96 Trans. Acad. Sci. of St. Lowis 
Asplenium platyneuron forma serratum (KE. 8. 
Miller) R. Hoffman. On chert and limestone rocks, 
with the species. 
Polystichwm achrostichoides forma incisum (Gray) 
Gilbert. With typical form, chert hills, Northwest 
Arkansas, 7 
Dryopteris spinulosa (Muell.) Kuntze. On north 
slope, Magazine Mountain, Logan Co. (D. M. 
Moore). 
Woodsia scopiina 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. dissectwm (Spreng-) 
Clute. Farmington, Washington Co. Low woods, 
rare, occurs with the species. 
Equisetaceae: 
Equisetum hyemale var. intermedium Fat. fide J- 
H. Schaffner. On calcareous deposits near spring, 
Jasper, Newton Co. 
