338 



Orchidaceae 



Cypripedium 



Miles 



5 50 



Map 690 



Cypripedium parviflorum Saii'sb. 



50 



n Map 691 

 Sedium parviflorum 



var. pubescens (Willd.) Knight 



30 



Map 692 



Cypripedium acaule Ait. 



specimens have influenced some authors to regard it as a nutritional form. 

 Some claim that when the large-flowered form is transplanted it will 

 change in time to the small-flowered form. This transition is contradicted 

 by the experience of others. Until it is proven that the one is merely a 

 passing form of the other it is best to regard them as distinct with inter- 

 grading forms. In Indiana the habitat seems to distinguish them. The 

 variety grows in deep leaf mold in moist or dry woods while the typical 

 form grows for the most part in very wet or boggy places. The habitat dis- 

 tinction, however, does not hold even for the few specimens I have. All of 

 my specimens of the typical form grew in boggy places except one which 

 grew in woodland. All of my specimens of the variety grew in woodland 

 except one that grew in a tamarack bog. 



Que. to B. C, southw. to N. C, Ala., Mo., and N. Mex. 



Since the preceding was written, Donovan S. Correll has published his 

 study of the North American yellow ladyslippers in Bot. Mus. Leafl. of 

 Harvard University 7: 1-18. 1938. He concludes that our plants are a 

 variety of the yellow ladyslipper of Eurasia and assigns to them the name 

 Cypripedium Calceolus war. pubescens (Willd.) Correll. He gives the range 

 of the variety as Newf., Que. to Yukon and B. C, southw. to S. C, Ga., 

 Miss., La., N. Mex. and Wash. 



4. Cypripedium acaule Ait. (Fissipes acaulis (Ait.) Small.) Pink 

 Ladyslipper. Map 692. This species is found only in the sphagnum bogs 

 of northern Indiana. In addition to the counties shown on the map it has 

 been reported from Lake County. Its habitat occurs in all of these counties 

 and also did occur in Marshall and Starke Counties, but the report from 

 Monroe County by Andrews must be an error. It was formerly a common 

 plant and showed great variation in the size and shape of its leaves. Since 

 its habitat is restricted, and our sphagnum bogs are fast disappearing, it 

 will soon become rare in our state. 



Newf. to Winnipeg and Minn., southw. to N. J., Ohio, and Ind., and in 

 the mts. to N. C. and Tenn. 



