352 ORCHIDACE^. 



Shady woods. Can. to Virg. July, Aug. %. — Rhizoma creeping. Scap 

 6—8 inches high. Leaves less distinctly veined than in the preceding. Flowen 

 greenish-white. Smaller Goodyera. 



VI. Cypripedeje. Anthers 2, with a large dilated lobe or abortive 

 stamen between them. 



17. CYPRIPEDIUM. Linn.— Ladies' Slipper. 

 (From the Greek Kvn-ptf, Venus, and noSeoiv, a slioe.) 

 Perianth with the two outer lateral (or lower) segments mostly- 

 united nearly to the apex. Lip large and inflated. Column 

 short, cernuous, 3-lobed; the middle lobe (sterile stamen) 

 dilated and petaloid. 



1. C. candidum Willd : stem leafy ; leaves oblong-lanceolate ; lip com- 

 pressed, shorter than the lanceolate segments of the perianth ; sterile stamen 

 lanceolate, rather obtuse, 



Penn. Muhl. May. %. — Resembles C. Calceolus ; but the flowers are white 

 and not half the size ; the form of the leaves and of the sterile stamen distinguish 

 it sufliciently. Pursh. A doubtful species. While Ladies' Slipper. 



2. C. parvijlorum Willd. : outer segments of the perianth ovate-oblong, 

 acuminate ; inner ones lance-linear, contorted ; lip shorter than the peri- 

 anth ; sterile stamen triangular, acute. C. Calceolus Mich. 



Woods and swamps. Can. to Car. W. to Miss. May, June. %. — Stem 

 12 — 18 inches high. Leaves ovate, clasping at base, pubescent. Flowers soli- 

 tary or in pairs. Outer segments of the perianth green with purple stains ; lip 

 yellow, spotted, an inch and a half long, inflated. Yellow Ladies' Slipper. 



3. C. pubescens Swartz : stem leafy ; outer segments of the perianth lan- 

 ceolate, acuminate ; inner ones very long, linear and contorted ; lip laterally 

 compressed, shorter than the inner segments; sterile stamen triangularj 

 obtuse, (acute, Hook.) 



Woods. Subarct. Amer. to Car. W. to Miss, May. %. — Stem 1—2 feet 

 high. Leaves large, ovate-lanceolate, pubescent. Flowers solitary or in pairs. 

 Segments of the perianth greenish-yellow, spotted with purple ; lip yellow, 

 1 — 1 J inches long, much inflated. Closely resembles the preceding, but prob- 

 ably distinct. Large Yellow Ladies' Slipper. 



4. C. spectabile Swartz: stem leafy; outer segments of the perianth 

 ovate, obtuse, longer than the flat lanceolate inner ones ; lip longer than the 

 inner segments ; sterile stamen cordate-ovate, obtuse. C. Canadense Mich. 



Swamps and bogs. Can. to Car. June, July. %. — Stem 1 — 2 feet high. 

 Leaves ovate-lanceolate, plaited, resembling those of Veratrum viride. Flowers 

 2 — 3, very large. Segments of the perianth white ; lip variegated with stripes 

 of purple and white, an inch or more long, much inflated. 



Showy Ladies' Slipper. 



5. C, acaule Ait : scape leafless, 1-flowered ; radical leaves 2, oblong, 

 obtuse ; outer segments of t.ie perianth ovate-lanceolate ; lip cleft in front ; 

 sterile stamen roundish-rhomboid, acuminate, deflected. C, humile Salisb. 



Shady woods, Subarct, Amer. to Car. May, June. 'Zj..— -Scope 6 — 10 inches 

 high, with two oval or elliptic-lanceolate leaves near the base. Flower solitary. 



