Ulmus L.
  • Sp. Pl. 1: 225. 1753. (1 May 1753)
  • Elm, orme [Latin ulmus, elm]

Cite taxon page as 'WFO (2021): Ulmus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000039733. Accessed on: 26 Sep 2021'

General Information

Trees or shrubs, deciduous or evergreen. Branchlets never spinose, sometimes with a thick and irregularly longitudinally fissured corky layer or with 2 flat opposite corky wings. Bud scales imbricate, glabrous or pubescent. Stipules 2, lanceolate-ovate to linear, membranous, caducous, leaving a short transverse scar on each side of leaf base. Leaves distichous, blade base ± oblique, margin doubly or simply serrate; venation pinnate; secondary veins extending to margin, each ending in a tooth. Bracteoles at base of pedicels, membranous. Pedicel shorter than to almost as long as perianth, pubescent or rarely glabrous. Flowers bisexual or polygamous, appearing in spring before leaves, rarely in autumn or winter. Perianth 4-9-lobed, usually campanulate; tepals membranous, usually persistent, apex usually lacinulate. Stamens equal in number to tepals; filaments flat; anthers extrorse. Ovary flat; ovule pendulous, amphitropous. Style very short or rarely slightly elongate and bifid; stigmas 2, linear, pubescent. Samara flat, orbicular, obovate, oblong, elliptic, or rarely shuttle-shaped, wings membranous, apex with notch and persistent stigmas. Seed at center or toward apex of samara, compressed or ± convex, without endosperm; embryo erect; cotyledon flat or ± convex.

  • Provided by: [C].Flora Of CHina @ efloras.org
    • Source: [
    • 2
    • ]. 

    Trees, less often shrubs , to 35 m; crowns variable. Bark gray, brown, or olive to reddish, tan, or orange, deeply furrowed, sometimes with plates (smooth when young in Ulmus glabra ). Branches unarmed, slender to stout, some with corky wings; twigs glabrous to pubescent. Leaves sometimes tardily deciduous; stipules falling early. Leaf blade ovate to obovate or elliptic, base usually oblique, sometimes cordate or rounded to cuneate, margins serrate to doubly serrate; venation pinnate. Inflorescences fascicles, racemes, or cymes, pedunculate or subsessile, subtended by 2 bracts. Flowers on branches of previous season, appearing in spring before leaves or in fall, bisexual, pedicellate or sessile; calyx 3-9-lobed; stamens 3-9; styles persistent, deeply 2-lobed. Fruits samaras, usually flattened, membranously winged. x = 14.

  • Provided by: [F].Flora of North America @ efloras.org
    • Source: [
    • 3
    • ]. 

    3. Ulmus L.

    Chaetoptelea Liebm.

    Por M.Nee.

    Árboles inermes. Hojas generalmente alternas, dísticas,serradas o 2-serradas, caducas o casi caducas, pinnatinervias; yemas foliaresperuladas. Inflorescencias axilares, racemosas o fasciculadas. Floresbisexuales (rara vez unisexuales); cáliz (4)5(-9)-lobado, membranáceo;estambres en igual número y opuestos a los lobos del cáliz; ovario sésil oestipitado, comprimido, 1-locular (rara vez 2-locular). Frutos generalmente ensámaras aplanadas, con un ala marginal o en drupas secas com­primidas, el alaescasamente diferenciada (Mesoamérica); endospermo ausente; embrión recto.Aprox. 25-30 spp. Regiones templadas del hemisferio norte.

  • Provided by: [D].Flora Mesoamericana
    • Source: [
    • 4
    • 1
    • ]. 

    ULMUS L.; Chaetoptelea Liebm.

    Ulmus mexicana (Liebm.) Planch. in A. DC., Prodr. 17: 156. 1873; Chaetoptelea mexicana Liebm.

    Arboles grandes, 10–35 m de alto; plantas hermafroditas. Hojas alternas, lanceoladas a oblongo-ovadas, 4–9.7 cm de largo y 1.4–3.8 cm de ancho, ápice acuminado, base oblicua, redondeada a cordada, serradas, ligeramente escabrosas en la haz y el envés, pinnatinervias. Inflorescencias axilares, racemosas; sépalos 5, connados para formar un tubo campanulado, blancos; estambres 5; ovario obovado, estipitado, 2-carpelar, 1-locular, velutino en los márgenes; estilos introrsamente recurvados. Frutos secos, samaroides, ca 1 cm de largo, velutinos a lo largo de los márgenes.

    Poco común en bosques nublados, Matagalpa, Jinotega; 1200–1400 m; fl mar, dic; Grijalva 3708, Stevens 22541; México hasta Panamá. Género con 30–40 especies distribuidas en las regiones templadas del hemisferio norte y en Centroamérica.

  • Provided by: [E].Flora de Nicaragua
    • Source: [
    • 5
    • ]. 

    Bisexual shrubs or trees, the branches often flexuose. Leaves alternate, dis- tichous, inequilateral, serrate; stipules lateral. Inflorescence racemose or fasciculate, borne axillary on last year's growth. Flowers bisexual; sepals 4-8, more or less connate at the base; stamens as many as and opposite the calyx lobes, the anther dehiscence extrorse; ovary sessile or stipitate, 2-carpellate, 1-locular, compressed, the styles 2, often introrsely recurved, persistent. Fruit more or less samaroid, dry; seed flat; embryo straight with generally flat cotyledons; exendospermous.

  • Provided by: [G].Flora de Panama
    • Source: [
    • 6
    • ]. 

    "Fls perfect, in short racemes or fascicles; cal campanulate, 4–9-lobed or cleft; anthers extrorse; styles short; fr a flat, 1-seeded samara, usually shortly stipitate and often surmounted by the persistent and sometimes enlarged styles; embryo straight; trees with pinnately veined, inequilateral, usually doubly serrate lvs; the small fls appear from buds resembling but a little larger than the lf-buds. 20, mainly N. Hemisphere. Three cult. Old-World spp. that occasionally escape are included in the key but not described."

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


    shrub tree

  • Provided by: [G].Flora de Panama
    • Source: [
    • 6
    • ]. 


    Represented in Panama by a single species.

  • Provided by: [G].Flora de Panama
    • Source: [
    • 6
    • ]. 



    Green, P. S. 1964. Registration of cultivar names in Ulmus. Arnoldia (Jamaica Plain) 24: 41-80. Sherman, S. L. 1987. Flavonoid Systematics of Ulmus L. in the United States. M.S. thesis. University of Georgia. Sherman, S. L. and D. E. Giannasi. 1988. Foliar flavonoids of Ulmus in eastern North America. Biochem. Syst. & Ecol. 16: 51-56. Stipes, R. J. and R. J. Campana, eds. 1981. Compendium of Elm Diseases. St. Paul. Stockmarr, J. 1974. SEM studies on pollen grains of North European Ulmus species. Grana 14: 103-107. Wheeler, E., C. A. LaPasha, and Regis B. Miller. 1988. Wood anatomy of elm (Ulmus) and hackberry (Celtis) species native to the United States. I. A. W. A. Bull., N.S. 10: 5-26. Wiegrefe, S. J., K. J. Sytsma, and R. P. Guries. 1994. Phylogeny of elms (Ulmus, Ulmaceae): Molecular evidence for a sectional classification. Syst. Bot. 19: 590-612.

  • Provided by: [F].Flora of North America @ efloras.org
    • Source: [
    • 3
    • ]. 

    Other Local Names

    Elm, orme [Latin ulmus, elm]

     Information From

    MBG Floras Images
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • A 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.
    • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @ efloras.org
    '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.
    • C Missouri Botanical Garden
    Flora Mesoamericana
    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
    Flora de Nicaragua
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • E Missouri Botanical Garden
    Flora of North America @ efloras.org
    '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
    Flora de Panama
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • G Missouri Botanical Garden
    • H CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    World Flora Online Data. 2018.
    • I CC0 1.0 Universal (CC0 1.0).