“After discounting doubtful data, C-values for 62 pteridophyte species remained acceptable for analysis.”

“All pteridophyte roots are referred to as adventitious, in the sense that they arise at points along the stem.”

“Lower vascular plant, formerly pteridophyte, also called vascular cryptogam, any of the spore-bearing vascular plants, including the ferns, club mosses, spike mosses, quillworts, horsetails, and whisk ferns.”

“His fields of interest include systematic botany, speciation, and pteridology.”

“New Zealand pteridology is now at the point where purely taxonomic investigations are likely to give way gradually to the study of more complex biosystematic problems.”

“The study of ferns and other pteridophytes is called pteridology.”

“A pteridologist is a specialist in the study of pteridophytes in a broader sense that includes the more distantly related lycophytes.”

“William Ralph Maxon, Smithsonian Institution pteridologist, was the author credited this treatment in the Flora.”

“Coal forests of giant lycopods, calamites, pteridophytes and ferns cover the tropical landmasses.”

“The site is rich in acidophilic species, particularly pteridophytes and bryophytes, and contains a number of regionally rare taxa.”

“The other especially weedy fern is bracken, which also unusually for pteridophytes has vessels.”