Product Description

The “Gale Encyclopedia of Science” is written at a level somewhere between the introductory sources and the highly technical texts currently available. This six-volume set covers all major areas of science and engineering, as well as mathematics and the medical and health sciences, while providing a comprehensive overview of current scientific knowledge and technology. Alphabetically arranged entries provide a user-friendly format that makes the broad scope of information easy to access and decipher. Entries typically describe scientific concepts, provide overviews of scientific areas and, in some cases, define terms.

Product Description
Chapters: Pteridospermatophyta, Bennettitales, Chaetocladus, Eohostimella, Submerged Forest, Pecopteris, Hymenaea Protera, Cordaites, Calamitaceae, Oleanane, Progymnosperm, Gangamopteris, Nemastomatales, Nematoplexus, Parka, Pleuromeia, Zosterophyllopsida, Sciadophyton, Pannaulika, Regnellites, Williamsonia, Orestovia, Scylaspora, Glossopteridales, Rodeites, Alismaticarpum, Sagisma, Noeggerathiales, Eophyllophyton, Psaronius, Boreotropical Flora, Waputikia, Haplostigma, Margaretia, Yuknessia, Bennettites, Dictyophycus, Stigmaria, Annularia, Dalyia, Pachytheca, Neuropteris, Palaeoxylology. Source: Wikipedia. Pages: 98. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: The term Pteridospermatophyta (or "seed ferns") refers to several distinct groups of extinct seed plants (spermatophytes). The oldest fossil evidence of plants of this type is of late Devonian age, and they flourished particularly during the Carboniferous and Permian periods. Pteridosperms declined during the Mesozoic Era and had mostly disappeared by the end of the Cretaceous Period, though some fossil pteridosperm-like plants seem to have survived into Eocene times in Tasmania. The concept of the pteridosperms goes back to the late 19th century when palaeobotanists came to realise that many Carboniferous fossils resembling fern fronds had anatomical features more reminiscent of the modern-day seed plants the cycads. The German palaeobotanist Henry Potonié coined the term "Cycadofilices" for such fossils, suggesting that they were a group of non-seed plants intermediate between the ferns and cycads. Shortly afterwards, the British palaeobotanists Frank Oliver and Dukinfield Henry Scott (with the assistance of Oliver's student at the time Marie Stopes) made the critical discovery that some of these fronds (Lyginopteris) were as...More: http://booksllc.net/?id=1815052 ... Read more

Product Description
Chapters: Glossary of Botanical Terms, List of Plant Morphology Terms, Plant Physiology, Palynology, Ethnolichenology, Paleobotany, Ethnobotany, Micropaleontology, Plant Anatomy, Phytosociology, Paleoethnobotany, Phytochemistry, Pomology, Bryology, Agrostology. Source: Wikipedia. Pages: 165. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and comparing large numbers of terms together. This glossary is incomplete; you can help by expanding it: you can also help by adding illustrations that assist an understanding of the terms. Watershoot Stearn, W.T. 1983. Botanical Latin. David ... Read more