POGONIA 



69 



Of the thirty species of Pogonia, widely distributed over the 

 world, only the following five are found in North America: 



KEY TO THE SPECIES OF POGONIA 



Sepals and petals nearly equal and 

 alike. 



Lip crested and fringed, flowers 



rose colour, solitary or in pairs. I. Rose Pogonia. 



Lip not crested, several pale 

 purple flowers on drooping 

 flower stalks. 



Sepals longer and narrower than the 

 petals. 



Stem with single leaf near the 

 middle, and bract near the 

 flower ; flesh-coloured petals 

 with purple-veined crested lip. 



Stem with whorl of five leaves at 



the summit. 



Sepals one and one-half to two 

 inches long, wide spreading, 

 dark purple. Flower soli- 

 tary, greenish yellow. 



Sepals only a trifle longer than 

 petals, two or sometimes 

 one flower above whorl of 

 leaves. 



2. Nodding Pogonia. 



3. Spreading Pogonia. 



4. Whorled Pogonia. 



5. Small Whorled Pogonia. 



I. ROSE POGONIA, OR SNAKE-MOUTH 



Pogonia ophioglossoides (L.) Ker. (Plate XXIX.) 



The Rose Pogonia is a slender plant, springing from 

 a. fibrous root. It grows about a foot in height, with two 

 or three leaves and a single flower that smells, some say» 



