PIPER FLORA OF THE STATE OF WASHINGTON. 447 



The illustration in the Flora de Serres seems to be exactlj- the plant common in the Bitter- 

 root Mountains, of Idaho, so far as one may judge from the flowering plant alone. The 

 Cascade Mountains plant {D. viviparum) difl'ers only in having the leaves obscurely crenate 

 instead of entire or denticulate. The capsule characters are the same in both 



DOXJGLASIA. 



Leaves canescent with forked hairs I. D. dentata. 



Leaves glabrous or nearly so 2. Z). laevigata- 



1. Douglasia dentata S. Wats. Proc. Am. Acad. 17: 37.5. 1882. 

 DowjUisla niralis dentata A. Gray, Syn. Fl. ed. 2. 2 ': 399. 1886. 



Amlrosace dieckiana Haussk. Mitt, des Bot. Ver. fiir gesammt-Thuringen 1890 : 22. 1890. 



Type locality: "On a dry ridge above Peshastin Canon,"' Washington. Collected by 

 Watson. 



Range: In the Wenache region, Washington. 



Specimens examined: Mount Stuart, Elmer 1230; Sandberg d' Leiberg 545; Wenache 

 Mountains, Whited in 1896; Wenache Region, Brandegee 952; Yakima Region, Brandegee; 

 Peshastin Canyon, Vt'atson 264; Kittitas County, Henderson 2365; Clealum, Henderson in 

 1892; without locality, T'asc)/ in 1889. 



2. Douglasia laevigata A. Gray, Proc. Am. Acad. 16: 105. 1880. 

 Type locality: Mount Hood, Oregon. Collected by Howell. 

 Range: Washington and Oregon. 



Specimens examined: Olympic Mountains, Piper, August, 1895: Flett 804; Henderson 

 July, 1890, 2366; J. M. Grant in 1889: Elmer 2801; Goat Mountains, Allen 187. 

 Zonal distribi'tion: Hudsonian. 



Docglasia nivalis Lindl., listed by Suksdorf, is not known west of the Rocky Mountains. 



GLAUX. 



1. Glaux maritima L. Sp. PI. 1: 207. 1753. 



Type locality: Europe. 



Range: Sea coasts, California to Alaska and ^ew England to Greenland. Europe. 

 Asia. 



Specimens examined: Westport, Henderson, June 25, 1892; Whidby Island, Gardner 

 199; Seattle, Piper; Whatcom County, Suhsdorf 989; without locality, Cooper. 



The last three specimens are referable to G. marih'ma obtusifolia Fernald,a differing from 

 the species in its more erect habit, simple or sparingly branched stems, and broader leaves. 



Zonal distribution: Humid Transition. 



CENTUNCULUS. 



1. Centunculus minimus L. Sp. PI. 1: 116. 1753. 



Type locality: "Habitat in Italiae, Galliac, Scaniae arenosis." 



Range: Washington to Illinois, south to Florida and Texas. South America. Europe. 



Speclmens examined: Falcon Valley, Sul'sdoif, June, 1880: Spokane, Piper 2765; 

 Silver Lake, Henderson, July 13, 1892; Lake Kalispel, Kreager 322. 



Zonal distribution: Arid Transition. 



TRIENTALIS. Star flower. 



Leaves crowded near the summit of the stem \. T. latifoha. 



Leaves scattered along the stem ; bog plant 2. T. arctica. 



1. Trientalis latifolia Hook. Fl. Bor. Am. 2: 121. 1838. 

 Trientalis europaea latifoUa Torr. Proc. Am. Acad. 4: 118. 1860. 



aRhodora4: 215. 1902. 



