MONOCOTYLEDONS 



427 



ORCHIDACEAE (ORCHID FAMILY) 

 CYPRIPEDIUM (LADY'S-SLIPPER, OR MOCCASIN FLOWER) 



Habitat and habit. The flowers of the lady's-slipper belong to 

 the orchid family (the flowers of which are famous for their great 



Courtesy of the American Magazine of Forestry, Washington, B.C. 



FIG. 272. The yellow lady's-slipper 

 (Cypripedium pubescens) 



Photograph by Dr. R. W. Shufeldt 



FIG. 273. The pink lady's-slipper 

 (Cypripedium acaule) 



Photograph by Dr. R. W. Shufeldt 



beauty as conservatory plants) and are biologically interesting 

 on account of their wonderful mechanisms for securing cross- 

 pollination by means of insects. The plants inhabit moist, shady 

 woods with soil containing plenty of humus, or, in the case of 

 some species, low, marshy regions along streams, ponds, and 

 lakes. Their habit is sufficiently illustrated in the text figures 



