and subequal, to 2 mm. long and 1 mm. wide; lip longer than the sepals and 

 petals, linear, deeply 2-cleft, auricled on each side at the base; column wingless; 

 capsule small, slender, pedicellate. 



In humus and on mosses of low moist and swampy woods, and in ravines along 

 streams, in s.e. Tex., Feb.-May; locally from Que. and Ont., s. to cen. Fla. and 

 w. to Tex. 



3. Epipactis Sw. 



A genus of about 20 species mainly in temperate and mountainous regions of 

 Europe and Asia, with 2 species in North America. 



1. Epipactis gigantea Hook. Giant helleborine. Fig. 366. 



Plant terrestrial or saxicolous, usually 5 dm. tall or more; stem simple, leafy, 

 from a short creeping rhizome with fibrous roots; leaves clasping stem, plicate- 

 venose, broadly elliptic to linear-lanceolate, 6-20 cm. long, 2-7 cm. wide; in- 

 florescence a few- to many-flowered prominently bracteose more or less secund 

 raceme; floral bracts foliaceous, conspicuously exceeding the flowers; flowers 

 greenish, marked with purplish or reddish nerves; sepals free, lanceolate, sub- 

 equal, spreading or loosely connivent, 15-25 mm. long, 7-9 mm. wide; petals 

 similar to the sepals but smaller: lip sessile on the base of the column, fleshy, 

 saccate at the base, flattened above, distinctly 3-lobed with the lateral lobes 

 erect to form a sac, about as long as sepals; column short, broadened above; cap- 

 sule obovoid to ellipsoid, pendent, 2-2.5 cm. long. Serapias gigantea (Hook.) 

 A. A. Eat. 



On seepage slopes, wet limestone bluffs and ledges, in swamps and marshy 

 places, in Okla. (Murray Co.) and in cen. and w. Tex., N. M. (Eddy, Grant, 

 Guadalupe and Socorro cos.) and Ariz. (Navajo. Coconino, Mohave, Santa Cruz 

 and Pima cos.), Apr.-July; scattered from Mont., S.D., Colo., Okla. and Tex., 

 w. to B.C., Wash., Ore. and Calif.; also Mex. 



4. Pogonia Juss. 



A genus of about 20 species widely dispersed over the world. 



1. Pogonia ophioglossoides (L.) Ker. Rose pogonia. Fig. 367. 



Plants slender, glabrous (propagating by means of root-shoots), 1-7 dm. tall; 

 stem green or brownish-green; leaf solitary, about halfway up the stem (occasion- 

 ally with one or two long-petiolate leaves arising from the base of the stem), 

 ovate to elliptic or broadly ovate-lanceolate, obtuse to subacute, 2-12 cm. long, 

 1-3 cm. wide; inflorescence composed of one to three flowers (usually one) 

 terminating the stem; floral bract foliaceous, oblong-elliptic to oblong-lanceolate, 

 1-3 cm. long, 3-8 mm. wide; flowers rose to white, of several days" duration; 

 dorsal sepal oblong-elliptic to linear-oblong, subobtuse, 1.5-2.3 cm. long, 3-6 mm. 

 wide; lateral sepals narrowly elliptic to linear-oblong or linear-lanceolate, acute 

 to rarely obtuse, 1.5-2.7 cm. long, 3-6 mm. wide; petals oblong-elliptic to elliptic- 

 obovate, broadly rounded at the apex, 1.5-2.5 cm. long, 6-11 mm. wide; lip 

 narrowly oblong-spatulate, narrowed at the base, lacerate-toothed along the apical 

 margin, prominently bearded along the three central veins of the disk with short 

 fleshy yellow-white bristles, 1.5-2.5 cm. long, 8-10 mm. wide near the apex; 

 column about 1 cm. long, toothed at the apex. 



In swamps, bogs, marshes, wet savannahs, prairies and seepage slopes in e. and 

 s.e. Tex., Apr.-July; from Nfld., s. to Fla., w. to Minn., III. and Tex. 



The heavily bearded lip, which forms the lower segment of the flower, is 

 distinctive. 



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