. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. Ill] PSILOPHYTON 21 the removal of the smooth axes bearing fnictifications to a separate genus could hardly be justified. Hailed himself describes a new s^oecies {P. GoUhdnnidtii) in which the axes below were spinous, though without visible macroscopic emergences in the higher. Fig. G. Psilophyioii princeps, Dawson, from the Lower Devonian of Roragen, Norway. Fer- tile axes (the Daivsonites arcuatus of Halle) without macroscopic emergences. After Halle (1916). parts. We shall return to this point a little later wh
. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. Ill] PSILOPHYTON 21 the removal of the smooth axes bearing fnictifications to a separate genus could hardly be justified. Hailed himself describes a new s^oecies {P. GoUhdnnidtii) in which the axes below were spinous, though without visible macroscopic emergences in the higher. Fig. G. Psilophyioii princeps, Dawson, from the Lower Devonian of Roragen, Norway. Fer- tile axes (the Daivsonites arcuatus of Halle) without macroscopic emergences. After Halle (1916). parts. We shall return to this point a little later when we shall endeavour to show that in P. j^^'i'i^cejJS, the axes ahvays bear emergences, though sometimes they are of microscopic size. We may agree with Halle that the spiny shoots {P. ornatum of Dawson) are not known in the fertile state. These shoots are 1 Halle (1916), p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Arber, E. A. Newell (Edward Alexander Newell), 1870-1918; Arber, Agnes Robertson, 1879-1960. Cambridge, The University Press
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