two from near the base of the stem, obovate, clammy. 

 Flowers. Showy, in a 3-6 flowered, terminal raceme, 

 violet-purple, pink and white. Perianth. Sepals joined 

 in an arch, petals beneath, lip whitish and spurred. 

 Column. Violet at the back, with the stigma between 

 the two anthers. 



This is the earliest of the orchids. It grows in rich 

 woods in the eastern half of the continent. 



SMALL ROUND-LEAVED ORCHIS, O. rotundijolia, is 

 more slender, with smaller rose-colored and white flowers 

 and one oval leaf. It blooms in early summer, in the 

 damp woods of Canada and the Northern States. 



WHITE ADDER'S MOUTH, Achroanthes monophylla, and 

 GREEN ADDER'S MOUTH, A. uni folia, are two small 

 orchids with insignificant flowers and one roundish leaf. 

 They bloom in woods in July. Usually the first in the 

 North, the second in the South also. 



PLATE XVII 



ROSE POGONIA, SNAKE-MOUTH, Pogonia ophioglos- 

 soidts. Root. Branching. Stem. Simple, 8'-i 5' high 

 Leaves. 1-2, pale, lanceolate, erect. Flowers. Large, 

 solitary or in pairs, terminal, nodding, having a leaf-like 

 bract beneath, pale rose-pink. Perianth. With oval, 

 equal sepals and petals. The lip fringed, crested, and 

 streaked with yellow and purple. Column (.4 and B). 

 Club-shaped, with a lid-like anther (a) capping the 

 stigma (s). Ovary (o). 



A dainty, fragrant flower growing in swamps and 

 meadows with the wild Cranberry and the Calopogon. 

 It blooms in June or July. 



SPREADING POGONIA, P. divaricata, is somewhat the 

 same, but larger; the sepals are linear and dark-colored 

 and longer than the flesh-colored, lanceolate petals. We 

 find it in swamps in July. 



NODDING POGONIA, P. trianthophora, is smaller, with 

 little, ovate, alternate leaves and pale-purple, drooping, 

 axillary flowers. It appears in late summer. 



WHORLED POGONIA, P. verticillata, bears its leaves in 

 a whorl, above which is the drooping flower, with its 



