520 GYNANDRIA.— MONANDRIA. 



1 , NEOTTIA. Ladies' tresses. Orchideit. 



1 . N. tortilis : radical leaves linear ; scape sheathed ,: 



flowers spirally secund ; lip somewhat 3-lobed ; 

 the middle lobe larger and crenulate. 



HAB. Meadows and woods. July. U . Scape 

 slend., 12 in. high; fi. num., wh. ; root fascic. 

 B. gracilis : radical leaves ovate, caducous, membra- 

 naceous. 



HAB. Dry woods. Scape very slend., smooth. 



2. N. cernua : leaves linear-lanceolate, nerved ; stem 



sheathed ; spike densely flowered ; flowers re- 

 curved-drooping ; lip oblong, entire, acute. 



HAB. Boggy grounds. Aug. — Oct. tt . Stem 8— 

 12 in. high,pubes. above ; fl. gr.-wh. 

 &. major : stem tall, somewhat leafy ; flowers very 

 large. 



HAB. Woods. Sept. Stem 2 ft. high ; Jl. 3 timto 

 ens large as in the common variety. 

 y? latifolia: stem short; leaves oblong-lanceolate, 

 subradical, flat. 



HAB. Mountain meadows. Stem 4 — 8 in. high ; 

 leav. broad ; lip ovate, obtuse. 



512. LISTERA. Tway-blade. Orchideai. 



1. L. cor data : stem with only 2 opposite roundish- 

 cordate ; raceme loose ; column without any ap- 

 pendage behind ; lip elongate, 2-toothed at base, 

 deeply bifid ; the segments subdivaricate and 

 acute. 

 JIAB. Sphagnous swamps. May. U. Stem 4— - 

 8 in. high; raceme 7 — \b-Jl. ;fl. minute, gr.-purp. 



J. L ? convallarioides : stem with only 2 opposite oval- 

 roundish leaves, pubescent above ; raceme few- 

 flowered (4 — 6) ; column porrected ; lip oblong, 

 dilated, and obtusely 2-lobed at the extremity. 

 I JAB. Swamps. U. Stem 6 in. high, slend. ; Jl. 

 much larger than in No. 1. 



513. POGONIA. Orchidece. 

 1 . 1*. ophioglossoides : root fibrous ; scape furnished 



