140. Orciiidaceae 297 



3. Perianth 4-6 mm long; lip with a median green stripe; rachis 

 twisted; roots usually several; diy open woods, local. July- 

 Sept. Slender Ladies' Tresses [S. lacera Raf., nom. dub.; 



S. bcckii Lindl., nom. illegit.] S. gracilis (Bigel.) Beck 



2. Rachis of inflorescence and usually the upper part of stem 

 pubescent; leaves linear-lanceolate, not distinctly petioled, 

 commonly present at flowering time; perianth 8-10 mm long; 

 lip ovate, yellowish, pubescent beneath, 5-7 mm long; 



Effingham, Menard, and St. C'lair counties. May-Sept 



S. vernalis Engelm. & Gray 



1. Raceme closely flowered, the flowers apparently in 2 or 3 spirals; 

 rachis and upper part of stem puberulent or pubescent. 

 4. Raceme slender, 8-12 mm thick; perianth 3-7 mm long. 



5. Lip white, puberulent, ovate, 4-5 mm long with 2 slender in- 

 curved callosities; Pulaski, Sangamon, and Union counties. 

 Sept. -Oct. [S. montanum Raf., nom. dub.] ....S. oralis Lindl. 

 5. Lip with a median yellow stripe, glabrous, elliptical-quadrate; 

 callosities none or very small; springy bog in wooded pas- 

 ture, near Marley, Will Co., June 22, 1897, Agnes Chase; 

 Hancock Co., Mead in 1844. May- July. Shining Ladies' 

 Tresses \S. latifolia Torr. ; S. plantaginea (Raf.) Torr., non 



Lindl.] S. lucida (H.H.Eaton) Ames 



4. Raceme stout, 1.5-2.5 cm thick; perianth 8-10 mm long; lip 

 white, pubescent; meadows and swamps, occasional. Aug.- 

 Oct. Nodding Ladies' Tresses S. cernua (L.) Rich. 



8. Goodyera R.Br. — Rattlesnake-plantain 



G. pubescens (Willd. ) R.Br. Woods, rare; chiefly in n. and s.e. 111. 

 July-Sept. 



9. Malaxis Soland. ex Sw. — Adders-mouth Orchid 

 M. unijolia Michx. Woods, rare; Hancock, Henderson, Kane, 

 and Menard counties. May-Aug. 



10. Liparis Rich. 

 1. Flowers few, greenish; lip about 5 mm long, shorter than the 



petals; capsules ellipsoid, about twice the length of the pedicels; 



wet ground in the n. half of the state, rare. June-July 



L. loeselii (L.) Rich. 



1. Flowers numerous, purple; lip 10-12 mm long, about eciualling the 



petals; capsules clavate, equalling or .shorter than the pedicels; 



woods, not common. June-July L. lilifolia (L.) Rich. 



1 1 . Epipactis Sw. — Helleborine 

 E. helleborine (L.) Crantz. Moist woods near Barrington, Lake 

 Co., /. A. Steyermark 76351 ; nati\e of Eur. 



12. Aplectrum Nutt. — Puttyroot 

 A. hyemale (Muhl.) Torr. Rich woods, occasional. May- June. 



