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| 001 | 76146 | ||
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| 005 | 20260610134748.0 | ||
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| 040 | _aUtSlPG | ||
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_aen _2iso639-1 |
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| 050 | 4 | _aQE | |
| 100 | 1 |
_aSeward, A. C. _q(Albert Charles), _d1863-1941 |
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| 245 | 1 | 0 | _aFossil plants, Vol. 3 |
| 264 | 1 |
_aSalt Lake City, UT : _bProject Gutenberg, _c2025 |
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_a1 online resource : _bmultiple file formats |
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_atext _btxt _2rdacontent |
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_acomputer _bc _2rdamedia |
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_aonline resource _bcr _2rdacarrier |
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| 500 | _aRelease date is 2025-05-23 | ||
| 508 | _aPeter Becker, Robert Tonsing and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) | ||
| 520 | _a"Fossil plants, Vol. 3 : A text-book for students of botany and geology" by Seward is a scientific textbook written in the early 20th century. It concentrates on fossil gymnosperms—especially seed ferns (Pteridospermeae), cycad-like plants, cordaites, and Bennettitales—using comparative anatomy, morphology, and systematics, with frequent reference to living cycads to frame evolutionary interpretations. The volume is aimed at students of botany and geology and is richly illustrated. The opening of the volume sets its scope in a preface that explains the emphasis on gymnosperms and postpones a global survey of past floras, then launches into a detailed primer on living Cycadales to prepare readers for fossil comparisons. This primer covers cycad habit and diversity, distribution, fronds and stems, reproductive structures (dioecious strobili versus the free megasporophylls of Cycas), seed structure with pollen chambers and motile sperm, probable insect pollination, and distinctive anatomy such as manoxylic wood, multiple cambial rings, and girdle leaf-traces; it also outlines the main tribes and genera (Cycas, Zamia, Dioon, Encephalartos, Ceratozamia, Macrozamia, Microcycas, Stangeria, Bowenia). The text then moves into the Pteridosperms with Lyginopteris oldhamia, clarifying nomenclatural history (preferring Lyginopteris over Lyginodendron for certain casts) and summarizing stem anatomy: a large pith, broad secondary xylem with prominent medullary rays, mesarch leaf-trace bundles, and a reticulate cortical stereome, setting the stage for linking stems, fronds, and seeds (Lagenostoma). (This is an automatically generated summary.) | ||
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_pOriginally published: _cCambridge: Cambridge University Press, 1917 |
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| 653 | _aPaleobotany | ||
| 856 | 4 | _uhttps://archive.org/details/fossilplantstext00sewarich | |
| 856 | 4 | 0 | _uhttps://www.gutenberg.org/ebooks/76146 |
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_c116871 _d116871 |
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