ORCHIDACE^ 



in this species. Root system deep, distinct. Waterford, Mrs. F. S. But- 

 ton, 1913. Small clearing in rich woods with Cypripedium acaule; Brown's 

 Meadow, Miss Florence Griswold, June 1, 1913. 



NEW YORK 



Long Island, Hempstead, Miss Harriet Mulford, May 25, 1918. 



NEW JERSEY 



Closter, C. F. Austin, 1858. This station exterminated by 1873. Re- 

 ported from Norwood and Trenton. 



PENNSYLVANIA 



Westtown, Edith Cheney, June 1, 1887. Reported from Monroe County, 

 Water Gap, and from Berks and Philadelphia Counties. 



VIRGINIA 



AVilliamsburg, E. Jerome Grimes 2637, June 1, 1920. In high flat, dry 

 open oak woods, in sandy soil; Grimes 3556, May 9, 1921. Flat white oak 

 woods. Sandy soil and neutral. 



CLEISTES L. a Rich. 



Cleistes divaricata {L.) Ames comb. nov. Arethusa divari- 

 cata L. Sp. PI. 2 (1753) 951. Pogonia divaricata R. Br. in Ait. 

 Hort. Kew ed. 2, 5 (1813) 203. 



The last species for consideration is the Pogonia divaricata 

 of the Manual. This is southern in its distribution, but reaches 

 as far north as the pine barrens of New Jersey. It agrees vegeta- 

 tively with Pogonia and Isotria, but seems to have more in com- 

 mon with the neotropical species that have been referred to 

 Cleistes, and should, if my views are adopted, be included in 

 that genus. Although it has been placed in Pogonia by all mod- 

 ern authors, it would seem that the characters emphasized in the 

 key remove it clearly from that genus. 



It is worthy of note that Isotria antedates Cleistes, and that 

 should Cleistes not be taken up, the neotropical species that are 

 not members of Triphora or Psilochilus would properly become 

 members of the genus Isotria. (Plate 108.) 



[ 21 J 



