178 ORCHIDACEAE 



5. C. Knightae A. Nels. Stem 3-10 cm. high, more or less villous-viscid 

 in the inflorescence; leaves oval to nearly orbicular, 5-10 cm. long, glabrous or 

 nearly so; sepals and petals purplish, ovate-lanceolate, acuminate, about 2 cm. 

 long; lip 10-12 mm. long, greenish yellow, with deep purple margins; sterile 

 stamen oblong, obtuse. Open woods and hillsides: Wyo. Utah Colo. Sub- 

 mont. Ap-Je. 



3. ORCHIS (Tourn.) L. ORCHIS. 



Perennial herbs, with digitately cleft tubers, or in our species with rootstocks 

 and fibrous roots. Flowers in terminal spikes. Sepals distinct, equal, spread- 

 ing, 3-nerved. Petals ascending, in ours narrower. Lip connate with the col- 

 umn, produced below into a spur, usually 3-cleft. Column short. Fertile 

 anther solitary, 2-celled; sacs contiguous and slightly diverging; pollinia granu- 

 lose, one large mass in each sac, produced into a slender caudicle, attached to 

 a small gland, which is enclosed in a pouch. 



1. O. rotundifolia Pursh. Perennial, with a rather slender scaly rootstock ; 

 stem 1-2.5 dm. high, scape-like; leaf solitary, near the base, orbicular or oval, 

 3-7 cm. long; spike 2-6-fl owered ; flowers 12-15 mm. long; sepals elliptic, 6-7 mm. 

 long, rose-colored, the lateral ones spreading; upper petals similar, but slightly 

 shorter; lip white, purple-spotted, 3-lobed, with a large middle lobe, notched at 

 the apex; spur slender, curved, shorter than the lip. Cold damp woods: Greenl. 

 -N.Y. Minn. B.C. Yukon. Subalp. Boreal. Je-Jl. 



4. COELOGLOSSUM Hartman. 



Caulescent herbs, with 2-cleft biennial tubers. Leaves alternate, sessile. 

 Flowers perfect, in elongated terminal spikes, greenish. Sepals distinct, con- 

 verging, thus forming a hood. Lateral petals narrow, erect; lip obtuse, 2- or 

 3-toothed at the apex, produced below into a sack-like spur. Column short. 

 Fertile anther solitary; anther-sacs 2. Pollinia solitary, with long caudicles. 

 Gland small, . surrounded by a thin membrane. 



1. C. bracteatum (Willd.) Parl. Stem 1.5-6 dm. high; leaves 3-5, obovate, 

 oblanceolate, oval, or the upper narrowly lanceolate, 5-15 cm. long; bracts linear- 

 lanceolate, longer than the flowers; flowers green or greenish; sepals lanceolate, 

 about 6 mm. long; lip 6-8 mm. long, oblong or somewhat cuneate, 3-toothed at 

 the apex, the middle tooth smallest; spur less than half as long as the lip. Haben- 

 aria bracteata (Willd.) R. Br. Wet meadows and woods: N.B. -N.C. Colo. 

 B.C. Mont. Boreal. My-S. 



5. LYSIAS Salisb. 



Subacaulcscent herbs, with fleshy rootstocks or tubers. Leaves almost 

 basal, 2 in number, broad and many-nerved. Flowers in terminal spikes, white 

 or greenish. Sepals distinct, large, spreading; upper sepal in ours broadly cor- 

 date, the lateral ones obliquely ovate. Lateral petals small and narrow. Lip 

 entire, narrow, produced below into a slender spur. Fertile anther solitary; 

 sacks diverging, with beak-like bases projecting forward. Pollinia with their 

 caudicles laterally affixed to orbicular naked glands. Stigma without append- 

 ages. 



Leaves orbicular or rounded oval; spur slightly clavate at the apex. 1. L. orbiculata. 

 Leaves oval or ovate; spur strongly clavate and curved at the apex. 2. L. Menziesii. 



1. L. orbiculata (Pursh.) Rydb. Scape stout, 3-6 dm. high, bearing several 

 lanceolate bracts; basal leaves 1-1.5 cm. long, 8-12 cm. wide; raceme loosely 

 many-flowered; lateral petals obliquely lanceolate; lip linear, 12-15 mm. long; 

 spur 2-4 cm. long. Habenaria orbiculata (Pursh) Torr. Rich woods: Newf. 

 N.C. Minn. Wash. (? B.C.). Mont. Boreal. My-Au. 



2. L. Menziesii (Lindl.) Rydb. Scape 3-4 dm. high, with 1-2 lanceolate 

 bracts; basal leaves 10-12 cm. long, 6-8 cm. wide; raceme lax; pedicels 7-10 mm. 

 long; lateral petals narrowly lanceolate; lip narrowly linear, 8-10 mm. long; 

 spur less than 2 cm. long. Platanthera Menziesii Lindl. Wet woods: Mont. 

 Ida. B.C. Mont. Jl-Au. 



