13. Habenaria saccata Greene. Slender bog-orchid. 



Plant strictly erect, slender or stout, glabrous and light green throughout, 

 1.5-10 dm. tall; roots tuberous, fusiform, 5-10 mm. in diameter; stem leafy, 

 provided below with one or more tubular sheaths; leaves scattered on the stem or 

 occasionally clustered near the base, usually narrowly elliptic to linear-lanceolate 

 or rarely oblanceolate, rounded to subacuminate at the apex, scarcely or not at 

 all sheathing the stem, 4-14 cm. long, 1-4 cm. wide; raceme spicate, usually 

 much-elongated, laxly few- to many-flowered, slender, cylindrical to subsecund, 

 4-42 cm. long, 0.8-2 cm. in diameter; floral bracts linear-lanceolate, acuminate, 

 cellular-papillose on the margins, the lowermost to 6 cm. long and greatly exceed- 

 ing the flowers; flowers small, green, commonly tinged or marked with purplish 

 brown, usually scattered along the elongated rachis; sepals rather thin and 3- 

 nerved, the petals and lip fleshy; dorsal sepal suborbicular to ovate or ovate-elliptic, 

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

 and connivent with the petals to form a hood over the column, 3-5 mm. long, 

 3-3.5 mm. wide near the base; lateral sepals spreading or reflexed, triangular-ovate 

 to elliptic-lanceolate, oblique, obtuse, 4-6 mm. long, 2-3 mm. wide near the base; 

 petals triangular-lanceolate to elliptic-lanceolate, falcate, obtuse to acute, obliquely 

 dilated and auriculate at the base, usually purplish, 1- to 2-nerved, 3-5 mm. long, 

 1.5-2.2 mm. wide at the base; lip linear to occasionally ovate-elliptic, sometimes 

 tapering at the apex, obtuse to acute, usually purplish, 4-7.5 mm. long, 1-2 mm. 

 wide; spur broadly cylindric-clavate to scrotiform, sometimes slightly didymous, 

 usually broadly rounded at the apex, often purplish, one-third to two-thirds the 

 length of the lip, rarely longer; column short, thick, about 2 mm. long, sometimes 

 with a rather broad connective; capsule erect, obliquely ellipsoid, about 1 cm. 

 long. 



In moist or wet soil in meadows, fields, bogs, thickets, swamps, marshes, 

 canyons, coniferous forests, on open seepage slopes, ledges and in or along streams, 

 in N. M. (Colfax, San Miguel, Santa Fe and Taos cos.) and Ariz. (Apache, 

 Greenlee and Graham cos.) May-Sept.; N.M., Ariz, and Calif., n. to Alas. 



14. Habenaria sparsiflora Wats. Sparsely-flowered bog-orchid. Fig. 363. 



Plant strictly erect, slender or stout, glabrous and rather light green throughout, 

 1.5-7.5 dm. tall; roots fusiform, fleshy-thickened; stem more or less leafy, pro- 

 vided at the base with tubular sheaths, often several produced from the same 

 rhizome (cespitose); leaves variable, scattered on the stem or occasionally clustered 

 near the base, oblong-elliptic or oblanceolate-elliptic to linear-lanceolate or rarely 

 linear, broadly rounded to acuminate at the apex, 6.5-30 cm. long, 1-5 cm. wide; 

 raceme spicate, usually laxly few- to many-flowered, occasionally rather densely 

 flowered, usually much-elongated, 1-4.5 dm. long, 1-3 cm. in diameter; floral 

 bracts narrowly lanceolate, acuminate, usually about equaling the flowers or the 

 lowermost bracts to 4 cm. long and greatly exceeding the flowers; flowers light- 

 green, usually scattered in an elongated raceme, the lowermost often remote; 

 dorsal sepal suborbicular to suborbicular-ovate or ovate-elliptic, broadly rounded 

 to obtuse at the apex, concave, erect and connivent with the petals to form a hood 

 over the column, 3-nerved, 6-7.5 mm. long, 4.5-6 mm. wide near the base; 

 lateral sepals strongly reflexed, ovate-elliptic to elliptic-lanceolate, obtuse, oblique, 

 3-nerved, with the margins usually revolute, 6-10 mm. long, up to 4 mm. wide; 

 petals rather fleshy, triangular-lanceolate to narrowly lanceolate, falcate, obtuse 

 to acuminate, obliquely dilated at the base and somewhat auriculate, often cellular- 

 papillose on the margins, 1- to 2-nerved, connivent with the dorsal sepal, 6-8 

 mm. long, 3-4.5 mm. wide near the base; lip fleshy, large for the flower, con- 

 spicuously pendent, linear to linear-elliptic or sometimes linear-lanceolate, obtuse 



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