Cypripedium Orchidaceae 337 



20 mm long, rarely up to 25 mm long; dried plants mostly 25-35 cm long 



2. C. candidum. 



Leaves 4 or 5, rarely only 3, not overlapping at the base or only rarely so, usually 

 broadly oval to narrowly elliptic; lip yellow outside, generally 2-4.5 cm long- 

 in dried specimens, sometimes only 1.5 cm long in depauperate specimens; 

 plants of dry woods or of boggy and springy places. 

 Lip 2-3 cm long; sepals of a madder purple color; flowers very fragrant; leaves 



3 or 4 3. C. parviflomm. 



Lip 3-5 cm long; sepals of a greenish yellow color, streaked with fine lines of 

 madder purple; less fragrant than the preceding; leaves larger, 4 or 5, rarely 



6 3a. C. parviflomm var. pubescens. 



Plants without stems, with 2 opposite basal leaves, rarely a third near the base of the 

 scape; leaves very variable in width and length, oval to narrowly elliptic; flowers 

 pinkish (white in albino forms); lip usually 4-7 cm long in dried specimens; gen- 

 erally found only in tussocks of sphagnum in Indiana 4. C. acaide. 



1. Cypripedium reginae Walt. (Cypripedium hirsutum Mill.) Showy 

 Ladyslipper. Map 688. This orchid was formerly rather frequent in its 

 habitat in our northern counties, but now like the other species of the genus 

 has become rare on account of drainage and grazing. It prefers a wet, cold 

 soil and is usually found in muck in springy places or in peat in tamarack 

 bogs, often in tussocks of sphagnum. In optimum conditions it reaches 

 a height of 3 feet and I once measured a leaf that was nearly 7 inches wide 

 and 1 foot long. I found it to be a common plant in a large springy area at 

 the base of the high bank along Sugar Creek in Montgomery County. R. C. 

 Friesner found a few plants in a marly springy area on the slope of the 

 high bank of Flint Creek about 3 miles northwest of Westpoint, Tippe- 

 canoe County and gave me a specimen. It has been reported also from 

 Hamilton, Kosciusko, Marshall, Noble, and St. Joseph Counties. 



Newf. to Minn., southw. to Ga. and Mo. 



2. Cypripedium candidum Muhl. White Ladyslipper. Map 689. This 

 species is very local and I now know of only six places in the state where it 

 occurs. There are no reports for it in Indiana outside of the range indi- 

 cated on the map except that Schneck in 1876 reported it as occurring in 

 the Lower Wabash Valley, saying: "Rapidly disappearing, once common 

 here." I was informed by a reliable authority that it has been found in 

 two places on springy banks in Tippecanoe County. It is generally found 

 on "raised springy areas" and usually associated with Zizia aurea. It 

 occurs in Porter County in a cattail mucky area. 



N. Y. to s. Minn., southw. to N. J., Ky., and Mo. 



3. Cypripedium parviflorum Salisb. Small Yellow Ladyslipper. Map 

 690. Since Indiana has been so completely drained the typical form of this 

 species has become very rare. It is generally found in boggy places and in 

 the dunes on the wet borders of sloughs. It is rarely found in woodland. 



Newf. to Que., Man., Sask., to B. C, southw. to Ga., Ohio, 111., Iowa, 

 and Wash. 



3a. Cypripedium parviflorum var. pubescens (Willd.) Knight. Large 

 Yellow Ladyslipper. Map 691. The large-flowered variety seems to be 

 quite distinct from the typical form for the most part but intergrading 



