Euphorbia esula L.
  • Sp. Pl.


Cite taxon page as 'WFO (2020): Euphorbia esula L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000961974. Accessed on: 07 Apr 2020'

General Information

Herbs, erect, (15-)30-60 cm tall. Rootstock enlarged or sometimes extensively rhizomatous, brown or dark brown, up to 20 cm × 3-5(-6) mm, branched or not. Stems single or clustered, many branched basally, 3-5 mm thick; sterile stems sometimes present, sometimes overtopping inflorescence. Leaves alternate, often larger toward stem apex; stipules absent; basal scale-leaves few; petiole absent; leaf blade linear to ovate, very variable, (1.5-)2-7 × (0.15-)0.4-0.7(-1.2) cm, base attenuate, cuneate, or truncate, apex acuminate or acute; leaves on sterile branches denser, needlelike, 2-3 × ca. 0.1 cm. Inflorescence a terminal pseudumbel, often with lateral cymes from axils below; cymes mostly dichotomous; primary involucral leaves 3-8, similar to normal leaves to almost orbicular, primary rays 3-8, 2-4(-5) cm; cyathophylls 2, sometimes overlapping at base, usually reniform, occasionally ovate or triangular-ovate, pair often forming complete circle, 0.4-1.2 × 0.4-1 cm, base subtruncate to shallowly cordate, apex shortly acuminate to rounded. Cyathium sessile; involucre campanulate, ca. 3 × 2.5-3 mm, lobes rounded to triangular, tomentose on margin and inside; glands 4, brown, crescent-shaped, usually 2-horned, horns long and acute to short and obtuse or absent, sometimes so tightly incurved that gland looks circular. Bracteoles linear, glabrous. Male flowers many. Female flower: ovary exserted from cup, smooth, glabrous; styles free, persistent; style arms 2-lobed. Capsule trigonous-globose, 5-6 × 5-6 mm, with 3 vertical furrows. Seeds ovoid-globose, 2.5-3 × 2-2.5 mm, yellow-brown; caruncle present, peltate, sessile. Fl. and fr. Apr-Oct. 2n = 40*.

  • Provided by: [B].Flora Of CHina @ efloras.org
    • Source: [
    • 1
    • ]. 

    "Strong-rooted, vigorously colonial perennial, erect, 3–7 dm, glabrous, usually with numerous alternate flowering branches below the umbel; cauline lvs linear to lance-linear or narrowly oblanceolate, mostly 3–8 cm × 3–8 mm, obtuse to mucronate, essentially 1-nerved, the lateral veins very obscure, leaving the midrib at an angle of 15–35°; lvs subtending the umbel shorter and broader, lanceolate to ovate, those of the umbel opposite, broadly cordate or reniform; rays of the primary umbel mostly 7–15; fr 3–3.5 mm, finely granular; seeds ellipsoid, 2–2.5 mm; 2n=20, 60, 64. Native of Eurasia, widely established in N. Amer. from New England to the Pacific, s. to Md., Ind., Io., and Colo. Summer. (Tithymalus e.; Galarhoeus e.; Euphorbia intercedens; E. podperae; E. virgata, at least as applied to N. Amer. plants)"

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 2
    • ]. 

    Synonyms

      Bibliography

     Information From

    Euphorbiaceae
    • A CC0 1.0 Universal (CC0 1.0).
    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.
    • 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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).