130 LICHENS OF THE STATE OF WASHINGTON 



On trees, dead branches, and decaying wood : King Co. : Edgewood, 

 300 ft., 1940, 3089. Kittitas Co. : Easton, 2168 ft., 1931, 846. Whitman Co. : 

 Tekoa Mts., 2900 ft., 1931, 1604. Plate V, C. 



6. Parmelia vittata (Ach.) Rohl. Deutschl. Fl. 3, Abt. 2:109. 1813. 

 P. physodes var. vittata Ach. Meth. Lich. 250. 1803. 



Thallus grayish olive (R), ivory yellow (R), or pale ohve-gray (R), 

 dichotomously divided into long narrow, often quite delicate, slightly in- 

 flated lobes, tips rather sharp pointed, often divaricately branched, black 

 margin, conspicuous; below reddish brown to black, often brown at the 

 tips, wrinkled, shiny, rhizoids absent. Apothecia very similar to those of 

 P. enteromorpha in both external and internal structure, the disk is usually 

 not so wide. 



On trees, dead branches, decaying wood : Pacific Co. : Long Beach, 

 1928, 1909. Kitsap Co. : Hidden Ranch, near Bremerton, 213 ft., 1928, 523. 

 San Juan Co. : Orcas Island, Mt. Constitution, 2500 ft., 1928, 2044. Pierce 

 Co. : White River Camp, 3900 ft., 1940, 3097. Whatcom Co. : Mt. Baker, 

 Galena, 3800 ft., 1931, 1180. Chelan Co.: Stehekin, 1140 ft., 1931, 1289. 

 Spokane Co. : Mt. Spokane, 5808 ft., 1931, 1489. Grays Harbor Co. : West- 

 port, 1919, /. M. Grant (F) ; Montesano, 1919, /. M. Grant 3011 (F). 

 KHckitat Co. : Goldendale, 1909, Foster 1162 (F). Plate V, B. 



A common species, widely distributed, distinguished by the long, 

 slender, black bordered lobes, with forked tips. 



7. Parmelia pertusa (Schrank) Schaer. Lich. Helvet. Spicil. sect. 10, 457. 



1840. 



Lichen pertusus Schrank, Baierisch. Flora 2:519. 1789. 



Thallus light grayish-olive or ivory yellow, orbicular, medium sized, 

 closely adnate, slightly inflated, divided palmately into many sinuate lobes, 

 tips rounded, perforated with small rounded holes and beset with con- 

 spicuous, raised, round masses of soredia ; below black, sometimes brown 

 on tips of lobes, wrinkled, rhizoids absent. "Apothecia very rare except in 

 austral regions, smallish, chestnut, with an entire margin. Spores in twos 

 and fours, ellipsoid, 45-60 x 22-28 /x." From Tuck. Syn. N. Am. Lich. 61. 

 1882. 



On trees or rock: Pacific Co.: Loomis Lake, 1931, 733; Chinook, 1940, 

 2833. Wahkiakum Co. : Cathlamet, 1940, 2921. Grays Harbor Co. : Aber- 

 deen, 1908, Foster 916 (W) ; Montesano, 1919, /. M. Grant 3030 (F). 

 Thurston Co. : Gate, 1911, Foster 1936 (W). Wahkiakum Co. : Cathlamet, 

 1907, Foster 467 (W). 



Rather a rare species, collected only in the Pacific Coastal Plain, 

 Olympic Mountains, and Puget Sound Basin. The small holes perforating 

 the thallus are a very good distinguishing character. I have seen no fruiting 

 material from the state. 



