long; sepals ovate, rounded to obtuse at the apex, 4-5 mm. long, about 2.5 mm. 

 wide; lateral sepals oblique; petals ovate, obtuse, irregularly sinuate along the 

 apical margin, 3-5 mm. long, about 2 mm. wide; lip narrowly oblong-cuneate, 

 truncate and sinuately tridentate at the apex, 3-7 mm. long, 3-4 mm. wide at the 

 apex; spur longer than the pedicellate ovary, slender-clavate (rarely cleft at the 

 apex), curved upward, 8-12 (averaging less than 10) mm. long. Gymnadeniopsis 

 clavellata (Miohx.) Rydb. 



In water or at edge of water along streams in forests, swamps, on wooded 

 seepage slopes and in ravines in e. Tex., June-Aug.; from Nfld., s. to n. Fla., w. 

 to Tex., Ark., Mo. and Minn. 



The narrowly oblong-cuneate lip that is truncate and sinuately tridentate at 

 the apex is characteristic of this species. 



17. Habenaria viridis (L.) R. Br. var. bracteata (Muhl. ex Willd.) Gray. Long 

 BRACTED Habenaria, long-bracted orchid, satyr orchid, frog orchid, 



AMERICAN FROG ORCHID. 



Plant stout, occasionally slender, glabrous throughout, 1-6 dm. tall; roots 

 fleshy, palmate, from a thickened and swollen rootstock; stem leafy; leaves 

 variable, the lower blades obovate to oblanceolate, the upper blades oblong to 

 lanceolate, obtuse to acute, 4-15 cm. long, 1-6.5 cm. wide; raceme densely or 

 laxly flowered, to 20 cm. long; floral bracts linear-lanceolate, acuminate, 1.5-5.5 

 cm. long, or more, usually 2 to 4 times the length of the flower (according to 

 the age of the plant); flowers green, with stout pedicellate ovaries which are 

 5-10 mm. long; dorsal sepal ovate-orbicular to oblong-elliptic, concave, 3-6 mm. 

 long, 2-3.5 mm. wide; lateral sepals obliquely ovate-oblong, obtuse, 4-6 mm. 

 long, 2-4 mm. wide below the middle; petals linear-lanceolate to linear-oblong, 

 acute to subobtuse, 3-5 mm. long; lip narrowly oblong-spatulate or narrowly 

 cuneate, 2- to 3-toothed at the apex (the middle tooth short and often obscure), 

 5-10 mm. long, 2-4 mm. wide near the apex, with a small thickened keel along 

 the center below the middle, occasionally tinged with reddish-brown, 2 to 3 times 

 longer than the abbreviated saccate whitish spur; spur scrotiform; capsule ellipsoid, 

 7-10 mm. long. 



In moist or wet soil in dense hardwood or mixed coniferous-hardwood forests, 

 in meadows, prairies, thickets, bogs and swamps and in open grassy slopes, in 

 N. M. (San Miguel and Sierra cos.), Mar.-Aug.; Nfld. to Alas., s. to N. C, la. 

 and N.M.; Icel., Jap. and China. 



2. Listeria R. Br. 



Small inconspicuous terrestrial herbs with fibrous roots; stems slender, more 

 or less glandular-pubescent above the 2 opposite or subopposite leaves; leaves 

 sessile, inserted about the middle of the stem; inflorescence a terminal raceme 

 composed of small greenish or purplish flowers; sepals and petals free, similar 

 and subequal; lip longer than the sepals and petals, bilobed or 2-cleft at the 

 apex, variously toothed, auricled, lobed or sometimes entire on each side at the 

 base; column wingless; stigmas with a rounded beak; anther borne on the back of 

 the column near the apex; poUinia 2, powdery; capsule small, slender pedicellate. 



A small genus of about 20 species widely distributed in boreal and temperate 

 regions of the Northern Hemisphere. 



1. Lip with a short slender claw, narrowly cuneate, shallowly notched at apex, 

 8-13 mm. long, 5-7 mm. wide near apex; column 2.5-3 mm. long 

 1. L. convallarioides. 



1. Lip sessile, linear-oblong, cleft halfway or more to the base into linear-filiform 

 to linear-lanceolate lobes, not flaring at the apex; column 0.5 mm. 

 long or less (2) 



711 



