288 THE FLORA. 



§ Leaves radical and only 2 (rarely 8). Flowers on a scape. . . .1-3 

 § Leaf radical and only 1. Flowers small, on a scape ... .4, 5 

 § Leaves on the stem, several, upper ones reduced to bracts. . . .a 



a Corolla lip entire, neither lobed, fringed, nor toothed 6-9 



a Corolla lip 2 or 8-toothed, not fringed nor divided. Flowers greenish 10-12 



a Corolla lip cleft into a fringe at the edge, but not divided 13-15 



a Corolla lip divided into 8 parts, which are fringed or not. . . .b 



b Flowers white or yellowish, with 5 long bristles, the 2 side petals 2-part6d. 



S....16,17. 

 b Flowers white, the 2 side petals entire' or toothed ; lip clawed. . . ,18, 19 

 b Flowers purple, numerous, showy ; lip raised on a claw 20-22 



1 O. spectab'ilis. SJwwy Orchis. True Orchis. FIs. few, pink-purple, handsome. 



Leaves oblong-ovate. Height ir-1'. (Figs. 649, 650.) 



2 O. orbicula'ta. Mmmd-lv. O. FIs. whitish, racemed. Spur very long. Leaves 



round. Scape bracted. 



3 O. Hook'eri. Hooker^s 0. Flowers green, spiked; Spur long as ovary. Leaves 



round. Scape naked. « 



4 O. obtusa'ta. Blunt-h>. 0. Leaf obovate, obtuse. Lip linear, entire. 5-8'. r. 



5 O, rotimdifo'lia. SmaU EounA-lf. 0. Lf. round. Lip, mid. lobe obcord. 6-9'. r. 



6 O. hyperbo'rea. Northern O. Flowers greenish. Lip, petals, leaves, and bracts, 



lanceolate. 



7 O. dilata'ta, Mroad-Mp 0. Flowers whitish. Lip lance-linear, rhombic at base. 



8 O. niv'ea. Snowy 0. Flowers white. Lip oblong-linear. Leaves linear. S. 



9 O. nigra. Blach 0. Flowers yellow, close. Lip ovate. Leaves lance-oblong. 



10 O. tridenta'ta. Trident 0. Lip 3-toothed at end. Spur longer than ovary. 



11 O, bractea'ta. Br.acted 0. Lip 2-3-toothed at end, spur half as long. 



12 O. fla'va. Small yellow 0. Lip obtuse, with a tooth each side, spur long. 



13 O. orista'ta. Crested yellow 0. Flowers yellow, small, lip as long as the spur. 



14 O. cilia'rls. Large yellow 0. Flowers yellow, large, lip half as long as the spur. 



15 O. Blephariglot'tis. Om-tongue 0. FIs. white, large ; 2 side petals cut-toothed. 



16 O. Michauzii, Michaux's 0. Leaves oval. Spur twice as long as ovary. 



17 O. re'pens. Five-iristled 0. Leaves lance-linear. Spur shorter than ovary. 



18 O. leucophae'a. White Prairie 0. Bracts shorter than the ovaries. Lip fan- 



shaped, 3-parted, fringed. Spur club-shaped, twice longer than ovary^ 



19 O. lao'era. Bagged 0. Bracts longer than the flowers. Petals notched at end. 



Lip segments wedge-shaped, fringed. Spur filiform, long as ovary. 



20 O. amoena. Prairie 0. Flowers dark-purple., Lip broad, lobes toothed, not 



fringed. M. W. S. c. 



21 O. Psyo'odes. Fringed 0. Flowers light-purple. Lip wedge-shaped, the 2 



petals merely toothed, c. 



22 O. grandiflo'ra. Great-fl. 0. Flowers light-purple. Lip semicircular, large. 



2 petals fringed, r. 



