164 WiEGAxn: A Revision of the Gexus Listera 



IJstcra cordata Torr. Fl. N. U. S., Liiidlc}', Gen', ct Sp. 

 Orchid. Hook. FI. Bor. Am. Fcdcbour, Flora Ros. Blume, 

 Orchid. Arch. Ind. 



Stem very slender ([o-i8, rarel\- 28 cm. high), glabrous be- 

 low, glandular-pubescent just above the leaves but the raceme 



cr 



labrous; leaves of medium size (12-25 mm. long), inserted at 

 the middle of the stem, broadl}' ovate, truncate at the base but 

 abruptly contracted at the point of insertion, mucronate : raceme 

 many-flowered, rather dense, ver}' long peduncled : bracts minute 



(•5 



flowers very small, on short 



but slender (2-3 mm. long) ascending, glabrous pedicels which are 

 several times longer than the bract but shorter than the ovary : 

 the broadly ovate sepals and broadl)- oblong petals both shorter 

 than the ovary (.5 length of the lip), spreading, obtuse : lip very 

 small (4. 5 mm. long), narrowly oblong, 3 -nerved, cleft slightly over 

 halfway down into two linear acute erect lobes, no tooth in the 

 sinus, midrib not excurrent, on each side near the base a long- 

 spreading sulcate subulate papillose tooth (1.5 mm. long), between 

 them a heavy fold : column very short, almost none. 



Mossy woods and swamps, Labrador to New Jersej', westward 

 to Michigan, Colorado, and California, northward to the Arctic 

 coast; also in Greenland, Iceland, central and northern Europe 

 and Japan (Blume). 



The most widely distributed of all the species, but the speci- 

 mens throughout thi.i \ast range are remarkably constant, and 

 differ from each other only in size. A specimen in the Torrey 

 herbarium is labeled as having been collected by Gray and Carey in 

 the mountains of Virginia and South Carolina, July, 1841. The 



writer has seen no other specimen from farther south than New 

 Jersey. 



Specimens examined from Labrador (Hale), Newfoundland, 

 Maine, New Hampshire, Vermont, New Jersc}' (Carey), Rhode 

 Island, New York, Michigan, Colorado, Idaho, California, Oregon, 

 Washington, l^ritish Columbia, Alaska, Greenland, Iceland. Ya\^- 

 land, Lapland, Germany, France, Scandinavia, Switzerland. 



4. Listera au.stkali.s Lindlcy, Gen. et Sp. Orchid. 456. 1840. 



Listera cordafa l\uii. Gen. U. S. PI. 2 : 191. 18 18. 

 Listera convallarioides Ell. Sketch, 2 : 494. 1824. 



Stem slender (12-22 cm. high), glabrous below, slightly red- 

 glandular above the leaves ; the latter inserted at or above the mid- 



