LIST OF ILL\JSTRATI01<iS— Continued 



PLATE FACING PAGE 



XXIV. ^Vhite Fringed Orchis 56 



57 

 60 

 61 

 64 



65 



72 



73 

 74 



75 

 80 

 81 

 88 

 94 



95 

 98 



99 

 102 

 106 

 no 

 III 

 116 

 117 

 122 

 126 

 127 

 130 

 131 



XX\'. Blossoms of Fringed Orchis 



XXVI. Smaller Purple Fringed Orchis 



XX\'II. Fringeless Purple Orchis 



XXWII. Blossoms of Rose Pogonia 



XXIX. Rose Pogonia 



XXX. Nodding Pogonia 



XXXI. Spreading Pogonia . 



XXXII. Whorled Pogonia . 



XXXIII. SmaUer Whorled Pogonia 



XXXIV; Arethusa .... 



XXX\^ HeUeborine 



XXX\1. Gyrostachys 



XXXMI. Hooded Lady's-Tresses . 



XXXVIII. Wide-leaved Lady's-Tresses 



XXXIX. Nodding Lady's-Tresses . 



XL. Grass-leaved Lady's-Tresses 



XLI. Slender Lady's-Tresses; Little Lady's-Tresses 



XLII. Typical Flower of the Genus Listera 



XLIII. Broad-lipped, Heart-leaved, and Southern Twayblade 



XLIV. Rattlesnake Plantain 



XLV. Lesser Rattlesnake Plantain 



XL\T. Downy Rattlesnake Plantain 



XL\TI. Adder's-mouth 



XL VIII. Large Twayblade 



XLIX. Loesel's Twayblade 



L. Cah-pso .... 



LI. Corallorhiza 



