LADY'S SLIPPER 



137 



coriophora, of Europe and the Orient; O. Simia, of Europe and the 

 Orient; O. militaris, of Europe and Asia; Habernaria conopsea, of 

 Europe and Asia; Aceras anthropophora, of Europe and Arabia. 



CYPRIPEDIUM. Lady's Slipper. The dried rhizome and 

 roots of Cypripedium parviflorum (Smaller Yellow Lady's Slipper) 



FIG. 60. Cypripedium parviflorum pubescens. A, flowering plant; B, rhizome 

 seen from above; C, cross-section of a ieptocentric mestome strand from the 

 rhizome showing parenchyma (p), hadrome (h), and leptome (I). After 

 Holm. 



and x Cypripedium parviflorum pubescens (Larger Yellow Lady's 

 Slipper) (Fam. Orchidacese), perennial herbs (Fig. 60) native in woods 

 and thickets of the Eastern and Central United States and Canada. 

 Description. Rhizome horizontal, somewhat tortuous and bent, 

 3 to 7 cm. long, 2 to 4 mm. in diameter; externally dark brown, annu- 



