316 



Orchidaceae 



Spiranthes 



Map 714 

 Spiranthes lucida (H. H. Eaton) Ames 



0~ —J5 

 Map 715 



Spiranthes ovalis Lindl. 



50 



Map 716 



Spiranthes cernua (L.) Richard 



Flowers about 6, at least more than 5, mm long; spikes stout, mostly about 20 

 mm wide, rarely as narrow as 15 mm; petals linear, not dilated at the base. 



Corolla white; spikes usually blunt; lower bracts shorter than the corolla 



5. S. cernua. 



Corolla yellowish; spikes acute; bracts longer than the corolla. (See excluded 

 species no. 157, p. 1037.) S. cernua var. ochroleuca. 



1. Spiranthes Beckii Lindl. {Ibidium Beckii (Lindl.) House.) BECK 

 Ladies' Tresses. Map 712. I have found this species in only two counties. 

 It grew in hard, clay soil in open white and black oak woods. 



Mass., Md., Ky., southw. to Fla. and Tex. 



2. Spiranthes gracilis (Bigel.) Beck. (Ibidium gracile (Bigel.) House.) 

 Slender Ladies' Tresses. Map 713. This species is, no doubt, sparingly 

 distributed throughout the state. In addition to the counties shown on the 

 map it has been reported from Kosciusko, Noble, and Tippecanoe Counties. 

 My specimens are from sandy or clayey soil in open, white and black oak 

 woods and fallow fields and from sandy, black soil in a prairie habitat. 



P. E. I., Que., Ont. to Man., southw. to Fla. and Tex. 



3. Spiranthes lucida (H. H. Eaton) Ames. {Ibidium plantagineum 

 (Raf.) House.) Wideleaf Ladies' Tresses. Map 714. This species is local 

 in the lake area where it is sparingly found on the springy, marl borders 

 of lakes and in bogs elsewhere. In Jennings County in southern Indiana I 

 found it at the base of a 75-foot cliff along the Muscatatuck River growing 

 on narrow ledges of limestone in soil kept continually wet by seepage. In 

 addition to the counties shown on the map it has been reported from 

 Tippecanoe County. 



Maine, Que., Ont. to Mich., southw. to Va. and Ohio. 



4. Spiranthes ovalis Lindl. (Ibidium ovale (Lindl.) House.) Map 715. 

 This species is very rare throughout its range and I have found it in only 

 two counties. One specimen is from the wooded bluff of the Ohio River 



