96 Trans. Acad. Sci. of St. Louis 



Asplenium platyneuron forma serratum (E. S. 

 Miller) R. Hoffman. On chert and limestone rocks, 

 with the species. 



Potystichum aclirostichoides forma incisum (Gray) 

 Gilbert. With typical form, chert hills, Northwest 

 Arkansas. 



Dryopteris spinidosa (Muell.) Knntze. On north 

 slope, Magazine Mountain, Logan Co. (D. M. 

 Moore). 



Woodsia scopidina D. C. Eaton. On sandstone 

 ledges, north side of Magazine Mountain, Logan Co., 

 near the summit. 



Dennstaedtia punctilobula (Mich.) Moore. On par- 

 tially shaded damp sandstone cliffs, north side of 

 Magazine Mountain, Logan Co. 24142. 



Ophioglossaceae: 



Ophioglossum Engelmanni Prantl. 5376 Fulton, 

 Hempstead Co., clay barrens; also in glades and 

 rocky barrens of the Ozark region. 



Botrychium obliquum var. tenuifolium (Underw.) 

 Gilbert. 24008 McNab, Hempstead Co. 



Botrychium obliquum var. dissectum (Spreng.) 

 Clute. Farmington, Washington Co. Low woods, 

 rare, occurs with the species. 



Equisetaceae: 



Equisetum hyemale var. intermedium Eat. fide J. 

 H. Schaffner. On calcareous deposits near spring, 

 Jasper, Newton Co. 



