Eriocaulon setaceum L.
  • Sp. Pl.
  • Pinheirinho aquático


Cite taxon page as 'WFO (2020): Eriocaulon setaceum L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000413799. Accessed on: 04 Jul 2020'

General Information

Plants mostly submerged. Stems ca. 25 cm. Leaves filiform, 3--4 cm × ca. 0.2 mm, 1-veined. Scapes 5--15, to 11 cm, 6-ribbed; sheath 2--2.5 cm; receptacle subglabrous or villous; heads dusky, subglobose, ca. 2.5 × 3 mm; involucral bracts reflexed, straw-colored, ovate, ca. 1 mm, membranous, glabrous; floral bracts orbicular to oblanceolate, abaxially white clavate hairy toward apex or glabrous. Male flowers: sepals spathelike, abaxially shortly hairy toward (2 or)3-lobed apex, lobes truncate at apex; petals 3, elliptic to subulate, small, anterior one slightly larger than others, adaxially white clavate hairy, abaxially white clavate hairy toward apex, gland black, sometimes absent; anthers black. Female flowers: sepals 3, free, boatlike to obovate, abaxially white clavate hairy toward margin; petals 3, free, oblanceolate-linear, unequal, membranous, gland black, sometimes absent; ovary 3-loculed; style 3-cleft. Seeds narrowly ovoid, 0.3--0.4 mm; testa hexagonally reticulate, prickles 1 or 2 per cell, linear, slimy coated. Fl. and fr. Aug--Oct.

  • Provided by: [E].Flora Of CHina @ efloras.org
    • Source: [
    • 8
    • ]. 

    Morphology

    Floating aquatic

  • Provided by: [C].Plants Of the World Online Portal - FWTA
    • Source: [
    • 2
    • ]. 

    Capitula blackish, small, seldom exceeding 4 mm. diam.

  • Provided by: [C].Plants Of the World Online Portal - FWTA
    • Source: [
    • 2
    • ]. 

    Stems elongate, clothed with numerous filiform leaves

  • Provided by: [C].Plants Of the World Online Portal - FWTA
    • Source: [
    • 2
    • ]. 

    Scapes generally numerous

  • Provided by: [C].Plants Of the World Online Portal - FWTA
    • Source: [
    • 2
    • ]. 

    Scapes up to 30 cm. high, 5–7-ribbed; sheaths shorter than the leaves, loose, parallel-sided, shortly 1–3-fid at the mouth.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Leaves filiform, yellow-green, flaccid, 3–10 cm. long, 0.1–0.3 mm. wide, 1-nerved, fenestrate, not sheathing at the base.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Aquatic; stem floating below the surface, slender, elongate, branching, up to 50 cm. or more long, densely clothed in numerous leaves, terminating in a stiff umbel of 1–20 scapes emergent above the water surface.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Seeds 0.4–0.5 mm. long, transversely white-papillose, mid-brown but often appearing blackish due to the adherent ovary-wall.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Capsule only very tardily dehiscent.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Female flowers: sepals subequal or the median smaller, deeply concave, the back gibbous with broadly rounded tip, spongy along the midline, infrequently lightly keeled and winged with a few white hairs on the upper keel and an acute tip, upper margins smooth or denticulate; petals subequal, linear-spathulate, rather spongy, glands small or absent, glabrous or a few white papillae at the tip; ovary black.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Male flowers: sepals oblong, concave, unequally connate into a spathe or almost free, glabrous or white papillose near the rounded tip; petals small, glandular; anthers 6, black.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Capitulum depressed-globose, (2–)3–5(–6) mm. diameter, blackish or white-pubescent; involucral bracts shorter than the capitulum width, blackish, scarious, obovate-oblong to suborbicular, broadly rounded, weakly reflexing at maturity; floral bracts cuneate-oblong, blackish, concave, acute, the inner sometimes white-papillose on the back; receptacle glabrous or thinly pilose; flowers trimerous, 0.9–1.4 mm. long, pedicellate, black.

  • Provided by: [B].Plants Of the World Online Portal - FTEA
    • Source: [
    • 7
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Amapí
    • Amazonas
    • Parí
    • Rondônia
    • Minas Gerais
    • São Paulo
    • Goiás
    • Mato Grosso

    Other Local Names

    NameLanguageCountry
    Pinheirinho aquáticoPortuguese

     Information From

    Eriocaulaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C The Trustees of the Royal Botanic Gardens, Kew
    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
    • D Group Brazil Flora, REFLORA Program
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • E Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).