PIPER FLORA OF THE STATE OF WASniNGTON . 211 



IBIDIUM. 



I'ip niiu'h dilated at the apex, the basal swellings small ] . /. romanzoffianuin. 



Lip little dilated at the apex, the basal swellings large 2. 7. poirifolium. 



1. Ibidium romanzofiianum (Cham.) House, Muhlenbeigia 1: 129. 1906. 

 Spiinnthes rotnamojfiana Cham. Linnaea 3: 32. 1828. 



Gyrostachys romanzoffiana MacM. Met. Minn. 171. 1892. 



Gyrosiachys siricfa Rydberg, Mem. N. Y. Bot. Gard. 1: 107. 1900. 



Type locality: "Unalaschka." 



Range: Alaska to Newfoundland, south to California, Colorado, and New York. 



Specimens examined: Whidby Island, Gardner 272; Cascade Mountains 49°, Lyall in 

 1859: Mount Adams, Henderson, August, 1892; Haven's ranch, Henderson, August, 1892; 

 Tacoma, Flett 125; Fort Vancouver, Tolinie; Stevens Pass, Whited 1439; without locality, 

 Vasey in 1889; Blue Mountains, Horner 471; Kalispel Lake, Kreager 337; without locality. 

 Cooper; Seattle, Piper in 1885; Mount Rainier, Piper, August, 1888. 



Zonal distribution: Transition. 



This species was referred to Spiranthes cemiio in Hooker's Flora and in Cooper's Report. 

 Subalpinc forms of it from sphagnums bogs are much smaller and with short s^jikes. 



2. Ibidium porrifolium (Lindl.) Rydberg, Bull. Torr. Club 32: C.IO. 1905. 

 Spiranthes porrifol.ia Lindl. Gen. & Sp. Orcli. 407. 1840. 



Gyrostachys poirifolia Kuntze, Rev. Gen. PI. 2: G64. 1891. 



Type locality: "In Louisiana." 



Range: Washington to California. 



Specimens examined: Falcon Valley, ^'f/A.sy/w/, September 3, 1881. 



EPIPACTIS. 



1. Epipactis gigantea Dough; Hook. Fl. Bor. Aul 2: 202. /. .m?. 1839. 



Type LocALrr^ : "N. W. America. On the sulialpine legions of the Blue and Rocky 

 Mountains. Douglas. Columbia River, about Fort Vancouver. Dr. Scolder." 



Range: Washington to California and Texas. 



Specimens examined: Clallam County, Elmer 2550; Rock Island, Sandberg d- Leiherg 

 453; near Priest Rapids, Brandegee 1091; Spokane County, Svksdotf 240; Seattle, Tar- 

 leton; Lake Crescent, Lawrence 301. 



Zonal distribution: Upper Sonoran and Transition. 



SALICACEAE. Willow Family. 



Stamens 1 to 5 in ours; bracts entire Salix (p. 211) 



Stamens numerous; bracts fimbriate Populus (p. 217). 



SALIX. Willow. 



Trees with furrowed bark; stamens 5 or more, aments on short leafy 

 branchlets. 



Petioles slender, giandless; leaves broadly lanceolate ^ . \. S. amygdaloides. 



Petioles short, bearing glands; leaves narrowly lanceolate. 



Leaves pale beneath, attenuate from the middle. 2. S. lasiandra. 



Leaves green beneath, long, attenuate nearly from tiie base . 2a. 5. caudata. 

 Shrubs, rarely trees, with smooth or at lea.st not furrowed hark; sta- 

 mens 2 or 1. 



Stamen 1; aments appearing before the leaves: leaves \ery silky 



beneath, entire 21. »S'. sitchensis. 



Stamens 2. 



Scales of the aments pale; leaves narrow, appearing before 

 the aments. 



