[Laboratory VII - The Origin of Seed Plants]

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WWW info on early seed plants:

Banks, H.P., S. Leclercq, and F.M. Hueber. 1975. Anatomy and morphology of Psilophyton dawconii, sp. no., from the Late Lower Devonian of Quebec (Gaspe), and Ontario, Canada. Palaeontographica America 8:77-127.

Beck, C.B. 1957. Tetraxylopteris schmidtii gen. et sp. nov., a probably pteridosperm precursor from the Devonian of New York. American Journal of Botany 44:350-367.

Beck, C.B. 1960. Connection between Archaeopteris and Callixylon. Science 131:1524-1525.

Beck, C.B. 1970. The appearance of gymnospermous structure. Biological Reviews 45:379-400.

Beck, C.B., K. Coy and R. Schmid. 1982. Observation on the fine structure of Callixylon wood. American Journal of Botany 69:54-76.

Benson, M.J. 1914. Sphaerostoma ovale (Conostoma oval et intermedium,Williamson), a Lower Carboniferous ovule from Pettycur, Fifeshire, Scotland. Transactions of the Royal Society of Edinburgh 50:1-15.

Bernard, P.D.W. 1959. On Eosperma oxroadense gen. at sp. nov.: a new Lower Carboniferous seed from East Lothian. Annals of Botany, new series 23:285-296.

Bonamo, P.M. and H.P. Banks. 1975. The Progymnospermopsids: Building a concept. Taxon 24:569-759.

DiMichele, W.A., J.I. Davis and R.G. Olmstead. 1989. Origins of heterospory and the seed habit: the role of heterochrony. Taxon 38:1-11.

Eggert, D.A. and T.N. Taylor. 1971. Telangiopsis gen. nov., an Upper Mississippian pollen organ from Arkansas. Botanical Gazette 132:30-37.

Gensel, P.G. 1979. Two Psilophyton species from the Lower Devonian of eastern Canada with a discussion of morphological variation within the genus. Palaeontographica B 168:81-99.

Long, A.G. 1944. On the prothallus of Lageonstoma ovoides Will. Annals of Botany, new series 8:105-117.

Long, A.G. 1963. Some specimens of Lyginorachis papilio Kidston associated with stems of Pitys. Transactions of the Royal Society of Edinburgh 65:211-224.

Millay, M.A. and D.A. Eggert and R.L. Dennis. 1978. Morphology and ultrastructure of four Pennsylvanian prepollen types. Micropaleontology 24:305-315.

Millay, M.A. and T.N. Taylor. 1977. Feraxothexa gen. n., a lyginopterid pollen organ from the Pennsylvanian of North America. American Journal of Botany 64:177-185.

Oliver, F.W. and D.H. Scott. 1904. On the structure of the Paleozoic seed Lagenostoma lomxi, with a statement of the evidence upon which it is referred to Lyginodendron. Philosophical Transactions of the Royal Society of Edinburgh 197B:193-247.

Phillips, T.L., H.N. Andrews and P.G. Gensel. 1972. Two heterosporous species of Archaeopteris from the Upper Devonian of West Virginia. Palaeontographica B 139:47-71.

Rothwell, G.W., S.E. Scheckler and W.H. Gillespie. 1989. Elkinsia gen. nov., a late Devonian gymnosperm with cupulate ovules. Botanical Gazette 150:170-189.

Scheckler, S.E. 1975. A fertile axis of Triloboxylon ashlandicum, a progymnosperm from the Upper Devonian of New York. American Journal of Botany 62:923-934.

Scheckler, S.E. 1976. Ontogeny of progymnosperms, Part 1: Shoots of Upper Devonian Aneurophytales. Canadian Journal of Botany 54:202-219.

Scheckler, S.E. 1978. Ontogeny of progymnosperms, Part 2: Shoots of Upper Devonian Archaeopteridales. Canadian Journal of Botany 56:3136-3170.

Taylor, T.N. and M.A. Millay. 1981a. Morphologic variability of Pennsylvanian lyginopterid seed ferns. Review of Palaeobotany and Palynology 32:27-62.

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