OaDEB 138.— OROHIDACEiB. 681 



TRIBES AND GENERA. 



S CTPRIPEDIE^ Anthers 2, fertile, tba 8rd a petal-like nppendago ovor the 



stigma. Lip a large, inflated spurlefis sack CypiiipRnrTTM 1 



§ OPHKTDE^, &c. Anther only 1, terminal or dorsal on tUe stigma. (*) 



* Lip produced behind into a spur which is free from the ovary, (a) 



a Anther erect, terminal.; pdlliniii 2, granular, pedicellate and attached to as 

 many glands on the stigma, which glands are (b) 



b concealed in a pouch (Flowers large, rose-colored, lip entire) in Orchis. 2 



b naked and close together (Flowers small, lip entire or toothed) in...GYHNADExiA. 3 

 b naked and widely separated (Lip entire or lobed, or cleft or fringed.) Platantiieua. 4 



a Anther bent over the end of the stigma like a lid. Pollinia4 Tipulahia. 5 



* hip not produced into a spur behind, or the spur is adnato to the ovary, (c) 



Lip a large, inflated sack with 3 spur-like points below the apes Calypso. 6 



C Lip not saccate. Plants brown, leafless, or with radical leaf, (d) 



d Lip hooded, i. 6., Its margins involute. Pollinia 8. Fla. expanding.. . . .Blktia. 7 

 d Lip concave, sessile, often with an adnate spur. Pollinia 4. ..CoBALLonnizRA. 8 

 d Lip concave, raised on a claw. Pollinia 4. Plant with 1 late leaf. . . Apleoteum. 9 

 C Lip not saccate. Plants green and with leaves, (e) 



e Lip flat. Flowers obscure, in racemes nearly bractless. (f ) 



f Lip entire, dilated ; Colnmn minute. (Leaf 1.) Mycrostylis. 10 



f Lip sagittate or cordate. Column lengthJtned. Leaves 2 Lipparis. 11 



f Lip 2-lobed or cleft at apex. Lvs. 2, cauline opposite Listeea. 12 



e Lip channeled, recnrvotl. Fls. whitish, in hracted spikes, (g) 



g Sepals reflexed. Lip arched and recurved, 3-lobcd CnANionis. 18 



g Sepals erect.— Lip ascending, embracing the column Spirantiieb. 14 



— Lip gibbous beneath, pointed at apex Goodyeea. 15 



e Lip bearded or 8-lobed. Stamen lid-like. Flowers showy, (h) 



Jx Flowers several, purple, with a bearded lip posterior Calopogon. 1G 



h. Flowers with the lip anterior (as in the order generally), (k) 



Ic Column free from the lip^ clavate. Fls. purplish Pogonta. IT 



k Column adherent to thetip below. Fls. purple Aeetiiusa. 13 



k Column adherent to the lip. Fls. yellow. On trees Epidendrum. 19 



1. CYPRIPE'DIUM, L. Lady's Slipper. (Gr. Kvnpig, Venus, 

 nodiov, a slipper ; from the slipper-like form of the lip.) The 2 lower 

 sepals united into 1 segment, or rarely distinct ; petals spreading ; lip 

 inflated, saccate, obtuse ; column terminated by a petaloid lobe (barren 

 stamen) and bearing a 2-celled anther under each wing. — Fls. large, 

 very showy, distinguished for the large, inflated lower petal or lip ; lvs. 

 large, plaited, veined. 



§ Sepals 2, the lower compound of 2 united cither wholly or noov the tip. (*) 



* Stem leofy.— Flowers 1 to 3, mostly hut 1, yellow Nos. 1, 2 



— Flowers solitary or several, white or rose-colored Nos. 8, 4 



* Stem a leafless scape, 2-leaved at base. Flower rose-colored No. 5 



§ Sepals 8, the 2 lower entirely distinct No. 6 



1 C. pubescens Swartz. Labgb Tbllow Ladies Slipper. St. leafy, lvs. 

 broad-lanceolate, acuminate ; sepals lanceolate ; lip sborter than the linear, twisted 

 petals, compressed laterally, convex loth above and below ; sterile stamen triangular, 

 acute ; plant pubescent. — "Woods and meadows, Can. to Wis., S. to Ga. Sts. usu- 

 ally several from the same root, If or mora high. Lvs. 3 to 6' by 2 to 3, many- 

 veined, clasping at base. Flower mostly solitary. Segm. 4, greenish with 

 purple stripes and spots, the lower bifid, composed of 2 united sepals, the lateral 

 2 to 3' by 3", wavy and twisted. Lip moccasin-shaped, bright-yellow, spotted 

 inside, with a roundish aperture. May, Jn. 



2 C. parviflbrum Salish. Smaller Yellow Ladies' Slipper. St. leafy ; lvs. lan- 

 ceolate-acuminate ; Sep. ovate or lance-ovate ; lip shorter than the petals, compressed 

 from above amd beneath; sterile stamen triangular, acute; plant pubescent. — In 

 low woods and prairies, Can. to Wis. and Ga. (Miss Wyman). More common 

 westward. Plant 8 to 12' high, rarely taller, very leafy. Flower a third smaller 

 than in No. 1. Petals 1 to 38", twisted or not. Upper sep. broadest. Lip evi- 

 dently flattened on the upper side, convex laterally, dull yellow. May, Jn. 



