[AQ] Dawson, “Report on Devonian Plants,” 1870.
[AR] “Journal of the Geological Society,” 1865.
Fig. 17.—Ptilophyton plumosum (Lower Carboniferous, Nova Scotia). Natural size and magnified.
A second type of plant, which may have been Rhizocarpean in its affinities, is that to which I have given the name Ptilophyton.[AS] It consists of beautiful feathery fronds, apparently bearing on parts of the main stem or petiole small rounded sporocarps. They are found abundantly in the Middle Erian of the State of New York, and also occur in Scotland, while one species appears to occur in Nova Scotia, as high as the Lower Carboniferous (Figs. [17], [18]).
[AS] Plumalina of Hall.
Fig. 18.—Ptilophyton Thomsoni (Scotland), a, Impression of plant in vernation, b, Branches conjecturally restored, c, Branches of Lycopodites Milleri, on same slab.