Populus L.
  • Sp. Pl. 2: 1034. 1753. (1 May 1753)
  • [Latin populus, the people, many fanciful allusions supposed but none certain]


Cite taxon page as 'WFO (2020): Populus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000030925. Accessed on: 29 Nov 2020'

General Information

Trees; trunk usually straight; bark furrowed or smooth, often gray or tan; pith mostly 5-angled in cross section. Terminal bud terete or angled; bud scales several, unequal. Stipules small, deciduous; petiole terete or laterally compressed; leaf blade usually ovate to deltoid-ovate. Flowering precocious; catkins pendulous. Flowers anemophilous; bracts apically lobed or laciniate, membranous, caducous; flowers with disc obliquely cupular. Male flower: stamens 4-many; filaments short, free; anthers dull red. Female flower: ovary 1-loculed; style 1, short or not; stigmas 2-4. Capsule 2-4(or 5)-valved. Seeds few to numerous, small. Cotyledons elliptic.

  • Provided by: [D].Flora Of CHina @ efloras.org
    • Source: [
    • 4
    • ]. 

    Trees, usually heterophyllous, usually clonal, clones formed by root shoots; branching usually monopodial [or sympodial]. Stems not spinose. Buds 3-10-scaled (resinous or not, terminal buds present [or absent]). Leaves deciduous; stipules present (caducous, usually minute, sometimes prominent on sucker shoots); petiole not glandular; (blade usually less than twice as long as wide, venation ± palmate, basal secondary veins strong, paired, except in Populus angustifolia, margins subentire or crenate, basilaminar glands 0-6). Inflorescences axillary or terminal, catkins, pendulous, sessile, unbranched, (leafless, flowering before leaves emerge); floral bract caducous, apex deeply or shallowly cut, (sometimes ciliate, usually glabrous, except pubescent abaxially in P. heterophylla); pistillate bract deciduous after flowering. Pedicels present. Flowers: perianth modified into non-nectariferous disc, (persistent, caducous in P. heterophylla), cup- or saucer-shaped; stamens 6-60(-70); filaments distinct; ovary 2-4-carpellate; ovules (1 or) 2-25 per ovary; styles distinct; stigmas 2-4, cylindrical to platelike, often rolled or convoluted, entire or 2-lobed. Fruits capsular, (2-4-valved, ovoid or spherical). Seeds: aril present. x = 19.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 5
    • ]. 

    "Catkins drooping, appearing before the lvs, their scales toothed, lobed, fimbriate, or densely ciliate; each fl set on a cupulate, commonly oblique disk that may be homologous with the “glands” of Salix fls; stamens 5–80, on short filaments; styles 2–4-valved, trees or tall shrubs with soft, light wood, mostly ovate to deltoid, deciduous lvs, scaly, often viscid winter-buds, and elongate catkins that mature before the lvs are fully expanded in the spring. 40, widespread."

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 6
    • ]. 

    Morphology

    Male flowers with 4–many stamens; anthers oblong

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Female flowers with style very short, 2–4-branched, each branch entire or 2–3-fid

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Capsule 2–4 valved.

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Trees

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Leaves on mature growth usually broad (juvenile foliage sometimes linear, ‘ Salix -like’)

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Buds with several unequal outer scales

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Disc cup-shaped, annular or fimbriate

  • Provided by: [A].Plants Of the World Online Portal - FTEA
    • Source: [
    • 3
    • ]. 

    Literature

    SELECTED REFERENCES Eckenwalder, J. E. 1977. North American cottonwoods (Populus, Salicaceae) of sections Abaso and Aigeiros. J. Arnold Arbor. 58: 193-208. Eckenwalder, J. E. 1984. Natural intersectional hybridization between North American species of Populus (Salicaceae) in sections Aigeiros and Tacamahaca. II. Taxonomy. Canad. J. Bot. 62: 325-335. Eckenwalder, J. E. 1996. Systematics and evolution of Populus. In: R. F. Stettler et al., eds. 1996. Biology of Populus and Its Implications for Management and Conservation. Ottawa. Pp. 7-32. Sudworth, G. B. 1934. Poplars, Principal Tree Willows and Walnuts of the Rocky Mountain Region. Washington. [U.S.D.A., Techn. Bull. 420.]

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 5
    • ]. 

    Included Species

    Other Local Names

    NameLanguageCountry
    [Latin populus, the people, many fanciful allusions supposed but none certain]

     Information From

    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
    • A
    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
    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 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.
    • D Missouri Botanical Garden
    Salicaceae
    • E CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).