson 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. 



Type locality: "In the Cascade Mts. in lat. 49°." Collected by Dr. Lyall. 



Range : 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 cfe 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 U . gracilis Ait. l^elong here, as does the specimen 

 listed by Suksdorf as "U. breweri{'i)." 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 peimsylvanica Muhl.; Willd. Sp. PI. 4^: 955. 1805. 

 Type locality: "Habitat in Pennsylvania." 

 Range: British Columbia to Canada, southward to Florida and Mexico. 



