500 ORCHIDACE^E. (ORCHIS FAMILY.) 



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



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



Siberian H. (Perularia) fuscescens is clearly distinct. 



3. PLATANTHERA, Richard. Cells oftJie anther sometimes parallel, more com- 

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

 less distant. (Root 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. 



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

 rather icidely separated. (PERfsxYLUS, Lindl.) 



4. H. viridis, R. Br., var. bracteata, 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-flowered ; 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. hyperbbrea, 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. dilatata, Gray. (That of Hook, Exot. Fl. is the preceding.) Re- 

 sembles No. 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, vertical, 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, Pursh.) Cold bogs : common northward. June, July. 



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



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

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



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

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

 ple, 3-hbed, 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 said parallel. (O. rotundifolia, 

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

 Co., New York, J. A. Paine; shore of L. Michigan in Wisconsin, Lewis Foole, 

 and northward. J une. 



