Sagittaria montevidensis Cham. & Schltdl.
  • Linnaea 2: 156 (1827) 
  • Sagittaire spongieuse


Cite taxon page as 'WFO (2025): Sagittaria montevidensis Cham. & Schltdl. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000738022. Accessed on: 04 Jun 2025'

Local Descriptions

Order descriptions by:

General Information

6. Sagittaria montevidensis Cham. et Schldl., Linnaea 2: 156 (1827). Neotipo (designado por Rataj, 1972): Argentina, Lorentz 103 (W).

Por A. Lot H. y A. Novelo R.

  • Provided by: [D].Flora Mesoamericana
    • Source: [
    • 2
    • 7
    • ]. 

    Herbs, annual or perennial, to 100 cm; rhizomes present; stolons present; corms present. Leaves submersed and emersed; submersed leaves absent or phyllodial, flattened, to 17 ´ 2 cm; emersed leaves with petiole triangular, 21--55 cm, blade hastate to sagittate, 2.5--17.5 ´ 0.6--22 cm, lobes longer than or equal to remainder of blade. Inflorescences racemes or panicles, of 1--15 whorls, floating or emersed, 1.5--28 ´ 1.5--15 cm; peduncles 15--47 cm; bracts distinct or connate less than ¼ total length, lanceolate to elliptic, 4--34 mm, delicate, not papillose; fruiting pedicels recurved, club-shaped, 0.5--4.2 cm. Flowers 2--5 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, with or without ring of sterile stamens. Fruiting heads 1.2--2.1 cm diam.; achenes oblanceoloid, not abaxially keeled, 2--4.3 ´ 0.7--1.5 mm, beaked; faces not tuberculate, wings absent, glands 1; beak lateral, horizontal, 0.4--0.8 mm.

  • Provided by: [F].Flora of North America @ efloras.org
    • Source: [
    • 6
    • ]. 

    Fibrous-rooted annual, or perennial with short, thick rhizome. Leaves exceedingly variable, emersed, floating or submerged, typically emersed, prominently veined and sagittate, the blades linear to widely ovate, 2-20 x 0.4-25 cm, the linear to ovate, divergent lobes 2-20 x 0.3-15 cm, occasionally reduced or absent, the floating leaves ovate, to 2.5 x 1.5 cm, the submerged leaves reduced to phyllodia 3-45 x 0.4-1.2 cm, occasionally with spatulate ends to 1.5 cm wide, the petioles 8-70 cm long. Scape 7-75 cm long, with 2-12 whorls of flowers, simple or branching from the lowest whorl. Bracts connate, 0.2-2.5 cm long, membranous or occasionally thickened, the tips attenuate or reduced. Pistillate flowers with thickened, recurved pedicels 1-7 cm long; sepals broadly ovate, 0.6-1.5 x 0.6-1.5 cm, closely appressed to the mature receptacle; petals ovate, to 2.2 cm long, white or with purple marking at the base; ring of 9-12 functional stamens occasionally present. Staminate flowers with filiform divaricate pedicels 1-4 cm long; stamens 12-[infinity], with linear or dilated, glabrous or pubescent filaments 0.7-3.5 mm long, the obolong anthers 0.4-1.3 mm long. Mature pistillate heads 0.7-2.5 cm in diameter; achenes narrowly winged, 1.5-3 x 0.6-1.5 mm, the faces with a single short resin duct, or unadorned, the laterally or obliquely inserted beak 0.3-0.9 mm long. Annual or Perennial. Leaves emersed, floating or submerged, the emersed sagittate, only rarely without basal lobes, the submerged reduced to linear phyllodia to 45 cm long and 0.5 cm wide, the floating with ovate blades. Scape with 3-12 whorls of flowers, simple or branching at the lowest whorl. Bracts connate, the free ends obtuse or acute, typically less than 1 cm long, occasionally to 2 cm long. Pistillate flowers with thickened recurved pedicels (1-) 2.5-7.5 cm long; sepals covering about one-half the receptacle at maturity; a ring of functional stamens usually present. Stamens with linear pubescent filaments 1-2 mm long. Mature pistillate heads 1-2.5 cm in diameter; achenes 2-2.5 x 0.9-1.3 mm, the resin duct typically present.

  • Provided by: [C].Memoirs of the New York Botanical Garden
    • Source: [
    • 9
    • ]. 

    Perennial herbs from rhizomes, glabrous, to 100 cm tall; rhizomes to 8 cm long cm long, to 6 cm diam. Leaves submersed and emersed; submersed leaves sessile, pale green, linear, to 17 cm long, to 2 cm wide, the veins 1-3, the apex round-acute, the basal lobes absent; emersed leaves petiolate, the petioles semi-terete to terete, 21-55 cm long, 0.3-2.5 cm wide, the basal sheath 5-17 cm long, the blades pale green, hastate to sagittate, 2.5-17.5 cm long, 0.6-22 cm wide, the veins 7-20, the apex acute, the basal lobes present, 1.5-18.7 cm long, the tips separated by 142.7 cm, with 3-6 veins. Inflorescence a simple or paniculate scape of 1-15 whorls, floating or emersed, 1.5-28 cm long, 1.5-15 cm wide, the whorls with 3 flowers; peduncles terete, 15-47 cm long, 0.2-1.3 cm diam.; staminate bracts separate or united, lanceolate to elliptic, delicate, 0.5-3.1 cm long, the apex obtuse to round-acute; carpellate bracts separate or united, lanceolate, delicate to slightly coarse, 0.4-3.4 cm long, the apex obtuse to acute; staminate pedicels spreading to erect, cylindric, 0.5-3.4 cm long, 0.2-1 mm diam.; carpellate pedicels spreading and cylindric in flower, reflexed and clavate in fruit, 0.8-4.2 cm long, 1-11 mm diam. Staminate flowers with or without sterile carpels, the sepals ascending, 7.6-12 mm long, 3-6 mm wide, the petals clawed, 1-2.5 cm long, 0.5-2.5 cm wide, the claws ca. 4 mm long, the stamens 20-30, the filaments glabrous or weakly pubescent, cylindric, 1.2-7.5 mm long, 0.3-0.5 mm diam., the anthers linear, 1-2.5 mm long, 0.3-1 mm wide, the apex obtuse to round-acute; carpellate flowers with or without ring of sterile stamens, the sepals ascending in flower and fruit, 3.5-12 mm long, 2-9.5 mm wide, the petals with or without purple spot at base, clawed, 1.25-2.5 cm long, 0.5-3, the claw ca. 2 mm long. Fruit aggregate 1.2-2.1; achenes oblanceolate, beaked, without keel, 2-4.3 mm long, 0.7-1.5 mm wide, the faces etuberculate, with 1 gland, the beak lateral, horizontal, 0.4-0.8 mm long.

  • Provided by: [H].Flora Neotropica
    • Source: [
    • 11
    • ]. 

    Morphology

    Root: type adventicious. Stem: type rhizome; form cylindric. Leaf: form emerged petiolate/elliptic/ovate/sagittate; venation acrodromous/campylodromous; petiole cylindric. Inflorescence: flower disposition lower whorl with female flower and upper whorl with male flower; form paniculate; rachis erect; whorl not constricted. Flower: diclinous male/female; sepal adpressed membranous/ovate; petal claw; colour white; stamen numerous glabrous; carpel numerous. Fruit: aggregate of the achene with adpressed sepal; achene flattened winged obovate keeled surface muricate/beak lateral. Seed: colour yellowish brown. Raiz: tipo adventícia(s). Caule: tipo rizoma(s); forma cilíndrico(s). Folha: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervação acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescência: flor(es) disposição inferior(es) verticilo(s) com feminina(s) flor(es) e superior(es) verticilo(s) com estaminada(s) flor(es); forma paniculada(s); raque ereta(s); verticilo(s) não constrito(s). Flor: díclina(s) estaminada(s)/feminina(s); sépala(s) adpressa(s) membranácea(s)/ovada(s); pétala(s) unha(s); cor branca; estame(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquênio(s) com adpressa(s) sépala(s); aquênio(s) achatado(s) alado(s) obovado(s) quilhado superfície(s) muricada(s)/bico(s) lateral(ais). Semente: cor amarelada castanha. Raiz: tipo adventícia(s). Tallo: tipo rizoma(s); forma cilíndrico(s). Hoja: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervación acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescencia: flor(es) disposición inferior(es) verticilo(s) con femenina(s) flor(es) y superior(es) verticilo(s) con estaminada(s) flor(es); forma paniculada(s); raquis erecta(s); verticilo(s) no constricto(s). Flor: díclina(s) estaminada(s)/femenina(s); sépala(s) adpresa(s) membranacea(s)/ovada(s); pétala(s) uña(s); color blanca; estambre(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquenio(s) con adpresa(s) sépala(s); aquenio(s) chato(s) alado(s) obovado(s) quillado superficie(s) muricada(s)/pico(s) lateral(es). Semilla: color amarillenta marron.

  • Provided by: [G].Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    • Source: [
    • 1
    • ]. 

    Annual or perennial aquatic herb. Leaves erect, floating or submerged; blade of erect leaves linear to broadly ovate, 0.5–25 × 2–20 cm., sagittate, with the lobes up to 20 cm. long, rarely reduced or absent; blade of floating leaves ovate, up to 1.5 × 2.5 cm.; submerged leaves reduced to phyllodes, up to 45 cm. long. Petals larger, up to 2.2 cm. long, white, sometimes with a purple mark at the base. Stamens of ♂ flowers 12–∞; filaments linear or flattened, glabrous or pubescent, 0 .7–3.5 mm. long; anthers oblong, 0.4–1.3 mm. long; ♀ flowers occasionally with a ring of 9–12 functional stamens. Peduncle erect, 7–75 cm. high, with 2–12 whorls of flowers, the lowest sometimes of branches; bracts connate at their bases, up to 2.5 cm. long, membranous or sometimes thickened; pedicels of ♂ flowers 1–4 cm. long; pedicels of ♀ flowers thickened, recurved, 1–7 cm. long. Sepals ovate, 0.6–1.5 × 0 .6–1.5 cm., appressed in the female flowers. Abortive carpels in ♂ flowers about as many as stamens, 1.5 × 0.5 mm.; carpels in ♀ flowers ∞, 2 × 1 mm. Fruiting head up to 2.5 cm. in diameter; achenes up to 1.5 × 3 mm. with a beak up to 1 mm. long.

  • Provided by: [E].Plants Of the World Online Portal - FTEA
    • Source: [
    • 5
    • ]. 

    Distribution

    United States, western slopes of the Appalachians, south of the Great Lakes, westward and southward to Northern Mexico and California, absent from the Rocky Mountains and the Gulf states east of Louisiana.

  • Provided by: [C].Memoirs of the New York Botanical Garden
    • Source: [
    • 9
    • ]. 

    Eastern North America and northern Mexico; then Ecuador and Peru to southeastern Brazil, Uruaguay, and northern Chile.

  • Provided by: [H].Flora Neotropica
    • Source: [
    • 11
    • ]. 
    Flora NeotropicaDistribution

    Eastern North America and northern Mexico; then Ecuador and Peru to southeastern Brazil, Uruaguay, and northern Chile.

    General Information

    Perennial herbs from rhizomes, glabrous, to 100 cm tall; rhizomes to 8 cm long cm long, to 6 cm diam. Leaves submersed and emersed; submersed leaves sessile, pale green, linear, to 17 cm long, to 2 cm wide, the veins 1-3, the apex round-acute, the basal lobes absent; emersed leaves petiolate, the petioles semi-terete to terete, 21-55 cm long, 0.3-2.5 cm wide, the basal sheath 5-17 cm long, the blades pale green, hastate to sagittate, 2.5-17.5 cm long, 0.6-22 cm wide, the veins 7-20, the apex acute, the basal lobes present, 1.5-18.7 cm long, the tips separated by 142.7 cm, with 3-6 veins. Inflorescence a simple or paniculate scape of 1-15 whorls, floating or emersed, 1.5-28 cm long, 1.5-15 cm wide, the whorls with 3 flowers; peduncles terete, 15-47 cm long, 0.2-1.3 cm diam.; staminate bracts separate or united, lanceolate to elliptic, delicate, 0.5-3.1 cm long, the apex obtuse to round-acute; carpellate bracts separate or united, lanceolate, delicate to slightly coarse, 0.4-3.4 cm long, the apex obtuse to acute; staminate pedicels spreading to erect, cylindric, 0.5-3.4 cm long, 0.2-1 mm diam.; carpellate pedicels spreading and cylindric in flower, reflexed and clavate in fruit, 0.8-4.2 cm long, 1-11 mm diam. Staminate flowers with or without sterile carpels, the sepals ascending, 7.6-12 mm long, 3-6 mm wide, the petals clawed, 1-2.5 cm long, 0.5-2.5 cm wide, the claws ca. 4 mm long, the stamens 20-30, the filaments glabrous or weakly pubescent, cylindric, 1.2-7.5 mm long, 0.3-0.5 mm diam., the anthers linear, 1-2.5 mm long, 0.3-1 mm wide, the apex obtuse to round-acute; carpellate flowers with or without ring of sterile stamens, the sepals ascending in flower and fruit, 3.5-12 mm long, 2-9.5 mm wide, the petals with or without purple spot at base, clawed, 1.25-2.5 cm long, 0.5-3, the claw ca. 2 mm long. Fruit aggregate 1.2-2.1; achenes oblanceolate, beaked, without keel, 2-4.3 mm long, 0.7-1.5 mm wide, the faces etuberculate, with 1 gland, the beak lateral, horizontal, 0.4-0.8 mm long.

    Flora of North America @ efloras.orgGeneral Information

    Herbs, annual or perennial, to 100 cm; rhizomes present; stolons present; corms present. Leaves submersed and emersed; submersed leaves absent or phyllodial, flattened, to 17 ´ 2 cm; emersed leaves with petiole triangular, 21--55 cm, blade hastate to sagittate, 2.5--17.5 ´ 0.6--22 cm, lobes longer than or equal to remainder of blade. Inflorescences racemes or panicles, of 1--15 whorls, floating or emersed, 1.5--28 ´ 1.5--15 cm; peduncles 15--47 cm; bracts distinct or connate less than ¼ total length, lanceolate to elliptic, 4--34 mm, delicate, not papillose; fruiting pedicels recurved, club-shaped, 0.5--4.2 cm. Flowers 2--5 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, with or without ring of sterile stamens. Fruiting heads 1.2--2.1 cm diam.; achenes oblanceoloid, not abaxially keeled, 2--4.3 ´ 0.7--1.5 mm, beaked; faces not tuberculate, wings absent, glands 1; beak lateral, horizontal, 0.4--0.8 mm.

    Memoirs of the New York Botanical GardenDistribution

    United States, western slopes of the Appalachians, south of the Great Lakes, westward and southward to Northern Mexico and California, absent from the Rocky Mountains and the Gulf states east of Louisiana.

    General Information

    Fibrous-rooted annual, or perennial with short, thick rhizome. Leaves exceedingly variable, emersed, floating or submerged, typically emersed, prominently veined and sagittate, the blades linear to widely ovate, 2-20 x 0.4-25 cm, the linear to ovate, divergent lobes 2-20 x 0.3-15 cm, occasionally reduced or absent, the floating leaves ovate, to 2.5 x 1.5 cm, the submerged leaves reduced to phyllodia 3-45 x 0.4-1.2 cm, occasionally with spatulate ends to 1.5 cm wide, the petioles 8-70 cm long. Scape 7-75 cm long, with 2-12 whorls of flowers, simple or branching from the lowest whorl. Bracts connate, 0.2-2.5 cm long, membranous or occasionally thickened, the tips attenuate or reduced. Pistillate flowers with thickened, recurved pedicels 1-7 cm long; sepals broadly ovate, 0.6-1.5 x 0.6-1.5 cm, closely appressed to the mature receptacle; petals ovate, to 2.2 cm long, white or with purple marking at the base; ring of 9-12 functional stamens occasionally present. Staminate flowers with filiform divaricate pedicels 1-4 cm long; stamens 12-[infinity], with linear or dilated, glabrous or pubescent filaments 0.7-3.5 mm long, the obolong anthers 0.4-1.3 mm long. Mature pistillate heads 0.7-2.5 cm in diameter; achenes narrowly winged, 1.5-3 x 0.6-1.5 mm, the faces with a single short resin duct, or unadorned, the laterally or obliquely inserted beak 0.3-0.9 mm long. Annual or Perennial. Leaves emersed, floating or submerged, the emersed sagittate, only rarely without basal lobes, the submerged reduced to linear phyllodia to 45 cm long and 0.5 cm wide, the floating with ovate blades. Scape with 3-12 whorls of flowers, simple or branching at the lowest whorl. Bracts connate, the free ends obtuse or acute, typically less than 1 cm long, occasionally to 2 cm long. Pistillate flowers with thickened recurved pedicels (1-) 2.5-7.5 cm long; sepals covering about one-half the receptacle at maturity; a ring of functional stamens usually present. Stamens with linear pubescent filaments 1-2 mm long. Mature pistillate heads 1-2.5 cm in diameter; achenes 2-2.5 x 0.9-1.3 mm, the resin duct typically present. Annual or Perennial. Leaves emersed, floating or submerged, the emersed sagittate, only rarely without basal lobes, the submerged reduced to linear phyllodia to 45 cm long and 0.5 cm wide, the floating with ovate blades. Scape with 3-12 whorls of flowers, simple or branching at the lowest whorl. Bracts connate, the free ends obtuse or acute, typically less than 1 cm long, occasionally to 2 cm long. Pistillate flowers with thickened recurved pedicels (1-) 2.5-7.5 cm long; sepals covering about one-half the receptacle at maturity; a ring of functional stamens usually present. Stamens with linear pubescent filaments 1-2 mm long. Mature pistillate heads 1-2.5 cm in diameter; achenes 2-2.5 x 0.9-1.3 mm, the resin duct typically present.

    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020Morphology

    Root: type adventicious. Stem: type rhizome; form cylindric. Leaf: form emerged petiolate/elliptic/ovate/sagittate; venation acrodromous/campylodromous; petiole cylindric. Inflorescence: flower disposition lower whorl with female flower and upper whorl with male flower; form paniculate; rachis erect; whorl not constricted. Flower: diclinous male/female; sepal adpressed membranous/ovate; petal claw; colour white; stamen numerous glabrous; carpel numerous. Fruit: aggregate of the achene with adpressed sepal; achene flattened winged obovate keeled surface muricate/beak lateral. Seed: colour yellowish brown. Raiz: tipo adventícia(s). Caule: tipo rizoma(s); forma cilíndrico(s). Folha: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervação acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescência: flor(es) disposição inferior(es) verticilo(s) com feminina(s) flor(es) e superior(es) verticilo(s) com estaminada(s) flor(es); forma paniculada(s); raque ereta(s); verticilo(s) não constrito(s). Flor: díclina(s) estaminada(s)/feminina(s); sépala(s) adpressa(s) membranácea(s)/ovada(s); pétala(s) unha(s); cor branca; estame(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquênio(s) com adpressa(s) sépala(s); aquênio(s) achatado(s) alado(s) obovado(s) quilhado superfície(s) muricada(s)/bico(s) lateral(ais). Semente: cor amarelada castanha. Raiz: tipo adventícia(s). Tallo: tipo rizoma(s); forma cilíndrico(s). Hoja: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervación acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescencia: flor(es) disposición inferior(es) verticilo(s) con femenina(s) flor(es) y superior(es) verticilo(s) con estaminada(s) flor(es); forma paniculada(s); raquis erecta(s); verticilo(s) no constricto(s). Flor: díclina(s) estaminada(s)/femenina(s); sépala(s) adpresa(s) membranacea(s)/ovada(s); pétala(s) uña(s); color blanca; estambre(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquenio(s) con adpresa(s) sépala(s); aquenio(s) chato(s) alado(s) obovado(s) quillado superficie(s) muricada(s)/pico(s) lateral(es). Semilla: color amarillenta marron. Raiz: tipo adventícia(s). Caule: tipo rizoma(s); forma cilíndrico(s). Folha: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervação acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescência: flor(es) disposição inferior(es) verticilo(s) com feminina(s) flor(es) e superior(es) verticilo(s) com estaminada(s) flor(es); forma paniculada(s); raque ereta(s); verticilo(s) não constrito(s). Flor: díclina(s) estaminada(s)/feminina(s); sépala(s) adpressa(s) membranácea(s)/ovada(s); pétala(s) unha(s); cor branca; estame(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquênio(s) com adpressa(s) sépala(s); aquênio(s) achatado(s) alado(s) obovado(s) quilhado superfície(s) muricada(s)/bico(s) lateral(ais). Semente: cor amarelada castanha. Raiz: tipo adventícia(s). Tallo: tipo rizoma(s); forma cilíndrico(s). Hoja: forma emersa(s) peciolada(s)/elíptica(s)/ovada(s)/sagitada(s); nervación acródroma(s)/campilódromo(s); pecíolo(s) cilíndrico(s). Inflorescencia: flor(es) disposición inferior(es) verticilo(s) con femenina(s) flor(es) y superior(es) verticilo(s) con estaminada(s) flor(es); forma paniculada(s); raquis erecta(s); verticilo(s) no constricto(s). Flor: díclina(s) estaminada(s)/femenina(s); sépala(s) adpresa(s) membranacea(s)/ovada(s); pétala(s) uña(s); color blanca; estambre(s) numeroso(s) glabro(s); carpelo(s) numeroso(s). Fruto: agregado(s) de aquenio(s) con adpresa(s) sépala(s); aquenio(s) chato(s) alado(s) obovado(s) quillado superficie(s) muricada(s)/pico(s) lateral(es). Semilla: color amarillenta marron.

    Habitat

    Aquática

    Habit

    Erva

    Flora MesoamericanaGeneral Information

    6. Sagittaria montevidensis Cham. et Schldl., Linnaea 2: 156 (1827). Neotipo (designado por Rataj, 1972): Argentina, Lorentz 103 (W).

    Por A. Lot H. y A. Novelo R.

    Plants Of the World Online Portal - FTEAMorphology

    Annual or perennial aquatic herb. Leaves erect, floating or submerged; blade of erect leaves linear to broadly ovate, 0.5–25 × 2–20 cm., sagittate, with the lobes up to 20 cm. long, rarely reduced or absent; blade of floating leaves ovate, up to 1.5 × 2.5 cm.; submerged leaves reduced to phyllodes, up to 45 cm. long. Petals larger, up to 2.2 cm. long, white, sometimes with a purple mark at the base. Stamens of ♂ flowers 12–∞; filaments linear or flattened, glabrous or pubescent, 0 .7–3.5 mm. long; anthers oblong, 0.4–1.3 mm. long; ♀ flowers occasionally with a ring of 9–12 functional stamens. Peduncle erect, 7–75 cm. high, with 2–12 whorls of flowers, the lowest sometimes of branches; bracts connate at their bases, up to 2.5 cm. long, membranous or sometimes thickened; pedicels of ♂ flowers 1–4 cm. long; pedicels of ♀ flowers thickened, recurved, 1–7 cm. long. Sepals ovate, 0.6–1.5 × 0 .6–1.5 cm., appressed in the female flowers. Abortive carpels in ♂ flowers about as many as stamens, 1.5 × 0.5 mm.; carpels in ♀ flowers ∞, 2 × 1 mm. Fruiting head up to 2.5 cm. in diameter; achenes up to 1.5 × 3 mm. with a beak up to 1 mm. long. Leaves erect, floating or submerged; blade of erect leaves linear to broadly ovate, 0.5–25 × 2–20 cm., sagittate, with the lobes up to 20 cm. long, rarely reduced or absent; blade of floating leaves ovate, up to 1.5 × 2.5 cm.; submerged leaves reduced to phyllodes, up to 45 cm. long. Petals larger, up to 2.2 cm. long, white, sometimes with a purple mark at the base. Stamens of ♂ flowers 12–∞; filaments linear or flattened, glabrous or pubescent, 0 .7–3.5 mm. long; anthers oblong, 0.4–1.3 mm. long; ♀ flowers occasionally with a ring of 9–12 functional stamens. Peduncle erect, 7–75 cm. high, with 2–12 whorls of flowers, the lowest sometimes of branches; bracts connate at their bases, up to 2.5 cm. long, membranous or sometimes thickened; pedicels of ♂ flowers 1–4 cm. long; pedicels of ♀ flowers thickened, recurved, 1–7 cm. long. Sepals ovate, 0.6–1.5 × 0 .6–1.5 cm., appressed in the female flowers. Abortive carpels in ♂ flowers about as many as stamens, 1.5 × 0.5 mm.; carpels in ♀ flowers ∞, 2 × 1 mm. Fruiting head up to 2.5 cm. in diameter; achenes up to 1.5 × 3 mm. with a beak up to 1 mm. long.

    Distribution Map

     
    • Native distribution
    • Introduced distribution
    Found in
    • Northern America Eastern Canada New Brunswick
    • Mexico Mexico Northeast
    • Mexico Northwest
    • Mexico Southeast
    • North-Central U.S.A. Illinois
    • Iowa
    • Kansas
    • Minnesota
    • Missouri
    • Nebraska
    • Oklahoma
    • South Dakota
    • Wisconsin
    • Northeastern U.S.A. Connecticut
    • Indiana
    • Maine
    • Masachusettes
    • Michigan
    • New Hampshire
    • New Jersey
    • New York
    • Ohio
    • Pennsylvania
    • West Virginia
    • Northwestern U.S.A. Colorado
    • South-Central U.S.A. New Mexico
    • Texas
    • Southeastern U.S.A. Alabama
    • Arkansas
    • Delaware
    • Georgia
    • Kentucky
    • Louisiana
    • Maryland
    • Mississippi
    • North Carolina
    • South Carolina
    • Tennessee
    • Virginia
    • Southwestern U.S.A. California
    • Southern America Brazil Acre
    • Brazil South
    • Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Brazil Southeast
    • Espirito Santo
    • Minas Gerais
    • Rio de Janeiro
    • São Paulo
    • Brazilia Distrito Federal
    • Goiás
    • Mato Grosso
    • Mato Grosso do Sul
    • Southern South America Argentina Northeast
    • Argentina Northwest
    • Chile Central
    • Chile South
    • Paraguay
    • Uruguay
    • Western South America Bolivia
    • Ecuador
    • Peru
    Introduced into
    • Africa East Tropical Africa Tanzania
    • Asia-Tropical Malesia Jawa
    • Europe Southwestern Europe Spain
    • Northern America Southeastern U.S.A. Florida
    • Southern America Caribbean Leeward Is.

    Other Local Names

    NameLanguageCountry
    Sagittaire spongieuse

     Information From

    Alismataceae
    https://powo.science.kew.org/
    World Flora Online Data. 2022.
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    World Flora Online Data. 2024.
    • B Missouri Botanical Garden
    Memoirs of the New York Botanical Garden
    World Flora Online Data. 2024.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Mesoamericana
    World Flora Online Data. 2024.
    • D Missouri Botanical Garden
    Plants Of the World Online Portal - FTEA
    World Flora Online Data. 2024.
    • E
    Flora of North America @ efloras.org
    World Flora Online Data. 2024.
    • F Flora of North America Association
    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    http://floradobrasil.jbrj.gov.br
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • G Group Brazil Flora, REFLORA Program
    Flora Neotropica
    World Flora Online Data. 2024.
    • H Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    The World Checklist of Vascular Plants (WCVP)
    https://www.kew.org/
    The World Checklist of Vascular Plants (WCVP) Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; https://doi.org/10.34885/jdh2-dr22 Retrieved 28 September 2023.
    • I All Rights Reserved
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2024.
    • J All Rights Reserved
    • K CC0 1.0 Universal (CC0 1.0).