View source for Alisma ← Alisma You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Alisma |accepted_authority=Linnaeus |publications={{Treatment/Publication |title=Sp. Pl. |place=1: 343. 1753; Gen. Pl. ed. 5; 160, 1754 |year=1754 }} |common_names=Water-plantain |basionyms= |synonyms= |hierarchy=Alismataceae;Alisma |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Alismataceae]]</div><div class="higher-taxon"><small>genus</small>[[Alisma]]</div></div> |etymology=ancient Greek name, adopted by Linnaeus from Dioscorides |volume=Volume 22 |mention_page= |treatment_page= }}<!-- --><span class="statement" id="st-d0_s0" data-properties="whole_organism duration;whole_organism location;whole_organism architecture;whole_organism location;whole_organism pubescence;whole_organism growth form"><b>Herbs,</b> perennial, submersed, floating-leaved, emersed, glabrous;</span> <span class="statement" id="st-d0_s1" data-properties="rhizome presence">rhizomes often present;</span> <span class="statement" id="st-d0_s2" data-properties="stolon presence">stolons absent;</span> <span class="statement" id="st-d0_s3" data-properties="corm presence">corms absent;</span> <span class="statement" id="st-d0_s4" data-properties="tuber presence">tubers absent.</span> <span class="statement" id="st-d0_s5" data-properties="root architecture"><b>Roots </b>not septate.</span> <span class="statement" id="st-d0_s6" data-properties="leaf architecture;leaf architecture"><b>Leaves </b>sessile or petiolate;</span> <span class="statement" id="st-d0_s7" data-properties="petiole shape">petiole triangular;</span> <span class="statement" id="st-d0_s8" data-properties="blade shape;marking coloration or reflectance;marking presence;base shape;margin architecture or shape;apex shape">blade with translucent markings absent, linear to ovate, base attenuate to rounded, margins entire, apex obtuse to acute.</span> <span class="statement" id="st-d0_s9" data-properties="inflorescences panicle orientation;inflorescences panicle location;inflorescences panicle location;whorl quantity"><b>Inflorescences </b>panicles, of 2–10 whorls, erect, emersed, rarely submersed;</span> <span class="statement" id="st-d0_s10" data-properties="bract fragility;bract architecture or pubescence or relief;apex shape;surface architecture or pubescence or relief">bracts delicate, smooth, apex acuminate, surfaces smooth.</span> <span class="statement" id="st-d0_s11" data-properties="flower reproduction"><b>Flowers </b>bisexual;</span> <span class="statement" id="st-d0_s12" data-properties="pedicel orientation">pedicels ascending;</span> <span class="statement" id="st-d0_s13" data-properties="bract shape;bract height or length or size;apex shape">bracts subtending pedicels, lanceolate, shorter than pedicels, apex acuminate;</span> <span class="statement" id="st-d0_s14" data-properties="receptacle shape">receptacle flattened;</span> <span class="statement" id="st-d0_s15" data-properties="sepal orientation;sepal relief;sepal growth form or texture">sepals erect, not sculptured, herbaceous;</span> <span class="statement" id="st-d0_s16" data-properties="petal coloration;petal coloration;petal architecture or shape">petals pink or white, entire;</span> <span class="statement" id="st-d0_s17" data-properties="stamen quantity;filament shape;filament pubescence">stamens 6–9, filaments filiform, glabrous;</span> <span class="statement" id="st-d0_s18" data-properties="pistil quantity;pistil arrangement;pistil fusion;receptacle shape;pattern shape">pistils 15–20, in ring around margin of flattened receptacle, not radiating in starlike pattern, distinct;</span> <span class="statement" id="st-d0_s19" data-properties="ovule quantity">ovules 1;</span> <span class="statement" id="st-d0_s20" data-properties="style position">styles lateral.</span> <span class="statement" id="st-d0_s21" data-properties="fruit shape;rib dehiscence or orientation;abaxial wing presence;lateral wing presence;lateral wing architecture or shape;abaxial keel presence"><b>Fruits </b>without longitudinal ribs, strongly laterally compressed, abaxial wings absent, lateral wings absent, abaxially 2–3-ribbed, abaxial keel absent, glands absent.</span> <span class="statement" id="st-d0_s22" data-properties="gland presence;x chromosome quantity">x = 7.</span><!-- -->{{Treatment/Body |distribution=Widely distributed;nearly worldwide |discussion=<p>Much controversy surrounds the treatment of Alisma in North America. At present three distinct native species in North America are generally recognized (P. Rubtzoff 1964) as well as the probable occurrence of two introduced species, one in California and the other in Alaska.</p><!-- --><p>Species 9 (5 in the flora).</p> |tables= |references={{Treatment/Reference |id=bj1968a |text=Björkquist, I. 1968. Studies in Alisma L. II. Chromosome studies, crossing experiments and taxonomy. Opera Bot. 19: 1--138. }}{{Treatment/Reference |id=hendricks1957a |text=Hendricks, A. J. 1957. A revision of the genus Alisma (Dill.) L. Amer. Midl. Naturalist 58: 470--493. }}{{Treatment/Reference |id=rubtzoff1964a |text=Rubtzoff, P. 1964. Notes on the genus Alisma. Leafl. W. Bot. 10: 90--95. }}{{Treatment/Reference |id=voss1958a |text=Voss, E. G. 1958. Confusion in Alisma. Taxon 7: 130--133. }} }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Style longer than or (equal to) ovary; anthers ellipsoid. |[[#key-0-2| > 2]] |-id=key-0-1 |1 |Style shorter than or (equal to) ovary; anthers ovoid to rounded. |[[#key-0-3| > 3]] |-id=key-0-2 |2 |Petals with obtuse apex, purplish white to purplish pink; style ± straight; leaf blade ovate to broadly lanceolate; Alaska. |[[A. plantago-aquatica|A. plantago-aquatica]] |-id=key-0-2 |2 |Petals with acute apex, purplish pink; style curved proximally; leaf blade narrowly elliptic to lanceolate; California. |[[A. lanceolatum|A. lanceolatum]] |-id=key-0-3 |3 |Achenes with 2 abaxial grooves, 1 abaxial ridge; leaves submersed, ribbonlike, or if emersed, blades linear-lanceolate to narrowly elliptic. |[[A. gramineum|A. gramineum]] |-id=key-0-3 |3 |Achenes with1 abaxial groove; leaves emersed, rarely submersed or floating, blades ovate to elliptic. |[[#key-0-4| > 4]] |-id=key-0-4 |4 |Fruiting heads 2–4 mm diam.; achenes 1.5–2.2 mm; petals 1–3 mm. |[[A. subcordatum|A. subcordatum]] |-id=key-0-4 |4 |Fruiting heads 4.1–7 mm diam.; achenes 2.1–3 mm; petals 3.5–6 mm. |[[A. triviale|A. triviale]] |} </div></div><!-- -->{{#Taxon: name=Alisma |authority=Linnaeus |rank=genus |parent rank=family |synonyms= |basionyms= |family=Alismataceae |distribution=Widely distributed;nearly worldwide |reference=bj1968a;hendricks1957a;rubtzoff1964a;voss1958a |publication title=Sp. Pl. |publication year=1754 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/62857cf6bca5c4637d27b113da92d27dbf9962f4/V22/V22_229.xml |genus=Alisma |abaxial keel presence=absent |abaxial wing presence=absent |apex shape=acuminate;acuminate;obtuse;acute |base shape=attenuate;rounded |blade shape=linear;ovate |bract architecture or pubescence or relief=smooth |bract fragility=delicate |bract height or length or size=shorter |bract shape=lanceolate |corm presence=absent |filament pubescence=glabrous |filament shape=filiform |flower reproduction=bisexual |fruit shape=compressed |gland presence=absent |inflorescences panicle location=submersed;emersed |inflorescences panicle orientation=erect |lateral wing architecture or shape=2-3-ribbed |lateral wing presence=absent |leaf architecture=petiolate;sessile |margin architecture or shape=entire |marking coloration or reflectance=translucent |marking presence=absent |ovule quantity=1 |pattern shape=starlike |pedicel orientation=ascending |petal architecture or shape=entire |petal coloration=white;pink |petiole shape=triangular |pistil arrangement=not radiating |pistil fusion=distinct |pistil quantity=15;20 |receptacle shape=flattened;flattened |rhizome presence=absent |rib dehiscence or orientation=longitudinal |root architecture=not septate |sepal growth form or texture=herbaceous |sepal orientation=erect |sepal relief=not sculptured |stamen quantity=6;9 |stolon presence=absent |style position=lateral |surface architecture or pubescence or relief=smooth |tuber presence=absent |whole_organism architecture=floating-leaved |whole_organism duration=perennial |whole_organism growth form=herb |whole_organism location=emersed;submersed |whole_organism pubescence=glabrous |whorl quantity=2;10 |x chromosome quantity=7 }}<!-- -->[[Category:Treatment]][[Category:Alismataceae]] Templates used on this page: Template:Alismataceae (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) Template:Treatment/Reference (view source) Return to Alisma.