346 ORCHIlDACEyE. 



III. OPHRE.E.. Pollen powdery, granular or sectile. Anther ter- 

 minal^ erect. 



7. ORCHIS. Linn. Orchis. 



(An ancient Greek name.) 



Perianth ringent. Lip with a spur on the under side at base. 

 Pollen masses pedicellate ; glands of the pedicels contained in 

 one common little pouch. 



0. spectabilis Linn. : leaves 2, radical, elliptic-obovate, obtuse ; scape an- 

 gular, naked, few-flowered, scarcely longer than the leaves ; bracts longer 

 than the flowers ; spur clavate, shorter than the ovary. O. humilis Mich. 

 Habenaria spectabilis Spreng. 



Shady woods. Can. to Car. W. to Miss. June. %. Scape 4 6 inches 

 high, 5-angled, smooth. Leaves mostly 2, nearly as long as the scape. Flowers 

 46, in a terminal spike, large, purplish and white. Showy Orchis. 



8. GYMNADENIA. Brown. Gymnadenia. 

 (From the Greek yv/jvoj, naked, and afav, a gland.) 



Lip with a spur at the base. Glands of the stalks of the 

 pollen-masses naked, approximated. 



G. tridentata Lind. : lower leaf oblong, rather acute, upper leaves much 

 smaller ; flowers few, in an oblong terminal spike ; lip cuneate-oblong, 3- 

 toothed at the apex ; segments of the perianth connivent, oblong-ovate, 

 obtuse ; spur clavate, incurved, longer than the ovary. Habenaria triden- 

 tata Hook. Orchis tridentata Willd. 



Swamps. Can. to Virg. June, July. 1J-. Stem 8 18 inches high, slender, 

 Flowers pale-yellowish-green, small, 6 12 in a compact terminal spike. Lip 

 with 3 short equal teeth at the apex. Three-toothed Gymnadenia. 



9. PLATANTHERA. Rich. Platanthera. 

 (From the Greek irAa?, broad, and avdepa, an anther.) 



Lip entire, with a spur at the, base. Cells of the anther 

 widely separated. Glands of the pollen-masses pedicellate; 

 the glands naked. 



* Lip undivided. 

 f Scape nearly naked. 



1. P. obtusata Lind. : upper segment of the perianth very broad ; inner 

 segments triangular, truncate at the apex ; lip linear, with two minute tu- 

 bercles at the base ; spur subulate-conic, curved, as long as the lip. Orchis 

 obtusata Pursh. 



Woods on the sides of mountains in Essex county, N. Y. Torr. White 

 Mountains, N. H. Boott. Hudson's Bay. Pursh. Aug. 7J.. . Stem 5 8 inches 

 high, slender. Leaf solitary, radical, oblong-obovate. Flowers 5 8, greenish, 

 erect, in a rather loose terminal spike. Obtuse-leaved Platanthera. 



2. P. orbiculata Lind. ; upper segment of the perianth orbicular, the 



