340 THE KINDS OF PLANTS 



very unlike the others, usually larger and frequently lobed, spurred, 

 or saccate: stamens 1 or 2 fertile, variously coherent with the style 

 or with a thick, fleshy stigma, all together forming the column: pollen 

 in waxy or powdery masses: ovary inferior. About 5,000 species 

 and over 400 genera, of wide distribution but most abundant in the 

 tropics; species rather difficult to determine, and therefore not de- 

 scribed here in detail. Ours usually found in cool, damp woods, bogs, 

 and meadows. Some of the rarest of greenhouse plants, and often very 

 difficult to grow, are members of this family. 



A. Lip sac-like or inflated, larger than the other parts. 

 B. Anthers 2, one on each side of the style: a spread- 

 ing sterile stamen over the summit of the style: 



flowers generally large and drooping 1. Cypripedium 



AA. Lip not saccate, but spurred, and sometimes fringed: 

 flowers in a terminal spike. 



B. Sepals more or less spreading 2. Habenaria 



BB. Sepals and petals somewhat arching together 3. Orchis 



AAA. Lip not noticeably saccate or spurred. 



B. Flowers in spikes, appearing more or less twisted 

 about the spike, in 1 or several rows: flowers small. 



c. Leaves not variegated 4. Spiranthes 



cc. Leaves variegated with white veins 5. Epipactis 



BB. Flowers 1 to several, in a spike-like loose raceme: 



or terminal on a leaf-bearing stem. 

 A. Stem (scape) from one grass-like leaf: lip crested 



with colored hairs 6. Calopogon 



cc. Stem 1-3-leaved 7. Pogonia 



1. CYPRIPEDIUM. LADY'S SLIPPER. MOCCASIN FLOWER. 



Distinguished by having 2 fertile anthers: pollen sticky, as though var- 

 nished on surface, powdery beneath: lip a large, inflated, spurless sac, 

 toward which the column bends: leaves large, broad, many-nerved: flowers 

 large, showy. Fig. 250. 



C. hirsutum, Mill. Stem leafy, 1-2 ft., or more: flower solitary or 

 2 or 3 together; lip a globular sac, white, colored with purplish-pink, lMs-2 

 in. long. In swamps, bogs and woods, North, and South in mountains. June 

 to September. One of our rare and beautiful wild flowers. 



C. acaule, Ait. Scape 1 ft. tall, with two leaves at base, 1 -flowered: 

 sepals greenish purple, spreading; lip pink, veined with rose-purple, about 

 2 in. long, fragrant, split down the front, but edges closed. Woods and 

 bogs. May to June. Fig. 250. 



C. pubescens, Willd. Stem slender, leafy, 1-2 ft., usually clustered, 

 1- to several-flowered: flowers yellow, lip much inflated, with purplish stripes 

 or spots, 1^-2 In. long. Low woods, meadows. May to July. 



C. parvifldrum, Salisb. Stem 1-2 ft. high, leafy, 1- to several-flowered: 



