Appendix 267 



Flowers white, very fragrant, }{i-}4 inch long, in a slender 

 spiked raceme, 1-3 inches long, y^-^i inch thick, loose, usually 

 much twisted. Labellum white on margins, thick and greenish 

 in middle, ^^ inch long, clawed at the base, crenulate at the 

 apex. Stem 8-24 inches high, slender, grass-like. Leaves 3 

 obovate, sometimes nearly orbicular, basal, dying away at or 

 before flowering season. 



Continental Range — From Nova Scotia, southward through- 

 out Canada, and New England, to Florida ; westward to Min- 

 nesota, and Texas. 



New England Range — Maine, common ; New Hampshire, 

 very common ; Vermont, common ; Massachusetts, common ; 

 Rhode Island, very common ; Connecticut, common. 



VII 



Listera 



R. Brown, 1813 ' 



Lister'.^ Tvyayblade 



The generic name, Listera, is in honor of Martin L,ister, 1638 

 (?)-i7i2, a correspondent of Ray. 



Small orchids with fleshy-fibrous roots. Anther, i. Label- 

 lum 2-cleft, longer than petals. Sepals and petals nearly alike. 

 Flowers in terminal raceme, spurless. Anther erect, joined to 

 column, without a lid. Pollinia, 2, united to gland, powdery. 

 Stem 3-T0 inches high. Leaves, 2, opposite, near the middle 

 of the stem, 1-2 scales below. 



Continental Range — In moist woodlands and boglands from 

 Alaska, southward to Florida ; westward to the Pacific coast. 

 There are 12 species or more belonging to the north temperate 

 zone which are closely related to species of Gyrostachys and 

 Peramimn, save in the herbaceous foliage. 



North American species north of Mexico 8 



New England species 3 



Hoosac Valley species 1-2 



New England species : 



1. L. convallarioides (Swartz) Torrey, 1800-1826. 



2. L. auriculata Wiegand, 1899. 



3. L. cordata (Linnaeus) R. Brown, 1753-1813. 



' Genus doubtfully reported for Hoosac Valley region, al- 

 though native of Vermont. 



