Illustrations xv 



PAOB 



The Pink Moccasin- Flower — the Stemless Lady's Slipper 



{Cypripedium acaule) * 246 



Showing the structure of the pendulous and 

 bilobed labellum, and the processes of 

 the sepals and petals. 

 Colored 

 The Showy Orchis (Orchis spedadilis) * .... 248 

 The first orchid of the season, showing the 

 hooded fold above the orifice of the spur, 

 and the processes of the flowers on the 

 bracted scape. 

 Colored 

 A Group of Three Species of Genus Habenaria : i. The 

 Tall Northern Green Orchis {Habenaria hyperborea) ; 

 2. The Tall Northern White Orchis {Habenaria dila- 

 tata) ; 3. The Large Round-Leaved Orchis {Habenaria 



orbiculata)* 250 



Colored 

 The Spikes of Habenaria {Habenaria Andrewseii and 



Habenaria psycodes) 252 



254 

 258 

 262 



The Small Bog Orchis {Habenaria clavellata) . 

 Andrews' Rose-Purple Orchis {Habenaria Andrewseii ) 

 The Beautiful Arethusa {Arethusa bulbosa) 



Showing the structural parts of the flowerj 

 the single leaf, and bulbous root. 



Colored 

 The Hooded Ladies' Tresses {Gyrostachys Romanzoffiana) 264 

 The Nodding Ladies' Tresses {Gyrostachys cernua) . . 266 



The Slender Ladies' Tresses {Gyrostachys gracilis) . 

 The Haunts of the Rattlesnake Plantain {Peramium) 

 amid the Pines and Spruces of the Domelet, Pownal 



Vermont 



The Green Adder's-Mouth {Achroanthes unifolia) 

 The Large Tway blade {Leptorchis liliifolia) 

 Northern Calypso [Calypso bulbosa) .... 



From lithograph in Meehan's Native Flowers 

 and Ferns of the United States, 1 : 1878 

 By permission. 

 Colored 



268 



270 



272 

 274 

 276 



