PIPER FLORA OF THE STATE OF WASHINGTON. 211 



IBIDIUM. 



Lip much dilated at the apex, the basal swellings small 1.7. romanzoffianum. 



Lip little dilated at the apex, the basal swellings large 2. /. porrifolium. 



1. Ibidium romanzoflB-anum (Cham.) House, Muhlenbergia 1: 129. 1906. 

 Spiranthes romanzoffiana Cham. Linnaea 3: 32. 1828. 



Oyrostachys romanzoffiana MacM. Met. Minn. 171. 1892. 



Gyrostachys strida Rydberg, Mem. N. Y. Bot. Gard. 1: 107. 1900. 



Type locality: " Unalaschka." 



Eange: 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, Tolmie; 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 cemua in Hooker's Flora and in Cooper's Report. 

 Subalpine forms of it from sphagnums bogs are much smaller and with short spikes. 



2. Ibidium porrifolium (Lindl.) Rydberg, Bull. Torr. Club 32: 610. 1905. 

 Spiranthes porrifolia Lindl. Gen. & Sp. Orch. 467. 1840. 



Gyrostachys porrifolia Kuntze, Rev. Gen. PI. 2: 664. 1891. " 



Type locality : " In Louisiana." 



Range: Washington to California. 



Specimens examined: Falcon Valley, /SM^sdor/, September 3, 1881. 



EPIPACTIS. 



1. Epipactis gigantea Dough; Hook. Fl. Bor. Am. 2: 202. t. 202. 1839. 



Type locality: "N.W. America. On the subalpine regions of the Blue and Rocky 

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



Range: Washington to California and Texas. 



Specimens examined: Clallam County, Elmer 2^50; Rock Island, Sandberg cfc Leiberg 

 453; near Priest Rapids, Brandegee 1091; Spokane County, Suksdorf 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 oh short leafy 

 branchlets. 



Petioles slender, glandless ; leaves broadly lanceolate 1.5. 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 the base . 2a. S. caudata. 

 Shrubs, rarely trees, with smooth or at least not furrowed bark; sta- 

 mens 2 or 1. 



Stamen 1 ; aments appearing before the leaves ; leaves very silky 



beneath, entire 21. -S. sitchensis. 



Stamens 2. 



Scales of the aments pale; leaves narrow, appearing before 

 the aments. 



