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Gnetophyte - Pollination, Cones, Ovules | Britannica

SUBSCRIBESUBSCRIBESUBSCRIBEHomeHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyGames & QuizzesVideosOn This DayOne Good FactDictionaryNew ArticlesHistory & SocietyLifestyles & Social IssuesPhilosophy & ReligionPolitics, Law & GovernmentWorld HistoryScience & TechHealth & MedicineScienceTechnologyBiographiesBrowse BiographiesAnimals & NatureBirds, Reptiles & Other VertebratesEnvironmentFossils & Geologic TimeInsects & Other InvertebratesMammalsPlantsGeography & TravelGeography & TravelArts & CultureEntertainment & Pop CultureLiteratureSports & RecreationVisual ArtsImage GalleriesPodcastsSummariesTop QuestionsLists and StoriesBritannica KidsAsk the ChatbotGames & QuizzesHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyVideosgnetophyteIntroductionGeneral featuresForm and functionStemLeavesReproductive structures and functionPollination and embryogenyClassificationAnnotated classificationCritical appraisalReferences & Edit HistoryQuick Facts & Related TopicsImagesPlants: From Cute to CarnivorousSciencePlantsConifers & Other GymnospermsFacebookXhttps://www.britannica.com/plant/gnetophyteThe Gymnosperm Database - GnetophytegnetophyteForm and functionErnest M. Gifford Emeritus Professor of Botany, University of California, Davis. Coauthor of Morphology and Evolution of Vascular Plants.Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....Historyconesplantbractsconeelongatedmicrosporangiabracteolespollenpollen grainsfossil recordPermian PeriodMegasporangiateovulenucleiconvertingmegagametophytePollinationpollen grainspollinationinsectscelluloseseedbracteolesadaptationconspicuouscomprisesfertilizationAncient welwitschiagenerameiosisderivativesgymnospermszygoteembryoconstitutingseed dispersal

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