Current status of the Progymnospermopsida

The Identity of Archaeopteris and Callixylon

Charles B. Beck · Brittonia · 1960 · 162 citations

Life Sciences, Archaeology, Botany +8

The ontogeny of Carboniferous arborescent Lycopsida

Donald A. Eggert · Palaeontographica Abteilung B · 1961 · 143 citations

Life Sciences, Biology, Zoology +5

THE APPEARANCE OF GYMNOSPERMOUS STRUCTURE

Charles B. Beck · Biological reviews/Biological reviews of the Cambridge Philosophical Society · 1970 · 112 citations

Life Sciences, Anatomy, Biology +8

ANATOMY AND RELATIONSHIPS OF SOME DEVONIAN PROGYMNOSPERMS FROM NEW YORK

Stephen E. Scheckler, Harlan P. Banks · American Journal of Botany · 1971 · 85 citations

Life Sciences, Anatomy, Plant Sciences +13

TETRAXYLOPTERIS SCHMIDTII GEN. ET SP. NOV., A PROBABLE PTERIDOSPERM PRECURSOR FROM THE DEVONIAN OF NEW YORK

Charles B. Beck · American Journal of Botany · 1957 · 83 citations · Full text

Life Sciences, Botany, Plant Sciences +6