268 Bog-Trotting for Orchids 



I.— LISTERA CONVALLARIOIDES (Swartz) Torrey, 1800- 

 1826' 



Broad-Lipped Twaybi^ade; 



The specific name, convallarioides, refers probably to a sup- 

 posed resemblance of this species to Convallaria^ the Lily-of- 

 t he- Valley. 



Small woodland orchid, with fleshy-fibrous roots. June 9th- 

 August 17th. 



Flowers purplish-yellow, 3-15 spurless, subtended by acute 

 bracts, X~K inch long. Labellum wedge-shaped, broader than 

 sepals or petals, produced into 2 distinct lobes at the apex, 

 notched in center, ornamented with tooth at the base. Sepals 

 and petals linear-lanceolate. Stem 4-10 inches high. Leaves 

 2, nearly orbicular in the middle of stem, opposite, smooth, 

 obtuse at the apex, 3-9 nerved. 



Continental Range — From the wooded coast Unalaska, 

 southward throughout the Canadian provinces, to North Caro- 

 lina ; westward to the fir- forests of Idaho, Washington, 

 Wyoming, Sierra Nevada Mountains, and the Bay region of 

 California. 



New England Range — Maine, common ; New Hampshire, 

 frequent ; Vermont, infrequent; Massachusetts, doubtfully re- 

 ported. 



2.— LISTERA AURICULATA Wiegand, 1899' 



AURIClyED TWAYBLADE 



The specific name, auriculata, from auriculum, ear, refers to 

 the auricled base of the labellum and leaves of this species. 



Small cedar swamp orchid, with fibrous roots. July. 



Flowers, many in slender raceme. Labellum slightly ciliate, 

 oblong, broadest at the auricled base, cleft X-K its length. 

 Sepals lanceolate ; petals oblong-linear, longer than the ovary, 

 spreading, obtuse. Stem 4-7 inches high, slender. Leaves 

 large, oval, or elliptic-ovate, borne above the middle of the 

 stem. 



Continental Range — From Quebec, southward to Maine and 

 New Hampshire. 



New England Range — Maine, rare ; New Hampshire, rare. 



' Species not reported for Hoosac Valley region, although 

 native of Vermont. 



' Species not reported for Hoosac Valley region, although 

 native of northern New England. 



