PIPER FLORA OF THE STATE OF WASHINGTON. 205 



ORCHIDACEAE. Orchid Family. 



Perfect anJiers 2; lip large, sac-like Cypripeuium (p. 205). 



Perfcc' aniher 1. 



Plants saprophytic, without green herbage. 



Flowers spurred, reddish oi white Coralloriiiza (p. 206). 



Flowers spurless, white Cephalanthera (p. 206). 



Plants with ordinary green herbage. 



Flower and leaf solitary; plant bulbous Cytherea ( p. 207 ). 



Flowers several to many in racemes. 

 Leaves only two. 



Both leaves caulinc; lip 2-lobed Opurys (p. 207). 



Both leaves basal; lip entire Leptorchis (p. 208). 



Leaves more than two. 



Cauline leaves reduced to bracts. 



Basal leaves several, white-reticulated. . Peramium (p. 208). 



Basal leaves two, green and shining Lysias (p. 208). 



Cauline leaves not reduced to bracts. 

 Anther on the face of the column. 



Stem leaves abruptly reduced; lat- 

 eral sepals adnate to tlie base of 



thelip PiPERiA (p. 208). 



Stem leaves gradually reduced ; lat- 

 eral sepals free Limnorcius (p. 209). 



Flowers spirally arranged in a dense 



spike InimuM ( p. 21 1 ). 



.\ntheis on tlu- sunmiit of tiie coluinn. 



B^lowers in a loose leafy raceme Epipactis (p. 211). 



CYPRIPEDIUM. Lady's slipper. 



Lip about 1 cm. long; flowers greenish brown 1 C. fasciculatum. 



Lip 1.5 to 5 cm. long; flowers not greenish brown. 



Flowers yellow; lip 1.5 to 3 cm. long 2. C. jHirviJiorum. 



Flowers brown, with a white lip 3 to 5 cm. long 3. C. viontanum. 



1. Cypripedium fasciculatum Kellogg; S. Wats. Proc. Am. Acad. 17: 380. 1882. 

 Type locality: "On the White Salmon River above the falls," Washington. Collected 



by Suksdorf. 



Range: Washington to California. 



Specimens examined: Klickitat County, Siiksdoif 900, 310, May, June, 1^886; Wen-' 

 ache Region, Brandegee 1095. 



2. Cjrpripedium parviflorum Salisb. Trans. Linn. Soc. 1: 77. 1791. 

 Type locality: "Sponte nascentem in Virginia." 



Range: British Columbia to Newfoundland south to Washington, Missouri, and (ieorgia. 



Specimens examined: Spokane County, Sandberg & Leiberg 125; Suksdvrf 94(); Spo- 

 kane, Piper, May, 1897; Henderson 2478. 



Our western form corresponds to C. fiavescens DC. in Redoute, Lil. 1 : pi. 20. 1802, 

 questionably distinguishable by somewhat narrower leaves and with the lip a little com- 

 pressed laterally. 



3. Cypripedium montanum Dough; Lindl. Gen. & Sp. Orch. 528. 1840. 

 Type locality: "Ilab. in America boreali-occidentali." Collected by Douglas. 

 Range: Washington and Idaho to California. 



Specimens examined: Mount Stuart, Sandberg cfe Leiberg 572; Wenache Mountains, 

 Whited 152; Clealum, Henderson, iuvrn, 1892; Kalispel Valley, Kreager in 1902; Mount 



