cave, connivent with the petals to form a hood over the column, 3-nerved, 3-6 

 mm. long, 2-3 mm. wide below the middle; lateral sepals strongly reflexed, ovate- 

 lanceolate to linear-elliptic, oblique, obtuse to subacute, 3-nerved, 4-8 mm. long, 

 1.8-2.5 mm. wide; petals ovate to ovate-oblong or lanceolate, more or less falcate 

 or oblique, obtuse to subacute, 3.2-6.5 mm. long, 1.5-3 mm. wide at the obliquely 

 dilated base; lip linear-elliptic to somewhat elliptic-lanceolate or triangular- 

 ovate, obtuse at the apex, tapering or rounded to somewhat angled on each side 

 at the base, strongly arcuate-recurved in natural position, with a thick cushion- 

 callus or tubercle in the middle near the base, often with lightly revolute margins, 

 4-8.5 mm. long, 1.5-3.5 mm. wide below the middle; spur cylindrical, filiform, 

 tapering at the apex, usually about twice as long as the lip, 1-2.5 cm. long; 

 column stout, short, 1-2 mm. long. 



In boggy soil about springs in gulches and canyons, but it is also rather fre- 

 quent in mossy ground in open woods, along cold brooks and in open sedge 

 marshes, in N. M. (Socorro Co.) and Ariz. (Cochise and Pima cos.), June-Sept.; 

 s. through Mex. to Guat. 



12. Habenaria hyperborea (L.) R. Br. Tall northern green-orchid, tall leafy 



GREEN-ORCHID, GREEN-FLOWERED BOG-ORCHID. Fig. 362. 



Plant erect, slender or stout, glabrous throughout, 1.5-10 dm. tall; roots tuber- 

 ous, fusiform, elongated, 5-9 mm. thick; stem leafy throughout or only at the 

 base; leaves several, cauline or produced in a cluster near or at the base of the 

 stem, variable, linear, oblong-elliptic, oblanceolate or linear-lanceolate, obtuse 

 to acuminate, reduced above to bracts, 4.5-30 cm. long, 0.8-4.5 cm. wide at the 

 widest part; raceme spicate, extremely variable in habit, cylindrical to rarely 

 subsecund, densely or laxly few- (rarely 3-) to many-flowered, short and stout to 

 elongated and slender, 3-25 cm. long, 1-2.5 cm. in diameter; floral bracts lanceo- 

 late to linear-lanceolate, acuminate, suberect to spreading, usually cellular-papillose 

 on the margins, the lowermost bracts sometimes up to 3 cm. long and greatly 

 exceeding the flowers; flowers small, variable in size, often fragrant, green or 

 yellowish green, sometimes marked or suffused with brownish purple, congested 

 or remotely spaced on the rachis; dorsal sepal suborbicular-ovate to ovate-elliptic, 

 rounded to obtuse and occasionally minutely cucullate at the apex, concave, erect 

 and connivent with the petals to form a hood over the column, 3-nerved, 3-7 

 mm. long, 1.3-4 mm. wide below the middle; lateral sepals ovate to ovate-lanceo- 

 late or elliptic-lanceolate, obtuse to subacute or sometimes minutely cucullate at 

 the apex, oblique, spreading or strongly reflexed, 3-nerved, 3-9 mm. long, 1-3.5 

 mm. wide below the middle; petals usually fleshy, ovate-lanceolate to lanceolate, 

 falcate, acute to acuminate, obliquely dilated at the base, erect and connivent with 

 the dorsal sepal, 1- to 2-nerved, concave at the base, occasionally tinged or 

 marked with brownish purple, more or less cellular-papillose on the margins, 3-7 

 mm. long, 1-3 mm. wide at the base; lip fleshy, lanceolate to sublinear, not con- 

 spicuously dilated at the base, obtuse to acute at the tapering apex, reflexed or 

 curved upward, 3- to 5-nerved, 3-9 mm. long, 1.5-2.5 mm. wide below the 

 middle; spur cylindrical, slender to somewhat clavate, 2.5-7.5 mm. long, usually 

 shorter than the lip or at most only a little longer than the lip, occasionally only 

 one third as long as the lip; column broad, thick, 1.5-3.5 mm. long; capsule erect, 

 obliquely ellipsoid, suberect, to 1.5 cm. long. 



In moist or wet soil in meadows in mud on edge of streams, turf mats, bogs, 

 thickets, swamps, coniferous or mixed forests, canyons, marshes, in open slopes 

 and clifl"s, along streams and on gravel bars along rivers and lakes, in N. M. 

 (Colfax and Taos cos.) and Ariz. (Apache and Greenlee cos.), June-Sept.; 

 Greenl. and Nfld. to Alas., s. to N.Y., Pa., Neb., N.M., Ariz, and Calif.; Icel. and 

 Asia. 



706 



