Mentzelia L.
  • Sp. Pl. 1: 516. 1753. (1 May 1753)
  • Blazingstar, stickleaf [For Christian Mentzel, 1622–1701, German botanist]


Cite taxon page as 'WFO (2021): Mentzelia L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000023752. Accessed on: 21 Sep 2021'

General Information

Herbs or subshrubs [shrubs or trees], annual, biennial, or perennial; trichomes (1) pointed with surfaces ± smooth or antrorsely barbed and (2) retrorsely barbed along shaft and at apex or only at apex. Stems erect, clambering, or decumbent. Leaves basal and cauline or cauline; petiole present or absent; blade hastate, deltate, cordate, ovate, elliptic, lanceolate, linear, spatulate, oblanceolate, obovate, or orbiculate, lobed or unlobed, margins dentate, serrate, crenate, or entire. Inflorescences dichasia or flowers solitary; peduncle inconspicuous. Pedicels not elongating in fruit. Flowers: hypanthium adnate to ovary proximally, free distally; perianth whorls differentiated; sepals green, connate basally, lanceolate to narrowly ovate, shorter than petals; petals white, yellow, or orange, sometimes red proximally, distinct or connate basally, spatulate, ovate, elliptic, oblanceolate, or obovate, spreading to erect, glabrous or hairy abaxially, on margins, or on apices; nectary distal on ovary; stamens 8–45+, exserted or included; filaments monomorphic, filiform or dorsiventrally flattened and linear, or heteromorphic, outer dorsiventrally flattened and linear, elliptic, spatulate, or oblanceolate [lanceolate], inner filiform or dorsiventrally flattened and linear, longer than anthers; anthers without distal connective extension; staminodes present or absent; pistil 3-carpellate (5–7-carpellate in M. decapetala), placentae parietal; stigma lingulate, 3-lobed (5–7-lobed in M. decapetala), papillate. Fruits capsules, dehiscing by apical valves [splitting longitudinally], cup-shaped, lingulate, subcylindric, cylindric, ovoid, urceolate, clavate, or funnelform, straight or curved, sometimes S-shaped; sepals persistent. Seeds (1–)2–60+, ovoid, oblong, bottle-shaped, pyriform, irregularly polygonal, or trigonal prisms, dorsiventrally flattened or not, 0.5–4.5 mm, winged or not winged. x = 9.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    MENTZELIA L.

    Mentzelia aspera L., Sp. Pl. 516. 1753.

    Hierbas anuales, erectas a escandentes; tallos, hipanto y cápsula hirsuto-híspidos, los tricomas con barbas diminutas, tricomas pequeños mezclados con tricomas más largos y gruesos frecuentemente con 3 barbas uncinadas en el ápice. Hojas alternas, lanceoladas a ovadas con 2 lobos grandes en la base, 2.2–9 cm de largo y 1.5–9 cm de ancho, ápice acuminado, base obtusa, margen dentado, estrigosas. Flores solitarias, axilares, sésiles, hipanto angostamente cilíndrico; tubo calicino libre del hipanto por ca 1 mm, lobos calicinos 5, linear-lanceolados, 4–6 mm; pétalos 5, obovados a orbiculares, 7–10 mm de largo, amarillos o anaranjados; estambres 20–30, los externos con filamentos petaloides, estaminodios ausentes. Cápsula cilíndrica, atenuada hacia la base, ca 15 mm de largo y 3 mm de ancho, apicalmente dehiscente por 3 suturas, sépalos y estilo ausentes en el fruto, sésil; semillas 6–9.

    Frecuente, en áreas perturbadas de bosques secos, zonas pacífica y norcentral; 15–1000 m; fl sep–nov, fr dic; Moreno 5264, Stevens 4402; Estados Unidos (Arizona) a Argentina, en las Islas Galápagos y también en las Antillas. Género americano con ca 60 especies.

  • Provided by: [C].Flora de Nicaragua
    • Source: [
    • 3
    • ]. 

    Herbaceous annuals or perennials, rarely small shrubs or trees, the stems and foliage scabrous and hispid, but without stinging hairs. Leaves alternate or op- posite, variously incised or lobed. Inflorescence terminal, cymose, usually few- flowered. Flowers large to mediocre; sepals foliaceous, 5; petals 5-10, free or barely united at the base; stamens 10 to very numerous, free or united at the base of the filaments, wholly fertile or the outermost becoming petaloid and sterile; ovary inferior, 1-celled, with few to numerous ovules borne upon 3-7 parietal placentas, the style elongate, filiform, the stigma scarcely dilated, capitate or obscurely divided. Fruit an apically dehiscent 3- to 7-valved capsule.

  • Provided by: [A].Flora de Panama
    • Source: [
    • 4
    • 5
    • ]. 

    "Hypanthium ovoid to cylindric or obconic; sep 5; pet 5–10; stamens 10–200, distinct or connate into fascicles; ovules 2–many on 3 parietal placentas; style 3-lobed; fr a capsule; annual or perennial herbs or shrubs, armed with stiff, barbed hairs, with alternate, serrate to pinnatifid lvs and 1–many often large, white to yellow or orange fls terminating the branches. (Nuttallia) 50, New World."

  • Provided by: [F].New York Botanical Garden
    • Source: [
    • 7
    • ]. 

    Habit

    Herb

  • Provided by: [A].Flora de Panama
    • Source: [
    • 4
    • 5
    • ]. 

    Distribution

    A genus of nearly 100 species, principally in the western United States and Mexico, but extending along the Pacific coast of South America to Patagonia. A single species is known from Panama.

  • Provided by: [A].Flora de Panama
    • Source: [
    • 5
    • 4
    • ]. 

    Included Species

    Other Local Names

    NameLanguageCountry
    Blazingstar, stickleaf [For Christian Mentzel, 1622–1701, German botanist]

     Information From

    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • A 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.
    • B Flora of North America Association
    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
    • C Missouri Botanical Garden
    Loasaceae
    World Flora Online Data. 2017.
    • D 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.
    • E 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.
    • F 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.
    • G CC0 1.0 Universal (CC0 1.0).