Class XX. Order II. 327 



VMNDRM. 



338. CYPR1PEDIUM. 

 CYPRIPEDIUM ACAULE. Ait. Ladies 9 Slipper. 



Scape leafless, one flowered ; root leaves two, ob- 

 long, obtuse ; lobe of the style round-rhomboidal, acu- 

 minate, deflexcd ; petals lanceolate ; lip longer than 

 the petals, cleft before. Willd. sub. syn. 



Syn. CTPRIPEDIUM HUMILE. Sw. Salts!). Willd. 



This singular genus are readily known by their large, inflated 

 nectary. The present species differs from the rest in having no 

 stem leaves. The leaves are two, springing from the root, large, 

 oval-lanceolate, plaited, downy. Flower commonly single, ter- 

 minal, nodding. Spathe lanceolate. Petals four, spreading, 

 green with a tinge of purple, the upper and under ones lance- 

 ovate, the two lateral ones narrower, longer, hairy inside, slight- 

 ly waved and twisted. Nectary a large, purple, inflated bag, 

 veined, villous, and longer than the petals. Style over the base 

 of the nectary, supporting two lateral anthers on the inside, and 

 ending in a broad, roundish, deflexed, acute lobe, carinated on 

 the inside. Capsule oblong, acute, its sides unequally curved, 

 crowned with the style, opening at the three principal angles 

 by a double fissure, between which the suture or frame work 

 is included. Woods. May, June. Perennial. 



CYPRIPEDIUM PARVIFLORUM. Willd. Yellow Ladies' Slipper. 



Stem leafy ; lobe of the style triangular, acute ; ex- 

 terior petals ovate-oblong, acuminate ; inner petals 

 linear, twisted ; lip shorter than the petals, compressed. 



Syn. CrpRipEoiuM CALCEOLUS. MX. 



Stem erect, downy. Leaves alternate, clasping, oval, nerved, 

 downy. Upper and lower petal ovate-lanceolate, acuminate, 

 green, striped and spotted with dark purple ; lateral petals 

 linear, twisted, striped and spotted, hairy inside at base. Nec- 

 tary oblong-oval, yellow, dotted inside, its aperture round- 

 ish with an inflexed margin. Lobe of the style triangular 

 or deltoid, depressed in the middle with a double keel under- 

 neath, yellow. Stigma rounded. Filaments growing- to fh 



