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You can view and copy the source of this page. {{Treatment/ID |accepted_name=Ephemerum |accepted_authority=Hampe |publications={{Treatment/Publication |title=Flora |place=20: 285. 1837, }} |basionyms= |synonyms= |hierarchy=Ephemeraceae;Ephemerum |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Ephemeraceae]]</div><div class="higher-taxon"><small>genus</small>[[Ephemerum]]</div></div> |etymology=Greek ephemeros, of short duration |volume=Volume 27 |mention_page=page 647, 648, 649, 653 |treatment_page=page 650 }}<!-- --><span class="statement" id="st-d0_s0" data-properties="stem presence"><b>Stems </b>absent.</span> <span class="statement" id="st-d0_s1" data-properties="leaf arrangement or shape"><b>Leaves </b>scarcely contorted when dry;</span> <span class="statement" id="st-d0_s2" data-properties="costa development">costa well-developed, except generally absent or weak in E. serratum;</span> <span class="statement" id="st-d0_s3" data-properties="distal laminal fragility or texture;distal cell fragility or texture">laminal cells lax in the proximal half of the leaf, in the distal half firmer, smaller, and usually papillose.</span> <span class="statement" id="st-d0_s4" data-properties="laminal cell architecture or arrangement;laminal cell size;laminal cell relief;laminal cell reproduction;laminal cell reproduction;laminal cell reproduction"><b>Sexual </b>condition dioicous or autoicous, commonly rhizautoicous.</span> <span class="statement" id="st-d0_s5" data-properties="capsule dehiscence;capsule shape;capsule architecture or shape;capsule location"><b>Capsule </b>cleistocarpous, ovoid and distinctly apiculate, more than 0.5 mm from base to apex;</span> <span class="statement" id="st-d0_s6" data-properties="cell-layer quantity">exothecium of 2 cell-layers;</span> <span class="statement" id="st-d0_s7" data-properties="columella presence;capsule life cycle;species prominence;area coloration">columella present in maturing capsules of E. cohaerens, but in other species visible only as pigmented areas at base and tip of the spore sac.</span> <span class="statement" id="st-d0_s8" data-properties="calyptra duration;calyptra shape;calyptra shape;calyptra shape;calyptra position relational;calyptra position or shape;calyptra quantity;calyptra some measurement"><b>Calyptra </b>fugacious, cucullate, sometimes lobed or torn at the base, covering the distal 2/3 of the capsule, mostly more than 0.2 mm.</span><!-- -->{{Treatment/Body |distribution=Nearly worldwide in temperate and tropical regions |discussion=<p>Species ca. 28 (4 in the flora).</p><!-- --><p>All Ephemerum taxa in the flora have the same chromosome number, n = 27. Mixed colonies are common, although hybrid forms are not evident. To a large extent, the species occupy similar ranges.</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Leaves ecostate or in the distal two-thirds very weakly costate. |[[Ephemerum serratum|Ephemerum serratum]] |-id=key-0-1 |1 |Leaves distinctly costate, at least distal to the middle |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Distal laminal cells spinulose or spinose. |[[Ephemerum spinulosum|Ephemerum spinulosum]] |-id=key-0-2 |2 |Distal laminal cells smooth or papillose |[[#key-0-3| > 3]] |-id=key-0-3 |3 |Distal laminal cells smooth, in ± diagonal rows. |[[Ephemerum cohaerens|Ephemerum cohaerens]] |-id=key-0-3 |3 |Distal laminal cells papillose in ± vertical rows. |[[Ephemerum crassinervium|Ephemerum crassinervium]] |} </div></div><!-- -->{{#Taxon: name=Ephemerum |authority=Hampe |rank=genus |parent rank=family |synonyms= |basionyms= |family=Ephemeraceae |distribution=Nearly worldwide in temperate and tropical regions |reference=None |publication title=Flora |publication year= |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V27/V27_958.xml |genus=Ephemerum |area coloration=pigmented |calyptra duration=fugacious |calyptra position or shape=distal |calyptra position relational=covering |calyptra quantity=2/3 |calyptra shape=torn;lobed;cucullate |capsule architecture or shape=apiculate |capsule dehiscence=cleistocarpous |capsule life cycle=maturing |capsule shape=ovoid |cell-layer quantity=2 |columella presence=absent |costa development=well-developed |distal cell fragility or texture=firmer |distal laminal fragility or texture=firmer |laminal cell architecture or arrangement=lax |laminal cell relief=papillose |laminal cell reproduction=autoicous;dioicous;sexual |laminal cell size=smaller |leaf arrangement or shape=contorted |species prominence=visible |stem presence=absent }}<!-- -->[[Category:Treatment]][[Category:Ephemeraceae]] Templates used on this page: Template:Ephemeraceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Ephemerum.