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5.5.6: Key Terms

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    adventitious
    describes an organ that grows in an unusual place, such as a roots growing from the side of a stem
    antheridium
    male gametangium
    archegonium
    female gametangium
    capsule
    case of the sporangium in mosses
    charophyte
    other term for green algae; considered the closest relative of land plants
    club mosses
    earliest group of seedless vascular plants
    diplontic
    diploid stage is the dominant stage
    embryophyte
    other name for land plant; embryo is protected and nourished by the sporophyte
    extant
    still-living species
    extinct
    no-longer-existing species
    fern
    seedless vascular plant that produces large fronds; the most advanced group of seedless vascular plants
    gametangium
    structure on the gametophyte in which gametes are produced
    gemma
    (plural, gemmae) leaf fragment that spreads for asexual reproduction
    haplodiplodontic
    haploid and diploid stages alternate
    haplontic
    haploid stage is the dominant stage
    heterosporous
    produces two types of spores
    homosporous
    produces one type of spore
    hornworts
    group of non-vascular plants in which stomata appear
    horsetail
    seedless vascular plant characterized by joints
    lignin
    complex polymer impermeable to water
    liverworts
    most primitive group of the non-vascular plants
    lycophyte
    club moss
    megaphyll
    larger leaves with a pattern of branching veins
    megaspore
    female spore
    microphyll
    small size and simple vascular system with a single unbranched vein
    microspore
    male spore
    mosses
    group of bryophytes in which a primitive conductive system appears
    non-vascular plant
    plant that lacks vascular tissue, which is formed of specialized cells for the transport of water and nutrients
    peat moss
    Sphagnum
    peristome
    tissue that surrounds the opening of the capsule and allows periodic release of spores
    phloem
    tissue responsible for transport of sugars, proteins, and other solutes
    protonema
    tangle of single-celled filaments that forms from the haploid spore
    rhizoids
    thin filaments that anchor the plant to the substrate
    seedless vascular plant
    plant that does not produce seeds
    seta
    stalk that supports the capsule in mosses
    sporocyte
    diploid cell that produces spores by meiosis
    sporophyll
    leaf modified structurally to bear sporangia
    sporopollenin
    tough polymer surrounding the spore
    streptophytes
    group that includes green algae and land plants
    strobili
    cone-like structures that contain the sporangia
    tracheophyte
    vascular plant
    vascular plant
    plant containing a network of cells that conducts water and solutes through the organism
    vein
    bundle of vascular tissue made of xylem and phloem
    whisk fern
    seedless vascular plant that lost roots and leaves by reduction
    xylem
    tissue responsible for long-distance transport of water and nutrients

    This page titled 5.5.6: Key Terms was last modified on Sun, 25 Dec 2022 03:38:46 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax via source content that was edited to the style and standards of the LibreTexts platform.