Title: Sphenopteris sellardsii, a problematical pteridosperm from the Permian of Kansas
Description: Discusses the characteristics of Sphenopteris sellardsii, a new species of pteridosperm based on fertile foliage from the Elmo Limestone member of Early Permian age in east-central Kansas.
Subjects: Paleobotany, Sphenopteris
Places: Kansas
Time periods: Permian