104 FLORA OP THE UPPER SUSQUEHANNA. 



LISTERA R. Br. 



L. cordata (L.) R. Br. Twayblade. Peatbog, one mile south 

 of Ludlow Pond, town of SmithviUe, Coville. Unadilla Forks; 

 rare. Brown. 



GYROSTACHYS Pers. 



G. cernua (L.) Kuntze. Nodding Ladies' Tresses. Common 

 in damp, open places. Flowers in spikes, cream- white, sweet 

 scented. Aug., Sept. {Spiranthes cernua Richard.) 



G. gracilis (Bigel.) Kuntze. Slender Ladies' Tresses. Less 

 common than the preceding. Found on hillsides and in dry, 

 open woods. Flowers white, fragrant, in a twisted spike. 

 ( spiranthes gracilis Bigelow.) 



PERAMIUM Salisb. 



P. repens (L.) Salisb. Small Rattlesnake Plantain. Some- 

 what rare. Found in rich, .shady woods. Flowers in a loose, 

 one-sided spike. ( Goody era repens R. Br. ) 



P. pubescens (Willd.) C. C. Curtis. Common Rattlesnake 

 Plantain. Common in rich woods, usually under evergreens. 

 Plants commonly forming little colonies. Leaves veined with 

 white; flowers not in a one-sided spike. Aug. ( Goody era pu- 

 bescens R. Br.) 



LIMODORUM L. 



L. tuberosum L. Grass Pink. Calopogon. Somewhat rare. 

 Not uncommon in suitable places in the eastern part of our 

 range. Not noted from Broome county west, except in bogs 

 north of Barton {Fenno). Reported from Mutton-Hill pond, 

 by Millspaugh in 1885. Does not occur there now. Found in 

 sphagnum bogs. Stem from a small, solid bulb; leaves grass- 

 like; flowers large, three or more, pink-purple. A beautiful 

 orchid. June, July. {Calopogon pulchellus R.Br.) 



POGONIA Juss. 



P. ophioglossoides (L.) Ker. Rose Po(;onia. More common 

 than the preceding with which it is nearly always associated. 

 Confined to the eastern ])art of our range. Bog near Jarvis 

 street, Binghamton — the only station in Broome county, Clute. 



