archegonial neck


archegonial neck
  Narrow, terminal part of an archegonium through which sperm enter during the process of fertilization.

Expanded glossary of Cycad terms . 2014.

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  • neck canal cells —   Column of cells within an archegonial neck that are lysed during fertilization …   Expanded glossary of Cycad terms

  • 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

  • archegonium — archegonial, archegoniate /ahr ki goh nee it, ayt /, adj. /ahr ki goh nee euhm/, n., pl. archegonia / nee euh/. Bot. the female reproductive organ in ferns, mosses, etc. [1850 55; < NL, equiv. to archegon ( < Gk archégonos first of a race; see… …   Universalium

  • fern — fernless, adj. fernlike, adj. /ferrn/, n. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a… …   Universalium

  • Fern — /ferrn/, n. a female given name. * * * Any of about 10,000–12,000 species (division Filicophyta) of nonflowering vascular plants that have true roots, stems, and complex leaves and reproduce by spores. Though ferns were once classified with the… …   Universalium

  • Moss — For other uses, see Moss (disambiguation). Moss Temporal range: Carboniferous[1] – recent …   Wikipedia

  • conifer — /koh neuh feuhr, kon euh /, n. 1. any of numerous, chiefly evergreen trees or shrubs of the class Coniferinae (or group Coniferales), including the pine, fir, spruce, and other cone bearing trees and shrubs, and also the yews and their allies… …   Universalium

  • Marchantiophyta — Not to be confused with Hepatica, a flowering plant that may also be called liverwort . Liverworts Temporal range: 472–0 Ma …   Wikipedia