PIPER—FLORA OF THE STATE OF WASHINGTON. 211 
IBIDIUM. 
Lip much dilated at the apex, the basal swellings small.......-.-.- 1. I. romanzoffianum. 
Lip little dilated at the apex, the basal swellings large .......-..-- 2.1. porrifolium. 
1. Ibidium romanzoffianum (Cham.) House, Muhlenbergia 1: 129. 1906. 
Spiranthes romanzoffiana Cham. Linnaea 3: 32. 1828. 
Gyrostachys romanzoffiana MacM. Met. Minn. 171. 1892. 
Gyrostachys stricta Rydberg, Mem. N. Y. Bot. Gard. 1: 107. 1900. 
Tyre Locaity: “ Unalaschka.”’ 
RancE: 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 cernua 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. Pl. 2: 664. 1891. 
Type Locauity: “In Louisiana.” 
Rance: Washington to California. 
SPECIMENS EXAMINED: Falcon Valley, Suksdorf, September 3, 1881. 
EPIPACTIS. 
1. Epipactis gigantea Dougl.; Hook. Fl. Bor. Am. 2: 202. t. 202. 1839. 
Type cocatity: “N.W. America. On the subalpine regions of the Blue and Rocky 
Mountains. Douglas. Columbia River, about Fort Vancouver. Dr. Scouler.”’ 
Rance: Washington to California and Texas. 
SPECIMENS EXAMINED: Clallam County, Elmer 2550; Rock Island, Sandberg & Leiberg 
453; near Priest Rapids, Brandegee 1091; Spokane County, Suksdorf 240; Seattle, T'ar- 
leton; Lake Crescent, Lawrence 301. 
ZONAL DISTRIBUTION: Upper Sonoran and Transition. 
SALICACEAE. Wittow Famity. 
Stamens 1 to 5in ours; bracts entire. ....-.-.-.------------------- SALIX (p. 211) 
Stamens numerous; bracts fimbriate .-...---.-.-.------.-------+--- Popu.us (p. 217) 
SALIX. WiuLiow. 
Trees with furrowed bark; stamens 5 or more, aments on short leafy 
branchlets. 
Petioles slender, glandless; leaves broadly lanceolate .....-.-- - 1. 8S. amygdaloides 
Petioles short, bearing glands; leaves narrowly lanceolate. 
Leaves pale beneath, attenuate from the middle.......... - 2. 8. lasiandra. 
Leaves green beneath, long, attenuate nearly from the base. 2a. S. caudata. 
Shrubs, rarely trees, with smooth or at Jeast not furrowed bark; sta- 
mens 2 or 1. 
Stamen 1; aments appearing before the leaves; leaves very silky 
beneath, entire.............-..2--.-..2-2-2--------------- 21. S. sitchensis. 
Stamens 2. 
Scales of the aments pale; leaves narrow, appearing before 
the aments. 
