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| − | --><span class="statement" id="st-d0_s0" data-properties=""><b>Plants </b>tufted, grasslike, heterosporous (megaspores and microspores not alike), perennial;</span> <span class="statement" id="st-d0_s1" data-properties="plant arrangement or pubescence;plant growth form;plant reproduction;plant duration;plant duration;terrestrial growth form or habitat;terrestrial duration">evergreen aquatics to ephemeral terrestrials.</span> <span class="statement" id="st-d0_s2" data-properties="rootstock coloration;rootstock architecture or shape;rootstock shape"><b>Rootstock </b>brown, cormlike, lobed.</span> <span class="statement" id="st-d0_s3" data-properties="root orientation;root architecture;root architecture;central groove arrangement;eccentric strand architecture;eccentric lacuna architecture;eccentric lacuna position relational"><b>Roots </b>arising along central groove separating each rootstock lobe, simple or dichotomously branched, containing eccentric vascular strand and surrounding lacuna.</span> <span class="statement" id="st-d0_s4" data-properties="leaf arrangement or course or shape;leaf architecture;leaf arrangement;leaf shape;leaf shape;lacuna count;lacuna architecture;lacuna dehiscence or orientation;central collateral strand architecture;peripheral bundle count;peripheral bundle texture"><b>Leaves </b>linear, simple, spirally or distichously arranged, dilated toward base, tapering to apex, containing 4 transversely septate longitudinal lacunae, a central collateral vascular strand, and frequently several peripheral fibrous bundles;</span> <span class="statement" id="st-d0_s5" data-properties="">ligule inserted above sporangium.</span> <span class="statement" id="st-d0_s6" data-properties="cycle arrangement"><b>Megasporophylls </b>and microsporophylls usually borne in alternating cycles;</span> <span class="statement" id="st-d0_s7" data-properties="scale texture;phyllopodium texture;leaf position relational">hardened scales and phyllopodia occasionally surrounding leaves.</span> <span class="statement" id="st-d0_s8" data-properties="sporangium architecture or arrangement or growth form"><b>Sporangia </b>solitary, adaxial, embedded in basal cavity of leaf, velum (thin flap extending downward over sporangium) partly to completely covering adaxial surface of sporangium;</span> <span class="statement" id="st-d0_s9" data-properties="hundred count">megasporangium with several to hundreds of megaspores;</span> <span class="statement" id="st-d0_s10" data-properties="">microsporangium with thousands of microspores.</span> <span class="statement" id="st-d0_s11" data-properties="megagametophyte coloration;megagametophyte structure in adjective form;megagametophyte prominence"><b>Megagametophytes </b>white, endosporic, exposed when megaspore opens along proximal ridges;</span> <span class="statement" id="st-d0_s12" data-properties="archegonium count;archegonium count;neck cell coloration">archegonia 1 to several, indicated by quartets of brownish neck cells.</span> <span class="statement" id="st-d0_s13" data-properties="microgametophyte architecture;microgametophyte structure in adjective form;spermatozoid count;spermatozoid architecture"><b>Microgametophytes </b>9-celled, endosporic, antheridium releasing 4 multitailed spermatozoids.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>tufted, grasslike, heterosporous (megaspores and microspores not alike), perennial; evergreen aquatics to ephemeral terrestrials. <b>Rootstock</b> brown, cormlike, lobed. <b>Roots</b> arising along central groove separating each rootstock lobe, simple or dichotomously branched, containing eccentric vascular strand and surrounding lacuna. <b>Leaves</b> linear, simple, spirally or distichously arranged, dilated toward base, tapering to apex, containing 4 transversely septate longitudinal lacunae, a central collateral vascular strand, and frequently several peripheral fibrous bundles; ligule inserted above sporangium. <b>Megasporophylls</b> and microsporophylls usually borne in alternating cycles; hardened scales and phyllopodia occasionally surrounding leaves. <b>Sporangia</b> solitary, adaxial, embedded in basal cavity of leaf, velum (thin flap extending downward over sporangium) partly to completely covering adaxial surface of sporangium; megasporangium with several to hundreds of megaspores; microsporangium with thousands of microspores. <b>Megagametophytes</b> white, endosporic, exposed when megaspore opens along proximal ridges; archegonia 1 to several, indicated by quartets of brownish neck cells. <b>Microgametophytes</b> 9-celled, endosporic, antheridium releasing 4 multitailed spermatozoids.</span><!-- |
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_817.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_817.xml |
| − | |archegonium count=several;1
| |
| − | |central collateral strand architecture=vascular
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| − | |central groove arrangement=separating
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| − | |cycle arrangement=alternating
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| − | |eccentric lacuna architecture=vascular
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| − | |eccentric lacuna position relational=surrounding
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| − | |eccentric strand architecture=vascular
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| − | |hundred count=several
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| − | |lacuna architecture=septate
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| − | |lacuna count=4
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| − | |lacuna dehiscence or orientation=longitudinal
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| − | |leaf architecture=simple
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| − | |leaf arrangement=arranged
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| − | |leaf arrangement or course or shape=linear
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| − | |leaf position relational=surrounding
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| − | |leaf shape=tapering;dilated
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| − | |megagametophyte coloration=white
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| − | |megagametophyte prominence=exposed
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| − | |megagametophyte structure in adjective form=endosporic
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| − | |microgametophyte architecture=9-celled
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| − | |microgametophyte structure in adjective form=endosporic
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| − | |neck cell coloration=brownish
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| − | |peripheral bundle count=several
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| − | |peripheral bundle texture=fibrous
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| − | |phyllopodium texture=hardened
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| − | |plant arrangement or pubescence=tufted
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| − | |plant duration=evergreen;perennial
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| − | |plant growth form=grasslike
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| − | |plant reproduction=heterosporous
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| − | |root architecture=branched;simple
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| − | |root orientation=arising
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| − | |rootstock architecture or shape=cormlike
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| − | |rootstock coloration=brown
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| − | |rootstock shape=lobed
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| − | |scale texture=hardened
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| − | |spermatozoid architecture=multitailed
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| − | |spermatozoid count=4
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| − | |sporangium architecture or arrangement or growth form=solitary
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| − | |terrestrial duration=ephemeral
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| − | |terrestrial growth form or habitat=aquatics
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Plants tufted, grasslike, heterosporous (megaspores and microspores not alike), perennial; evergreen aquatics to ephemeral terrestrials. Rootstock brown, cormlike, lobed. Roots arising along central groove separating each rootstock lobe, simple or dichotomously branched, containing eccentric vascular strand and surrounding lacuna. Leaves linear, simple, spirally or distichously arranged, dilated toward base, tapering to apex, containing 4 transversely septate longitudinal lacunae, a central collateral vascular strand, and frequently several peripheral fibrous bundles; ligule inserted above sporangium. Megasporophylls and microsporophylls usually borne in alternating cycles; hardened scales and phyllopodia occasionally surrounding leaves. Sporangia solitary, adaxial, embedded in basal cavity of leaf, velum (thin flap extending downward over sporangium) partly to completely covering adaxial surface of sporangium; megasporangium with several to hundreds of megaspores; microsporangium with thousands of microspores. Megagametophytes white, endosporic, exposed when megaspore opens along proximal ridges; archegonia 1 to several, indicated by quartets of brownish neck cells. Microgametophytes 9-celled, endosporic, antheridium releasing 4 multitailed spermatozoids.
Distribution
Nearly worldwide.
Discussion
Genus 1, species ca. 150 (24 species in the flora).
Illustrations