500 okchidacejE. (orchis family.) 



elongated and often loose, the upper bracts shorter than the flowers; which 



arc quite small, and with scarcely a tinge of yellow, drying brownish. — The 



Siberian H. (Perularia) faseescens is clearly distinct. 



§ 3. PLATAKTHSIRA, Richard. Cdls of the anther sometimes parallel, more com- 

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

 less distant. [Hoot a cluster of fleshy fibres, or tuberous-thickened.) 



* Flowers greenish or white, 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. 

 -t- Spur short and sac-like : the 3 sepals and 2 narrow petals erect : glands small, 

 rather iridely separated. (PeeIsttlus, Lindl.) 



4. H. viridis, K. Br., var. bracte&ita, Reichenbach. Lower leaves obo- 

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

 times the length of the green flowers ; spike 1 - 30-flowercd ; lip oblong-linear 

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

 twice the length of the spur. (H. bracteata, R. Br.) — Stem 6' -12' high. 

 According to Mr. Darwin, in the common European H. viridis each gland is 

 protected by a minute pouch ; this is not yet verified In ours. — Damp woods, 

 especially northward. (Eu.) 



->- -^ Spur slender, incurved, about as long as the entire lip : lateral sepals spreading. 



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

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

 (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. (P. hyper- 

 borea, Huronensis, &c. , Lindl. ) — Peat-bogs and wet cold woods : common north- 

 ward. June, July. (Eu.) 



6. H. dilatita, Gray. (That of Hook, Exot. ri. is the preceding.) Re- 

 sembles Xo. 5, but usually more slender, with narrower commonly linear leaves; 

 flowers white; lip lanceolate from a rhomboidal-dilated base, entire, its base'with the 

 bases of other petals and sepals erect-connivent, above spreading ; anther-cells 

 almost parallel ; glands approximate, large and strap-shaped, vesical, nearly as long 

 as the pollen mass and its short flat stalk together ; stigma narrow ; a trowel- 

 shaped conspicuous beak (rostellum) between the bases of the anther-cells. 

 (Orchis dilatata, PureA.) — Cold bogs : common northward. June, July. 



* * Flowers greenish or white and purple, few or several (5-15) in u loose spike, 



rather large for the size of the plant: scape or stem naked above, 1-leaved at the 

 base (5' -9' high) : spur not longer than the lip: anther-celts wholly adnate. 



7. H. rotundifdlia, Richardson. Leaf varying from almost orbicular to 

 oblong ( 1 1' - 3' long) ; flowers rose-purple ; or the lip white and spotted with pur- 

 ple, 3-lohed, and the larger middle lobe dilated and 2-lobed or strongly notched at the 

 summit (4" - 6" long), exceeding the ovate-oblong petals and sepals, and the 

 slender depending spur; anther-cells contiguous and parallel. (0. rotundifolia, 

 Pursh.) — Damp woods and bogs, N. Maine, Mr. Goodrich; Warren, Herkimer 

 Co., New York, /. ^1. Painf; shore of L. Michigan in Wisconsin, Lewis Foote, 

 and northward. June. 



