View source for Rotala ← Rotala 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=Rotala |accepted_authority=Linnaeus |publications={{Treatment/Publication |title=Mant. Pl. |place=2: 143, 175. 1771 |year=1771 }} |common_names=Toothcup |basionyms= |synonyms= |hierarchy=Lythraceae;Rotala |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Lythraceae]]</div><div class="higher-taxon"><small>genus</small>[[Rotala]]</div></div> |etymology=Latin rota, wheel, alluding to whorled leaves of R. verticillaris Linnaeus |volume=Volume 10 |mention_page= |treatment_page= }}<!-- --><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual or perennial, terrestrial, amphibious, or aquatic, often turning pink or red, 0.4–4 dm, glabrous throughout. <b>Stems</b> erect, decumbent, or creeping [floating], unbranched or branched, often rooting at nodes. <b>Leaves</b> usually opposite, rarely whorled [subalternate], dimorphic or uniform; sessile or subsessile; blade obovate, orbiculate, oblong-elliptic, oblanceolate, subspatulate, or linear [lanceolate, spatulate], base attenuate, obtuse, or rounded, margins membranous or cartilaginous. <b>Inflorescences</b> indeterminate, terminal or axillary racemes, axillary spikes, or solitary flowers (on main stem). <b>Flowers</b> sessile or subsessile, actinomorphic, monostylous [distylous]; floral tube perigynous, campanulate; epicalyx segments shorter to longer than sepals or absent; sepals [3 or] 4[–6], to 1/2 floral tube length; petals caducous or persistent, 0 or 4[–6], rose, pink, or white [purple]; nectariferous tissue variably present at base of inner wall of floral tube; stamens (1–)4[–6], in 1 whorl; ovary 2–4-locular; placenta globose, ultimately nearly free-central; style slender or stout; stigma capitate or thick-capitate. <b>Fruits</b> capsules, walls thin and dry, finely, transversely striate (10\×), 2–4-valved, dehiscence septicidal. <b>Seeds</b> 30–100+, obovoid-semiovoid, convex-concave, 0.3–0.5 mm; cotyledons ± complanate. <b>x</b> = 8.</span><!-- -->{{Treatment/Body |distribution=North America;Mexico;West Indies;Central America;South America;Europe;s Asia;Africa. |discussion=<p>Species ca. 50 (3 in the flora).</p><!-- --><p>The native Rotala ramosior and introduced R. indica and R. rotundifolia are weeds in North American rice fields, irrigation ditches and canals, and other disturbed wet areas. Rotala ramosior is increasingly found elsewhere in the world in rice-growing regions. The genus often grows with one or more species of the superficially similar Ammannia (S. A. Graham et al. 2011). Some species of Rotala are part of the international aquatic plant trade.</p> |tables= |references= }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Inflorescences terminal racemes, simple or compound; leaves dimorphic, aerial blades obovate to orbiculate, submerged blades linear to orbiculate; style stout; stigmas thick-capitate. |[[Rotala rotundifolia|Rotala rotundifolia]] |-id=key-0-1 |1 |Inflorescences terminal or axillary racemes, axillary spikes, or solitary flowers; leaves monomorphic, blades oblong-elliptic, oblanceolate, obovate to oblong, or subspatulate; style slender; stigmas capitate, not excessively thickened. |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Margins of leaves white-cartilaginous, blades obovate to oblong or subspatulate; flowers frequently in short axillary spikes or terminal or axillary racemes, sometimes solitary in axils of main stems; epicalyx segments absent. |[[Rotala indica|Rotala indica]] |-id=key-0-2 |2 |Margins of leaves membranous, blades oblong-elliptic to oblanceolate; flowers solitary in axils of main stems; epicalyx segments present. |[[Rotala ramosior|Rotala ramosior]] |} </div></div><!-- -->{{#Taxon: name=Rotala |author=Shirley A. Graham |authority=Linnaeus |rank=genus |parent rank=family |synonyms= |basionyms= |family=Lythraceae |distribution=North America;Mexico;West Indies;Central America;South America;Europe;s Asia;Africa. |reference=None |publication title=Mant. Pl. |publication year=1771 |special status= |source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/1f4bf54ae2f7dbd5376c45b4fe1b388e15b53086/coarse_grained_fna_xml/V10/V10_554.xml |genus=Rotala }}<!-- -->[[Category:Treatment]][[Category:Lythraceae]] Templates used on this page: Template:Lythraceae (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 Rotala.