long, dark-purple sepals and oval, greenish-yellow petals. 

 This appears in May or June. 



These four varieties range east of the Mississippi. 



SMALLER WHORLED POGONIA, P. affinis, is similar, but 

 smaller, frequently with two greenish-yellow flowers, with 

 equal sepals and petals. It is a rare local plant, bloom- 

 ing in June in Connecticut, New York, and New Jersey. 



PLATE XVIII, A 



LONG-BRACTED ORCHIS, Hobenaria bracteata. Root. 

 Fibrous. Stem. Simple, 6' -2 high. Leaves. 

 Lanceolate or oval, alternate, turning to long bracts be- 

 neath each flower. Flowers (a). Small, greenish, in a 

 loose-flowered, terminal raceme. Perianth. With oval 

 spreading sepals and narrow petals. A much longer lip, 

 with a small spur. Column (b). With two anthers (s) 

 above the stigma (p). 



None of the green orchids are showy. This is one of 

 the least insignificant. It grows in woods and meadows 

 from New Brunswick to the Rockies and south to North 

 Carolina. We find it all summer. 



PLATE XVIII, B 



TALL LEAFY GREEN ORCHIS, H. hyperborea. Root. 

 Fibrous. Stem. Simple, 8'-3 high. Leaves. Lan- 

 ceolate, alternate. Flowers (d). Small, in a terminal 

 raceme, yellowish-green Perianth. With ovate sepals 

 and petals, and a lanceolate lip, with a spur of the same 

 length. Column. Anthers above the stigma. 



This little orchid grows across the continent, north from 

 New Jersey, Colorado and Oregon, from May to August. 

 I found it in the Yellowstone Park. 



PLATE XVIII, C 



INTERMEDIATE BOG ORCHIS, H. media. Root. 

 Fleshy. Stem. Simple. Leaves. Lanceolate, acute. 

 Flowers (c). Small, in a densely flowered terminal 

 raceme, greenish or purplish. Perianth. Like the last, 

 only the spur is much longer than the lip. Column. 

 As above. 



This orchid resembles H. hyperborea. It ranges from 



18 



