Alyssum alyssoides L.
  • Syst. Nat. ed. 10 , 2: 1130 (1759)
  • Alissa cumina


Cite taxon page as 'WFO (2023): Alyssum alyssoides L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000529216. Accessed on: 28 Jan 2023'

General Information

Herbs annual, 5-35(-50) cm tall, canescent with appressed, sessile, 6-10-rayed stellate trichomes, these mixed with simple and forked ones on pedicels and sepals. Stems erect, ascending, or decumbent, 1 to several from the base. Cauline leaves subsessile or lowermost shortly petiolate; leaf blade narrowly oblanceolate or linear, sometimes spatulate or obovate, 3-4(-4.5) cm × (0.5-)1-3.5(-5) mm, base attenuate or cuneate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, 2-5(-6) mm, slender, straight, covered with stellate trichomes mixed with fewer, simple and forked ones. Sepals oblong, (1.5-)2-3 × 0.7-1.1 mm, persistent, pubescent as pedicels. Petals white or pale yellow, linear to linear-oblanceolate, rarely obovate, 2-3(-4) × 0.3-0.7(-1) mm, glabrous or sparsely stellate outside, often persistent, apex emarginate. Filaments 1-1.5 mm, slender, neither appendaged nor toothed; anthers ovate, 0.15-0.2 mm. Ovules 2 per locule. Fruit orbicular, (2-)3-4(-5) mm in diam., apex emarginate or truncate; valves not veined, uniformly inflated at center, strongly flattened at margins, sparsely stellate; style 0.3-0.6(-1) mm, slender, usually glabrous. Seeds 1 or 2 per locule, oblong or ovate, 1.1-2 × 0.7-1.1 mm, compressed, narrowly margined all around, margin ca. 0.1 mm wide. Fl. and fr. May-Jul. 2n = 32.

  • Provided by: [E].Flora of China @ efloras.org
    • Source: [
    • 1
    • ]. 

    Annuals; canescent throughout, trichomes appressed, 6-10- rayed, mixed with simple and forked on pedicels and sepals. Stems simple or few to several from base, erect, ascending, or decumbent, (unbranched or branched distally), 0.5-3.5 (-5) dm. Cauline leaves subsessile or (proximal) shortly petiolate; blade usually narrowly oblanceolate to linear, sometimes spatulate or obovate, 3-4(-4.5) cm × (0.5-) 1-3.5(-5) mm, base attenuate or cuneate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, straight, slender, 2-5(-6) mm, trichomes stellate, with fewer, simple and forked ones. Flowers: sepals (persistent) oblong, (1.5-)2-3 × 0.7-1.1 mm, pubescent as pedicels; petals (often persistent) white or pale yellow, usually linear to linear-oblanceolate, rarely obovate, 2-3(-4) × 0.3-0.7(-1) mm, apex emarginate, glabrous or sparsely stellate-pubescent abaxially; filaments (slender) not appendaged, toothed, or winged, 1-1.5 mm; anthers ovate, 0.15-0.2 mm. Fruits orbicular, (2-)3-4(-5) mm diam., apex emarginate or truncate; valves uniformly inflated at middle, strongly flattened at margins, sparsely stellate-pubescent; ovules 2 per ovary; style (slender), 0.3-0.6(-1) mm, basally stellate-pubescent or glabrous. Seeds oblong to ovoid, compressed, 1.1-2 × 0.7-1.1 mm, margins narrow, ca. 0.1 mm wide. 2n = 32.

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

    Annual, 5–25 cm, stellate-hairy throughout; lvs oblanceolate, 6–15 mm, entire, obtuse; fls pale yellow or nearly white, 2 mm wide; pet narrowly oblong; frs on widely divergent pedicels, orbicular, 3–4 mm, flat at the margin, convex toward the center; seeds 2 per locule; 2n=32. Native of Europe, abundant as a weed in waste places nearly throughout our range, and to w. U.S. May, June. (Clypeola a.)

  • Provided by: [C].Manual of Vascular Plants of Northeastern US and Canada
    • Source: [
    • 4
    • ]. 

    Morphology

    5–20 cm hoch, aufrecht oder aufsteigend, meist vom Grund an verzweigt. Ganze Pflanze von Sternhaaren grau. Stängelblätter spatelförmig, bis 2 cm lang, in den kurzen Stiel verschmälert. Kronblätter blassgelb, zuletzt weiss, 2–4 mm lang. Fr

  • Provided by: [D].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 3
    • ]. 

    Ecology

    4–5. Trockenrasen, Felsensteppen, kollin-subalpin. J, VS, GR, seltener M, AN und TI.

  • Provided by: [D].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 3
    • ]. 

    Synonyms

    Other Local Names

    NameLanguageCountry
    Alissa cuminaRaeto-RomanceCH
    Alysson annuelFrenchCH
    Kelch-SteinkrautGermanCH
    Alisso annuoItalianCH

      Bibliography

     Information From

    Brassicaceae
    http://www.worldfloraonline.org/organisation/Brassicaceae
    World Flora Online Data. 2021.
    • A CC0 1.0 Universal (CC0 1.0).
    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.
    • B Flora of North America Association
    Manual of Vascular Plants of Northeastern US and Canada
    https://www.nybg.org/
    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 Helvetica – Illustrierte Flora der Schweiz
    http://www.flora-helvetica.ch
    Flora Helvetica – Illustrierte Flora der Schweiz, Konrad Lauber, Gerhart Wagner, Andreas Gygax. Haupt Verlag 2018.
    • D All Rights Reserved
    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.
    • E Missouri Botanical Garden
    World Flora Online Consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2017.
    • F CC0 1.0 Universal (CC0 1.0).