Illustrations xv 



PAGB 



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 spedabilis) * . . . . 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 {Habetiaria 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 aud 



Habenaria psycodes) 252 



The Small Bog Orchis {Habetiaria clavellata) . . . 254 

 Andrews' Rose-Purple Orchis (//tzd^war/a y4«fi?r^ze'5«V) . 258 

 The Beautiful Arethusa {Arethusa bnlbosa) . . . 262 

 Showing the structural parts of the flower, 



the single leaf, aud bulbous root. 

 Colored 

 The Hooded Ladies' Tresses {Gyrostachys Romanzoffiana) 264 

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

 The Slender Ladies' Tresses {Gyrostachys gracilis) . . 268 

 The Haunts of the Rattlesnake Plantain {Peramium) 

 amid the Pines and Spruces of the Domelet, Pownal, 



Vermont 270 



The Green Adder's-Mouth {Achroayithes uni/olia) . . 272 

 The Large Tway blade (Zff/z'crf///^ ///n/f/iaj ' . . . 274 

 Northern Calypso {Calypso bulbosa) ..... 276 

 From lithograph in Meehan's Native Flowers 

 and Ferns of the United States, i : 1878. 

 By permission. 

 Colored 



