Lamium amplexicaule L.
  • Sp. Pl.


Cite taxon page as 'WFO (2020): Lamium amplexicaule L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000222440. Accessed on: 24 Oct 2020'

General Information

Herbs annual or biennial. Stems to 30 cm, much branched at base, ascending, subglabrous. Upper leaves sessile; petiole of basal leaves at least as long as blade; leaf blade circular to reniform, 1-2 × 0.7-1.5 cm, sparsely strigose, base truncate to broadly truncate-cuneate, semi-clasping, margin deeply crenate to almost palmately lobed, apex rounded. Verticillasters 6-10-flowered; bracts ca. 4 × 0.3 mm, ciliate. Calyx tubular-campanulate, 4-5 × 1.7-2 mm, densely villous, glabrous except for white villous apically inside; teeth lanceolate-subulate, 1.5-2 mm, margin ciliate. Corolla purple-red or reddish, ca. 1.7 cm, puberulent; tube ca. 1.3 cm, throat ca. 3 mm wide, annulus absent; upper lip densely purple-red pubescent on outside, straight, oblong, ca. 4 mm, apex slightly curved; lower lip slightly longer; middle lobe obcordate, 2-lobulate. Filaments glabrous; anthers hirsute. Nutlets grayish yellow, obovoid, triquetrous, constricted at base, ca. 2 × 1 mm, white tuberculate. Fl. Mar-May, fr. Jul-Aug.

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

    1. Lamium amplexicaule L., Sp. Pl. 579(1753). Lectotipo (designado porHedge y Lamond, (1968): “Habitat in Europae cultis”, Anon. (microficha MO! ex LINN-733.12). Ilustr.: Wu y Raven, Fl. China Ill. 17: t. 224 (1998).

    Por A. Pool.

    Hierbasanuales o bienales hasta 30 cm, erectas o decumbentes; tallos glabros oglabrescentes en la base, adpreso-pubescentes hacia el ápice. Hojas 1-2 × 0.7-2cm, romboides a circulares o reniformes, la base de las hojas caulinarestruncada o subcordata y luego cuneada, la base de las hojas florales cuneada,los márgenes profunda y irregularmente crenados a lobados, el ápice obtuso aredondeado; pecíolos de las hojas caulinares 1-2.5 cm, las hojas floralessésiles y amplexicaules. Inflorescencias de verticilastros, los verticilastroscon 12-20 flores, remotas en la base y condensadas apicalmente; brácteas ybractéolas ausentes. Cáliz florífero 3.5-5 × 0.9-2 mm, tubular, peloso conalgunos tricomas capitado-glandulares, los lobos 1.5-2 mm, subiguales,angostamente lanceolados a subulados; cáliz fructífero escasamente acrescente,campanulado. Corola color lavanda, púrpura o rojo-púrpura; tubo 10-15 mm,recto, el anillo ausente; labios 2-4 mm, el labiosuperior entero a ondulado. Nuececillas 2-2.5 × 1-1.25 mm. Floración ene., may.Áreas alteradas. Ch (Breedlove 32016, MO). 2000-2200 m.(Canadá, Estados Unidos, México, Mesoamérica, Ecuador, Perú, Bolivia, Paraguay,Chile, Argentina, Bermudas, Europa, Asia, África, Australia; nativa de Europa,Asia y N. África, introducida y algunas veces naturalizada en áreas templadas ymontañosas del Nuevo Mundo.)

    Mennema (1989) reconoció 5 variedades de Lamium amplexicaule; sólo la variedad L. amplexicaule var. amplexicaule se conoce fuera de Europa y Asia. Mennema (1989)registró que flores más pequeñas cleistógamas se encuentran algunas vecesademás de las flores normales casmógamas.

  • Provided by: [D].Flora Mesoamericana
    • Source: [
    • 3
    • 1
    • ]. 

    "Annual 1–4 dm from a short taproot, generally branched at the base, the several weak stems decumbent below; herbage inconspicuously hairy or subglabrous; proper lvs restricted to the lower part of the stem, petiolate, with broad, rounded, ± cordate, coarsely crenate or lobulate blade seldom 1.5(–2) cm; lvs subtending the fl-clusters sessile, broad-based, clasping, often 1.5(–2.5) cm, surpassing the cals but usually surpassed by the cors; verticils few and (except sometimes the upper) mostly well spaced, the lowest fully developed one often borne at or below the middle of the stem; lowest verticil sometimes few-fld and subtended by petiolate lvs; cal hirsute, 5–8 mm, the narrow,erect lobes about equaling the tube; cor purplish, 12–18 mm, glabrous inside, hairy outside, the tube straight; upper lip 3–5 mm, with purple hairs; occasional plants produce small, cleistogamous fls; 2n=18. A weed in fields and waste places, especially in fertile soil; native to Eurasia and n. Africa, now well established in our range and elsewhere in Amer. Mar.–Nov."

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 4
    • ]. 

    Morphology

    Annual soft herb, freely branched from the base; stems ascending or decumbent, 0.1-0.3(-0.4) m long. Leaves petiolate; blade subrotund to reniform, 10-25 mm long and equally broad, sparingly to fairly densely pubescent, apex rounded, base cordate to truncate, margin coarsely and often deeply crenate or lobed; petiole 15-40 mm long. Inflorescence of 2-6 verticillasters, spaced below, crowded above; verticillasters 3-10-flowered; bracts clasping, broader than long, resembling the leaves. Calyx villous, 6 mm long, 5-toothed; teeth lanceolate-subulate, 2.5 mm long, not spinescent. Corolla purple to whitish, 15-16 mm long in normal flowers (cleistogamic flowers much shorter); tube slender, 9-11 mm long, exannulate; upper lip 4-5 mm long; lower lip 3 mm long. Nutlets smooth, often mottled, 2 mm long.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 5
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    Annual herb, 100-400 mm high. Leaves petiolate; blade subrotund to reniform, 10-25 mm long, apex rounded, base cordate to truncate, margins coarsely and deeply crenate or lobed; petioles 15-40 mm long. Flowers: in 2-6 verticillasters, spaced below, crowded above, verticillasters 3-10-flowered; bracts clasping, resembling leaves; calyx 6 mm long, 5-toothed, teeth narrowly ovate-subulate, 2.5 mm long, not spinescent, villous; corolla 15-16 mm long, purple to whitish; Mar.-Sep.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 6
    • ]. 

    Habitat

    Now a widespread weed and fairly widely distributed in gardens and waste places.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Dry Grassland. Widespread weed in gardens and waste places.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 6
    • ]. 

    Distribution

    A native probably of southern Europe and south-west Asia. In southern Africa.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Native to Europe and Asia.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 6
    • ]. 

      Bibliography

     Information From

    Lamiaceae
    • A 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.
    • B Missouri Botanical Garden
    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.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • D Missouri Botanical Garden
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • E All Rights Reserved
    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.
    • F Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • G CC0 1.0 Universal (CC0 1.0).