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1 - Lycopodiaceae

from Division 1 - Lycopodiophyta

Peter Sell  and
Gina Murrell
Peter Sell
Affiliation:
University of Cambridge
Gina Murrell
Affiliation:
University of Cambridge
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Summary

Perennial herbs. Stems elongated, not, little or considerably branched, bearing roots. Leaves small, simple, bearing 1 vein, without ligule. Homosporous. Sporangia in leaf axils, all alike, borne near the base of the upper surface of the leaves, which vary from being like stem leaves and arranged among them to being strongly differentiated from the stem leaves and arranged in terminal cones, unilocular, compressed, dehiscing by splitting, with numerous spores. Gametophyte subterranean, saprophytic and with mycorrhizae; antheridia in the centre of the apical part of the gametophyte, containing biciliate spermatozoids; archegonia in a ring around the antheridia.

Contains six to eight genera in temperate and tropical regions.

  • Stems ascending, divided dichotomously into branches of equal length; sporangia axillary 1. Huperzia

  • Stems creeping and rooted, with short lateral branches; sporangia in terminal cones 2.

  • Leaves 4-ranked, opposite and decussate; branches more or less flattened 4. Diphasiastrum

  • Leaves in whorls, alternate or spiral; branches not flattened 3.

  • Stem leaves and sporangium-bearing leaves similar, without either hair points or scarious margins 2. Lycopodiella

  • Either stem leaves with hair points or sporangium-bearing leaves with scarious toothed margins

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    Flora of Great Britain and Ireland , pp. 2 - 5
    Publisher: Cambridge University Press
    Print publication year: 2018

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    • Lycopodiaceae
    • Peter Sell, University of Cambridge, Gina Murrell, University of Cambridge
    • Book: Flora of Great Britain and Ireland
    • Chapter DOI: https://doi.org/10.1017/9780511980091.008
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    • Lycopodiaceae
    • Peter Sell, University of Cambridge, Gina Murrell, University of Cambridge
    • Book: Flora of Great Britain and Ireland
    • Chapter DOI: https://doi.org/10.1017/9780511980091.008
    Available formats
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    • Lycopodiaceae
    • Peter Sell, University of Cambridge, Gina Murrell, University of Cambridge
    • Book: Flora of Great Britain and Ireland
    • Chapter DOI: https://doi.org/10.1017/9780511980091.008
    Available formats
    ×