seed fern

(Plants) another name for pteridosperm

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

seed′ fern`

any of various fossil plants of the order Lyginopteridales (or Cycadofilicales) that had fernlike leaves and reproduced by means of seeds. Also called pteridosperm.

[1925–30]

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Noun

seed fern - an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)

pteridosperm

gymnosperm - plants of the class Gymnospermae having seeds not enclosed in an ovary

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References in periodicals archive

nov., a seed fern vine from the Upper Mississippian.

How Paleozoic vines and lianas got off the ground: on scrambling and climbing Carboniferous--early Permian pteridosperms

The discovery of fossilized stumps of Glossopteris, a seed fern now extinct, supports the view that during the Permian period - years 250-280,000,000 ago - Antarctica had a climate much warmer than it does today, according to Edith Taylor, a research scientist with Ohio State University's Byrd Polar Research Center.

Antarctica had a warmer past

Flowering plants evolved from extinct plants related to conifers, ginkgos, cycads, and seed ferns. The oldest known fossils from flowering plants are pollen grains.

New Fossils Push Origin of Flowering Plants Back by 100 Million Years to Early Triassic

Specific topics encompass the paleobotany of Livingston Island, Antarctica; targeted isolation and sequence assembly and characterization of the white spruce; the complete chloroplast genome sequence of a tree fern; reverse genetic analyses of gene function in fern gametophytes; glossopterid seed ferns from the Late Permian period; pollen development; DNA barcoding in the Cycadales; expressed sequence tag analysis in Ginkgo biloba; frequent fires in ancient shrub tundra; the history of native plant communities in the South; past vegetation patterns of New Mexico's Rio Del Oso Valley; and East Asian monsoon and paleoclimatic data analysis.

Vascular plants and paleobotany

Paleozoic seed ferns. Paleobotany, Biology and Evolution of Fossil Plants: 529-619.

Bibliografia Botanica Iberica, 2010: Pteridophyta