ORCHIDE^E. 351 



M. ophioglossoidcs Nutt. : . scape 1 -leaved ; leaf ovate, amplexicaule ; 

 lip truncate, emarginate. 



HAB. Roots of trees. N. S. June. 1. Root bulbous. Scape 

 a span high, 1-leaved, with a foliaceous sheath near the base, 

 many-flowered. Flowers minute, greenish-white. 



16. CALYPSO. Salislt. 



Segments of the perianth ascending, secund. Lip ventri- 

 cose, spurred beneath near the end. Column petaloid, dilated. 

 Pollinid 4. Gynandria. Monandria. 



C~. americana Breton: lip narrowed and subunguiculate at base; spur 

 semibifid, longer than the lip, with acute teeth ; peduncle longer than 

 the ovary. C. borealis Pursh. Limodorum boreale Willd. . - ^ 



HAB. Near Montreal. N. to Nova Scotia. Near the outlet of 

 Lake Michigan and W. to the Columbia river.- Scape 6 8 in- 

 ches high, sheathed, 1 -flowered. Radical leaf roundish-ovate, 

 nerved. Flower large, purplish, somewhat resembling a species 

 of Cypripedium. I have received a specimen of this . beautiful 

 plant from Dr. Holmes, of Montreal, gathered near that place, 

 and I have introduced the species in the hope that it may yet 

 be found in the northern part of our state. 



**** Lateral anthers fertile ; the middle one sterile and peta- 

 loid. 



17. CYPRIPEDIUM. Linn.' 



Lip ventricose, inflated, saccate, obtuse. Column termi- 

 nating in a petaloid lobe. Two under segments of 

 anth united, (or 4 segments with the under one bifid.J 



Gynandria. Diandria. 



1. C. candidum Willd,: stem leafy; leaves oblong-lanceolate; lobe 

 of the style lanceolate, rather obtuse ; lip compressed, shorter than the 

 lanceolate segments of the perianth, 



HAB. Penn. Muhl. May. If. Resembles C. calceolus; but 

 the flowers are white, and not half the size : the form of the 

 leaves and the lobe of the style distinguish it sufficiently. 

 Pursh. White Ladies Slipper. 



2. C. parviflorum Willd. : stem leafy ; lobe of the style triangular, 

 acute ; outer segments of the perianth ovate-oblong, acuminate ; inner 

 ones linear, contorted ; lip compressed, shorter than the perianth. C. 

 calceolus Mich. 



HAB. Woods. N. Y. to Car. May, June. 1. Stem 12 inches 



high, erect. Leaves clasping, oval, nerved. Perianth green, 



spotted with dark purple ; lateral segments linear, twisted, 



iiir - hairy on the side. Lip yellow, spotted. Yellow Ladies Slipper. 



3. C. pubcsccns Sicartz : stem leafy j lobe of the style triangular- ob 



