194 GEOLOGY OF OHIO. 



478. LISTERA R. Brown. Twayblade. 



LlSTERA CORDATA (I/.) R. Brown. 



"Eastern and Northern, O.," J. S. Newberry (Cat.) 



479. GYROSTACHYS Pers. ( Spiranthes Richard) . Ladies' Tresses. 



GyrosTachys cernua (L.) Kuntze. (Spiranthes cernua (L.) Richard.) 

 Generally distributed. 



Gyrostachys gracilis (Bigel.) Kuntze. ( Spiranthes gracilis Bigelow.) 



" General," J. S. Newberry ( Cat.) ; Painesville, Wm. C. Werner ; Licking Co., 

 H. L. Jones ( Cat.) ; Adams and Hocking counties, W. A. Kellerman ; Cincin- 

 nati, Jos. P. James (Cat.) 



Gyrostachys latieolia (Torr.) Kuntze. (Spiranthes lati folia Torr.) 



"Northern O.," J. S. Newberry (Cat.); Painesville, Wm. C. Werner; Columbus, 

 E. E. Bogue ; Miami Valley, A. P. Morgan (Flora). 



480. PERAMIUM Salisb. ( Goodyera R. Br.) Rattlesnake Plantain. 



PERAMIUM pubESCens (Willd.) (Goodyera pubescens R. Br.) 

 In rich woods throughout the state, infrequent. 



PERAMIUM repEns (L.) Salisb. (Goodyera repens R. Br.) 



" General," J. S. Newberry (Cat.) ; Licking Co., H. L.Jones (Cat.) 



481. ARETHUSA Gronov. 



Arethusa bulbosa L. 



Lorain Co., A. A. Wright (Cat.) ; Licking Co., H. L. Jones (Cat.) 



482. LIMODORUM ( Calopogon R. Br.) 



Limodorum Tuberosum L. ( Calopogon pulchellus R. Br.) 



Geauga Lake, W. Krebs; Lorain ' Co., A. A. Wright (Cat.); Painesville, W. C. 

 Werner; Licking Co., H. L.Jones (Cat.) 



483. POGONIAJuss. 



Pogonia Trianthophora (Sw.) B. S. P. (P. pendula Lindl.) 

 Scarce but distributed throughout the state. 



Pogonia ophioglossoides (L.) Ker. 



Lorain Co., A. A. Wright (Cat.) ; Licking Co., H. L. Jones (Cat.) 



Pogonia verticillata (Willd.) Nutt. 



Painesville, H. C. Beardslee (Cat.) ; Fairfield Co., S. Renshaw. 



484. ORCHIS L. 



