Carpannularia re-examined
DOI:
https://doi.org/10.54991/jop.1968.786Abstract
Carpannularia americana Elias is a synonym of Annularia mucronata Schenk, not A. stellate (Schlotheim) Wood. The suggestion that reproductive structures are attached to one specimen cannot be sustained. There is only a case for intimate association.
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Abbott Maxine L 1958. The American species of Asterophyllite, Annularia, and Sphenophyllum. Bull. Am. Paelont. 38 (174): 289-390.
Baxter, Robert W. 1963. Calamacarpon insignis, a new genus of heterosporous petrified calamitean cones from the American Carboniferous: Amer. J. Bot. 50: 469-476.
Baxter Robert W 1964. The megagametophyte and microsporangia of Calamocarpon insignis. Phytomorphology. 14: 481-487.
Boureau Edouard 1964. Traite de Palaeobotanique. 3, Sphenophyta, Noeggerathiophyta. Paris.
Elias Maxim K 1931. On a seed-bearing Annularia and on Annularia foliage. Kans. Univ. Sci. bull. 20: 115-159.
Walton John 1936. On the factors which influence the external form of fossil plants; with descriptions of the foliage of some species of the Palaeozoic Equisetalean genus Annularia Sternberg. Phil. Trans. R. Soc. 226B: 219-237.
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