rred --33.

32b. Flowers in terminal racemes, spurred --38.

33a. Leaves a whorl of 5 (2-3 dm. high; petals greenish; late summer)
=Whorled Pogonia, Pogonia verticillata.=

33b. Leaves alternate --34.

34a. Leaves lanceolate or narrowly ovate, 2-8 cm. long, narrowed at
base; flower terminal (1-4 dm. high; flowers pink purple,
early summer) =Snake Mouth, Pogonia ophioglossoides.=

34b. Leaves ovate, 1-2 cm. long, clasping; flowers axillary (5-20
cm. high; flowers purple, summer)
=Nodding Pogonia, Pogonia trianthophora.=

35a. Leaf basal; spur nearly straight
=Rein Orchis, Habenaria obtusata.=

35b. Leaf on the stem; spur strongly curved
=Rein Orchis, Habenaria clavellata.=

36a. Flower-stalk without bracts below the raceme; flowers
yellowish-green =Rein Orchis, Habenaria hookeri.=

36b. Flower-stalk bearing bracts below the raceme; flowers
greenish-white --37.

37a. Spur 15-25 mm. long =Rein Orchis, Habenaria orbiculata.=

37b. Spur 30-50 mm. long =Rein Orchis, Habenaria macrophylla.=

38a. Lip fringed (Fringed Orchis) --43.

38b. Lip not fringed (Rein Orchis) --39.

39a. Lip with 2-3 evident teeth at apex --40.

39b. Lip without apical teeth --41.

40a. Stem-leaves 3 or more =Rein Orchis, Habenaria bracteata.=

40b. Stem-leaves 2 --35b.

41a. Flowers white =Rein Orchis, Habenaria dilatata.=

41b. Flowers greenish-yellow --42.

42a. Lip lanceolate, tapering toward the apex
=Rein Orchis, Habenaria hyperborea.=

42b. Lip oblong, truncate at the apex
=Rein Orchis, Habenaria flava.=

43a. Lip deeply 3-lobed, toothed or fringed --44.

43b. Lip not 3-lobed, but deeply fringed --46.

44a. Flowers purple =Purple Fringed Orchis, Habenaria psycodes.=

44b. Flowers white or nearly so --45.

45a. Spur 3 cm. long or more
=Prairie Fringed Orchis, Habenaria leucophaea.=

45b. Spur 1-1.5 cm. long =Ragged Fringed Orchis, Habenaria lacera.=

46a. Flowers yellow =Yellow Fringed Orchis, Habenaria ciliaris.=

46b. Flowers white
=White Fringed Orchis, Ha