Thalictrum L.
  • Sp. Pl. 1: 545. 1753. (1 May 1753)
  • Meadow-rue, pigamon [ Thaliktron, an ancient name used by Dioscorides]


Cite taxon page as 'WFO (2021): Thalictrum L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000038055. Accessed on: 17 Oct 2021'

General Information

Herbs perennial, from woody rhizomes, caudices, or tuberous roots. Leaves basal and cauline, proximal leaves petiolate, distal leaves sessile; cauline leaves alternate. Leaf blade 1--4-ternately or -pinnately compound, rarely simple (Thalictrum rotundifolium); leaflets cordate-reniform, obovate, lanceolate, or linear, sometimes lobed, margin entire or crenate. Inflorescences terminal, sometimes also axillary, monochasial cymes, or sometimes racemelike, paniculate, flat topped, or umbel-like, 1--200-flowered; involucres absent or present, involucral bracts 2 or 3, leaflike, often resembling a whorl of 6--9 simple bracts, not closely subtending flowers. Flowers usually all bisexual, rarely bisexual and unisexual (T. smithii), or all unisexual (not in China), radially symmetric; sepals 4--10, whitish to greenish yellow or purplish, lanceolate to reniform or spatulate, flat, 1--18 mm, not persistent in fruit; petals absent; stamens 7--70; filaments filiform to clavate or distally swollen; staminodes absent; carpels 1--50(--70), 1-ovulate; style usually present and persistent, less often absent. Fruits achenes, usually aggregated, sessile or stipitate, fusiform to ovoid, obovoid, falcate, or discoid, laterally prominently ribbed; persistent style (when present) forming straight to circinately coiled beak. x = 7.

  • Provided by: [F].Flora Of CHina @ efloras.org
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    Herbs , perennial, from woody rhizomes, caudices, or tuberous roots. Leaves basal and cauline, proximal leaves petiolate, distal leaves sessile; cauline leaves alternate. Leaf blade 1-4×-ternately or -pinnately compound; leaflets cordate-reniform, obovate, lanceolate, or linear, sometimes 3-lobed or more, margins entire or crenate. Inflorescences terminal, sometimes also axillary, (1-)2-200-flowered panicles, racemes, corymbs, umbels, or flowers solitary, to 41 cm; involucres absent or present, involucral bracts 2-3 (these compound, often resembling whorl of 6-9 simple bracts), leaflike, not closely subtending flowers. Flowers all bisexual, bisexual and unisexual on same plant, or all unisexual with sexes on same or different plants, radially symmetric; sepals not persistent in fruit, 4-10, whitish to greenish yellow or purplish, plane, lanceolate to reniform or spatulate, 1-18 mm; petals absent; stamens 7-30; filaments filiform to clavate or distally dilated; staminodes absent between stamens and pistils; pistils 1-16, simple; ovule 1 per pistil; style present or absent. Fruits achenes, usually aggregate, sessile or stipitate, ovoid to obovoid, falcate, or discoid, sides prominently veined or ribbed; beak present or absent, terminal, straight to coiled, 0-4 mm. x = 7.

  • Provided by: [D].Flora of North America @ efloras.org
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    THALICTRUM L.

    Thalictrum guatemalense C. DC. & Rose, Contr. U.S. Natl. Herb. 5: 188. 1899; T. hondurense Standl.

    Hierbas perennes con tallo engrosado en la base arbustiva, 1 m de alto, hirsutas, con tricomas largos a cortos, densos a dispersos; plantas hermafroditas. Hojas (3) 4 (5)-ternadas o a veces 3-ternadas e imparipinnadas, folíolos ampliamente ovados u obovados a orbiculares, 1–3 cm de largo y 1–3.5 cm de ancho, ápice agudo a redondeado, base truncada a redondeada, 3 (4)-lobados, con o sin algunos dientes anchos, redondeados, escabroso hirsutos, peltados; pecíolo muy dilatado y envainador en la base. Inflorescencia paniculiforme, terminal o terminal y axilar, bracteada; sépalos 4, ca 3 mm de largo, tempranamente caducos; pétalos ausentes; estambres numerosos, filamentos filiformes y purpúreos, anteras ligeramente más largas que los filamentos; estilo largamente filamentoso, puberulento, caduco en fruto, carpelos libres. Fruto un aquenio, 1–6 por flor, 5–6 mm de largo y 2–2.5 mm de ancho, lateralmente comprimidos, arqueados y ampliamente oblicuos, marcadamente 5–9 acostillados.

    Rara, bosques de pino-encinos, zona norcentral; 1100–1200 m; fr jul–ago; Kral 69250, Moreno 16890; México hasta Nicaragua. Género con ca 85 especies distribuidas en las regiones templadas del hemisferio norte, América tropical y sur de Africa. Algunas otras especies se conocen en Centroamérica y podrían encontrarse en Nicaragua. T. guatemalense es la única que tiene tanto los folíolos peltados como la pubescencia caulina hirsuta.

    B. Benson. American Thalictra and their Old World allies. Rhodora. 46: 337–377, 391–445, 453–483. 1944.

  • Provided by: [G].Flora de Nicaragua
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    Glabrous to pubescent erect herbaceous or lignescent perennials, occasionally stoloniferous, the roots mostly fibrous, occasionally tuberous. Leaves radical and cauline, the cauline usually alternate, decompound, glabrous to pubescent, with swollen petiolar sheaths. Inflorescences mostly terminal, paniculate or rarely racemose or subcorymbose, bracteate or ebracteate, the flowers perfect, dioecious or polygamous; sepals 4-5(-7), caducous, greenish or petaloid; petals absent; stamens numerous, free, the anthers basifixed, often apiculate; carpels few to many, inde- hiscent, uniovulate. Achenes few to numerous, more or less saccate, often costate or nerved, the elongate styles frequently deciduous.

  • Provided by: [A].Flora de Panama
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    "Fls perfect or more often unisexual; plants hermaphrodite, dioecious, or polygamo-dioecious; sep 4–5, green or petaloid, soon deciduous; pet none; filaments elongate, capillary to clavate or much dilated; ovaries several, 1-seeded; style very short; stigma elongate; achenes usually conspicuously veined or ribbed, sometimes stipitate; perennial herbs with ternately decompound lvs and most ample terminal panicles of greenish, yellowish, purplish, or white fls, the color due principally to the stamens; polyploid series based on x=7. 50+, mostly N. Temp."

  • Provided by: [E].New York Botanical Garden
    • Source: [
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    Morphology

    Stamens 3 to numerous, often with conspicuous anthers.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
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    Petals absent.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
    • 5
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    Flowers actinomorphic, usually rather small in terminal panicles, bisexual or some male only, sepals 3–5, imbricate in bud, green or petaloid.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
    • 5
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    Herbs with compound spirally arranged leaves with sheathing bases.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
    • 5
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    Carpels 1 to numerous, 1-ovulate.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
    • 5
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    Achenes sessile or stipitate, stigma deciduous or persistent forming a long beak.

  • Provided by: [B].Plants Of the World Online Portal - FZ
    • Source: [
    • 5
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    Herbes'vivaces à tiges annuelles.'Feuilles'alternes, simples ou le plus souvent composées, très découpées, ressemblant à des feuilles de fougère, engainantes à la base, munies ou non d'appendices (oreillettes ou stipules adnées).'Inflorescences'terminales, sous forme de particules, grappes ou corymbes.'Fleurs'☿ ou plantes polygames ou parfois dioïques, régulières, plutôt petites, verdâtres, pourpres, jaunâtres ou blanches; sépales 3 à 7, imbriqués, petits, très caducs, parfois pétaloïdes; pétales nuls; nectaires nuls; étamines 3-8 ou davantage, presque toujours exsertes; anthères souvent linéaires ou linéaires-oblongues; carpelles solitaires à nombreux; ovules solitaires, pendants; stigmates caducs ou persistants.'Akènes sessiles ou stipités, ovales ou oblongs, sillonnés, anguleux-ailés ou parcourus de nervures longitudinales.\n\t\t\t\tPlus de 200 espèces répandues surtout dans l'hémisphère nord; quelques espèces dans les régions montagneuses tropicales. Environ 5 espèces en Afrique tropicale dont 2 au Congo belge, assez ornementales.\n\t\t\t\tIl serait du plus haut intérêt de voir si, au Congo belge, la forme aecidienne de'Puccinia triticina , la rouille brune du froment, ne se développe pas sur les feuilles des'Thalictrum .

  • Provided by: [C].Flore d'Afrique Centrale
    • Source: [
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    Habit

    herb

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

    Thalictrum is most common in temperate portions of the northern hemisphere, where a few species are handsome enough to be cultivated. In a monograph of the American Thalictra and their Old World allies, Boivin (in Rhodora 46: 337. 1944.) treated 112 species and varieties. Only two species are reported from Panama.

  • Provided by: [A].Flora de Panama
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    Literature

    SELECTED REFERENCES

    Boivin, B. 1944. American Thalictra and their Old World allies. Rhodora 46: 337-377, 391-445, 453-487. Boivin, B. 1948. Key to Canadian species of Thalictra. Canad. Field-Naturalist 62: 169-170. Lecoyer, J. C. 1885. Monographie du genre Thalictrum. Bull. Soc. Roy. Bot. Belgique 24: 78-324. Park, M. M. 1992. A Biosystematic Study of Thalictrum Section Leucocoma (Ranunculaceae). Ph.D. dissertation. Pennsylvania State University. Tamura, M. 1968. Morphology, ecology, and phylogeny of the Ranunculaceae. VIII. Sci. Rep. Coll. Gen. Educ. Osaka Univ. 17: 41-56. Tamura, M. 1992. A new classification of the family Ranunculaceae. Acta Phytotax. Geobot. 43: 53-58.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 7
    • ]. 

    Included Species

    Other Local Names

    NameLanguageCountry
    Meadow-rue, pigamon [ Thaliktron, an ancient name used by Dioscorides]

     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
    Plants Of the World Online Portal - FZ
    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
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • C http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    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.
    • D 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.
    • E Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    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
    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
    • G Missouri Botanical Garden
    Ranunculaceae
    • H CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • I CC0 1.0 Universal (CC0 1.0).