106 Trans. Acad. Set. of St. Louis 



Spiranthes oralis Lindl. (Ibidium ovale (Lindl.) 

 House). Conway, Faulkner Co. 



Spiranthes vernalis Engelm. & Gray. Fayette- 

 ville, Washington Co.; 8146 Ozark, Franklin Co. 



Corrallorrhiza Wisteriana Conrad. Fayetteville, 

 Washington Co. ; Fulton, Hempstead Co. 



Pogonia verticillata (Willd.) Nutt. 26894 Law- 

 rence, Garland Co. 



DICOTYLEDONAE. 



Salicaceae : 



Po pubis balsamifera var. virginiana (Henry) Sarg. 

 Common Cottonwood. Formerly Populus deltoides 

 Marsh. (P. monilifera Ait.) Distribution general 

 along streams. 



Salix cordata Muhl. Johnston, Washington Co. 



Salix nigra var. altissima Sarg. Tall black wil- 

 low. 5394 Fulton, Hempstead Co. 



Salix longifolia Muehl. Sand Bar Willow. 24978, 

 McNab, Hempstead Co. ; 25013, Little Eock, Pulaski 

 Co. ; 25085, Helena, Phillips Co. 



Salix longipes var. Wardii (Bebb) Schneider. 

 Ward's willow. Fayetteville, Washington Co.; 

 Eureka Springs and Beaver, Carroll Co.; Cotter, 

 Marion Co. 



Salix longipes var. Wardii x nigra. 20500 Eureka 

 Springs, Carroll Co. 



Leitneriaceae: 



Leitneria floridana Chapm. Cork tree. 4792 

 Moark, 6074 Corning, Clay Co.; St. Francis River 

 swamps (S. M. Coulter). 



