96 ORCHIDACEAE 



Mo.— Pennsylvania : Monroe; Carbon; Susquehanna; Wayne; 

 Tioga ; Huntingdon ; Northampton ; Dei<aware ; Erie ; Mont- 

 gomery ; Lancaster ; Lackawanna ; Pike ; Chester. 



13. ISOTRIA Raf. 

 Lip crested along a narrow line above the face : pedicel as long as the capsule 

 or longer. i. I. verlicillata. 



Lip crested over the face and lobes : pedicel shorter than the capsule. 



2. /. affinis. 



1. Isotiia verticellata (Willd.) Raf. Whorled Pogonia. (Man. p. 

 297 ; I. F. /. III.) In moist woods, Ont. to Wis., Ind. and Fla. — Penn- 

 sylvania : Northampton ; Chester ; Lancaster ; Lebanon ; Schuyv 

 KiLi, ; Huntingdon ; Centre ; Montgomery ; Somerset ; Dela- 

 ware ; Al,I,EGHENY. 



2. Isotria affiais (Austin) Rydb. Smai,i,er Whorled Pogonia. 

 (Man. p. 297 ; L F. /. /118.) In moist woods, Conn., Pa. and N.J. — 

 Pennsylvania : Monroe, Water Gap ; Berks ; Philadelphia. 



14. POGONLA. Juss. 

 1. Pogonia optaioglossoides (L.) Ker. Rose Pogonia. (Man. p. 297 ; 

 I. F. /. /114.) In meadows and swamps, Newfoundland to Ont., Fla. 

 and Kans. Also in Japan. — Pennsylvania : Tioga ; Luzerne ; Monroe ; 

 Northampton; Bucks; Chester; Erie, Saunders; Montgomery; 

 Lancaster ; Berks ; Lackawanna ; Pike ; Delaware. 



15. TRIPHORA Nutt. 

 1. Tiiphora trianthophora (Sw.) Rydb. Nodding Pogonia. (Man. 

 p. 298 ; I. F. /. riis-) In "ch woods, Ont. (?) to R. I. Fla., Wis. and 

 Kans.— Pennsylvania : Bucks ; Philadelphia ; Lehigh ; Lancaster ; 

 Northampton ; Chester ; Delaware. 



16. ARETHUSA L. 



1. Arethusa bulbosa L. Arethusa. (Man. p. 298; I. F. /. ///o.) 

 In bogs, Newfoundland to Minn., N. C. and Ind. — Pennsylvania: 

 Wayne ; Chester ; Lancaster. 



17. ACHROANTHES Raf. 

 Lip entire at the acute apex. 1.. A. monophylla. 



Lip 3-toothed at the broad apex. 2. A. uni/olia. 



1. Achroantbes monophylla (L. ) Greene. White Adder's-mouth. 

 (Man. p. 303 ; I. F./. 11134.) In woods, Quebec to Minn., Pa. and Neb. 

 —Pennsylvania : Wayne ; Centre ; Susquehanna. 



2. Aohroanthes unifoUa (Michx.) Greene. Green Adder'S-mouTh. 

 (Man. p. 303; I. F. /. i/js.) In woods and thickets, Newf to Minn., 

 Fla., Ala. and M.O.— Pennsylvania : Wayne ; Monroe ; Lackawanna ; 

 Philadelphia ; Lancaster ; Franklin ; Huntingdon ; Armstrong ; 

 Centre ; Mifflin ; Delaware. 



