diarch xylem

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diarch — ˈdīˌärk adjective Etymology: di + Greek archē beginning, origin more at archi : having two xylem groups … Useful english dictionary
lower vascular plant — ▪ biology Introduction formerly pteridophyte, also called vascular cryptogam, any of the spore bearing vascular plants, including the ferns, club mosses, spike mosses, quillworts, horsetails, and whisk ferns. Once considered of the… … Universalium
Callistophytales — Zeitraum Oberes Karbon (Pennsylvanium) 318 bis 299 Mio. Jahre Fundorte USA, Frankreich Systematik ohne Rang: Charophyta Reich … Deutsch Wikipedia
Protopityales — Protopitys Zeitraum Unteres Karbon (Tournaisium) Systematik ohne Rang: Charophyta Reich: Pflanzen (Plantae) Unterreich … Deutsch Wikipedia
cycadophyte — ▪ plant Introduction any member of a diverse collection of mostly extinct primitive gymnospermous plants. They probably had their origins among the progymnosperms of the Devonian Period (416 to 359 million years ago), possibly among a… … Universalium
Protopitys — Zeitraum Unteres Karbon (Tournaisium) Systematik ohne Rang: Charophyta Reich: Pflanzen (Plantae) Abteilung … Deutsch Wikipedia

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