ORCHIDACEiE. (ORCHIS FAMILY.) 507 



Dviite, entire or slightly crenulate or wavy, shorter thau tJie awl-shaped de- 

 scendiug spur. — AVet pine-barrens, N. J. to Fla. July. — Appendages of the 

 stigma two, latei'al, oblong, fleshy ; beak or middle appendage narrow. 



3. H. nivea, Spreng. Stem slender, 1 - 1-^° high, many-leaved, the 1 oi 

 2 lower leaves lance-linear and 4-8' long, the others small and bract-like ; 

 S])ike cylindrical, loosely many-flowered ; Jioicers white, small : petals and entirt 

 Up linear-oblong ; spiir thread-shaped, ascending, as long as the white ovary. 

 which is not twisted. — Pine-barren swamps, S. Del. to Fla. Aug. 



'S 2. PERULARIA. Cells of the anther nearlij parallel, the valves of each ex- 

 tended at base so as to form the sides of a deep oblong groove or cavitj, ivhick 

 is lined bij the dilated orbicular and incurved gland. {Flowers small, green- 

 ish , slender-spurred. ) 



4. H. virescens, Spreng. Leaves ovate-oblong or oblong-lanceolate, 

 the uppermost linear-lanceolate and pointed, passing into the bracts of the 

 elongated raceme ; petals ovate ; flowers dull green ; lip furnished with a tooth 

 on each side and a strong nasal protuberance in the middle of the base, oblong, 

 truncate-obtuse, about the length of the sepals, half the length of the slender 

 club-shaped spur. — Wet places, common ; N. Eng. to Fla., west to Minn, and 

 ]\ro. June, July. — Stem 10 - 20' high ; the spike at first dense, with the bracts 

 longer than the flowers, at length elongated and often loose, the upper bracts 

 shorter than the flowers, which are quite small, and with scarcely a tinge of 

 yellow, drying broAvnish. 



§ .3. PLATAXTHERA. Cells of the anther sometimes parallel , more commonlji 

 divergent, so that their tapering bases and the exposed glands are more or less 

 distant. (Root a cluster of flesh g fibres, or tuberous-thickened .) 



* Flowers greenish or ivhite, small, numerous in a close spike; spur not longer 

 than the entire or merely notched narrow lip ; anther-cells almost parallel, 

 wholly adnate ; stem leafy. 



•*- Spur short and sac-like ; the 3 sepals and 2 narrow petals erect ; glands small, 



rather xoidely separated. 



5. H. braete^ta, R.Br. Stem 6-12' high; lower leaves obovate, the 

 upper oblong and gradually reduced to lanceolate acute bracts 2-4 times the 

 length of the green flowers ; spike 10 - 30-flowered ; lip oblong-linear or slightly 

 spatulate, truncate and 2 - 3-toothed or lobed at the tip, more than twice the 

 length of the white spur. (H. viridis, var. bracteata, Retchenb.) — Damp woods 

 and meadows, X. Eng. to Minn., Iowa, Ind., south in the mountains to X. C, 

 and far northward. 



^- ■•- Spur slender, incurved, about equalling the entire lip; lateral sepals spreading, 



6. H. hyperborea, R. Br. Stem very leafy (6' - 2° high) ;' leaves lanceo- 

 late, erect ; spike dense (2-15' long) ; lower bracts lanceolate, longer than the 

 I greenish) flowers ; lip and petals lanceolate, somewhat equal , the latter spreading 

 from the base ; anther somewhat overhanging the transversely dilated stigma ; 

 glands orbicular: stalk of the pollen-masses very slender and weak. — Peat 

 bogs and wet cold woods, X. Eng. to X^. Y., S. 111., Iowa, and northward. 

 June, July. (En.) 



7. H. dllatata, Gray. Resembles n. 6, but usually more slender, with 

 narrower commonly //«ear leaves ; flowers white; lip lanceolate from a rhom- 



