Arenaria lanuginosa (Michx.) Rohrb.
  • Fl. Bras.
  • Spreading sandwort


Cite taxon page as 'WFO (2019): Arenaria lanuginosa (Michx.) Rohrb. Published on the Internet; http://www.worldfloraonline.org/taxon/wfo-0000546100. Accessed on: 21 Oct 2019'

General Information

Plants ± strongly perennial, pos-sibly blooming first year, not matted. Taproots filiform to moderately thickened; rhizomes often present, slender, 2-15+ cm. Stems 1-80+, erect or ascending to procumbent or prostrate to trailing, green, 5-60 cm; internodes terete to angular, 1/ 3-8+ times as long as leaves, dull, retrorsely pubescent throughout or in lines, hairs minute. Leaves usually connate basally, with scarious sheath 0.1-0.5 mm, occasionally petiolate (proximal leaves) or sessile; petiole 2-5 mm; blade 1-veined, vein prominent abaxially, linear-lanceolate to narrowly elliptic or oblanceolate, 3-35 × 2-14 mm, herbaceous, margins thickened, scarious, shiny, ciliate proximally or throughout, apex obtuse or acute to apiculate, often minutely pustulate, ciliate on margins and adaxial midrib; axillary leaf clusters absent. Inflorescences axillary, solitary flowers or in proliferating, mostly terminal, leafy, 1-80+-flowered cymes. Pedicels erect to ascending (often arcuately so), or straight to widely divergent, often hooked distally in fruit, 2-40 mm, retrorsely pubescent. Flowers: sepals green, 1-3-veined, 2 lateral veins 4-3/ 4 times as long as midvein, often appearing prominently keeled proximally, lanceolate to ovate (herbaceous portion oblong or lanceolate to ovate), 2-5 mm, to 5.5 mm in fruit, apex acute to acuminate, not pustulate, glabrous; petals narrowly spatulate to obovate, 1.5-6 mm, 2-1 5 times as long as sepals or absent, apex obtuse to rounded, petals sometimes absent. Capsules ± loosely to tightly enclosed by calyx, ovoid, 3-6 mm, 5-1 2 times as long as sepals. Seeds 8-35, black, suborbicular, slightly compressed, 0.7-0.8 mm, shiny, smooth. 2n = 40, 44.

  • Provided by: [F].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    Arenaria lanuginosa (Michx.) Rohrb. in Mart., Fl. Bras. 14(2): 274. 1872; Spergulastrum lanuginosum Michx.

    Hierbas perennes, tallos decumbentes, ramificados en la base y hacia arriba, generalmente 10–40 cm de largo, cortamente pilosos o a veces largamente pilosos o glabros; entrenudos generalmente tan largos como las hojas o más largos. Hojas opuestas, lineares o lanceoladas (raramente ovadas), 5–30 mm de largo y 2–10 mm de ancho, ápice agudo o acuminado, delgadas, glabras a pilosas especialmente en la nervadura central y los márgenes, papilosas; estipulas ausentes. Flores solitarias, axilares, pedicelos 5–30 mm de largo, menudamente pilosos; sépalos 5, lanceolados a ovados, 2–7 mm de largo, agudos o acuminados, a veces ciliados en la base, margen escarioso, glabros o pilosos, frecuentemente papilosos y algo carinados; pétalos 5, inconspicuos, enteros, hasta 2/3 de la longitud de los sépalos, blancos; estambres 10; estilos 3, libres. Cápsula madura 3–4 mm de largo, sobrepasando al cáliz, con 6 valvas que se separan rápidamente, tornándose escariosas, ápices agudos, recurvados; semillas maduras lisas, la medida máxima ca 1 mm, comprimidas, café-negro lustrosas.

    Frecuente en bosques de pino-encinos y nebliselvas, zona norcentral; (160–) 950–1500 m; fl y fr durante todo el año; Moreno 11008, Stevens 21029; sureste de Estados Unidos, en las montañas de México a Sudamérica y en las Antillas. Un género con ca 250 especies del hemisferio norte y montañas de Sudamérica. En otros sitios se han reconocido varios taxones infraespecíficos de A. lanuginosa. El complejo de esta especie requiere un estudio de las poblaciones a lo largo de su extensión geográfica para que la separación de taxones pueda hacerse con seguridad. Las plantas nicaragüenses son relativamente uniformes.

  • Provided by: [E].Flora de Nicaragua
    • Source: [
    • 2
    • ]. 

    "Lax perennial; stem retrorsely puberulent, to 5 dm; lvs narrowly lance-elliptic or elliptic-oblanceolate, 15–30 × 2–8 mm, ± pustulate, ciliate at base; pedicels axillary, slender, mostly 1.5–4 cm, ascending to reflexed, puberulent; sep lanceolate, 3–4 mm, acute or acutish, 1-nerved, glabrous, often pustulate, sometimes ciliolate at base; pet minute or usually none; seed 0.6–0.8 mm, flattened, somewhat keeled dorsally, smooth, shining, black or dark reddish-black; 2n=44. Open woodlands and rocky places or damp thickets; se. Va. to Ark., s. to tropical Amer. Our plants are var. lanuginosa."

  • Provided by: [G].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Distribution Map

     
    • Introduced distribution
    Introduced into
    • Southern America Brazil Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Minas Gerais
    • Rio de Janeiro
    • São Paulo

    Synonyms

    Other Local Names

    NameLanguageCountry
    Spreading sandwort

     Information From

    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
    • A Group Brazil Flora, REFLORA Program
    Caryophyllaceae
    World Flora Online Data. 2017.
    • B CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • C Missouri Botanical Garden
    • D Missouri Botanical Garden
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • E Missouri Botanical Garden
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • F Flora of North America Association
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • G Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • H CC0 1.0 Universal (CC0 1.0).