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WIKTROP - Weed Identification and Knowledge in the Tropical and Mediterranean areas
WIKTROP - Weed Identification and Knowledge in the Tropical and Mediterranean areas
SpeciesMapsDocumentsIDAO

Scolymus grandiflorus Desf.

Accepted
Plantes adultes en fleurs.
Gros capitules de fleurs toutes ligulées jaunes.
Gros capitules de fleurs toutes ligulées jaunes.
Gros capitules de fleurs toutes ligulées jaunes.
Gros capitules de fleurs toutes ligulées jaunes.
🗒 Synonyms
synonymMyscolus grandiflorus D.Dietr.
synonymMyscolus megacephalus Cass.
synonymScolymus hispanicus subsp. grandiflorus (Desf.) P.Fourn.
synonymScolymus hispanicus subsp. grandiflorus (Desf.) Rouy
🗒 Common Names
Arabic
  • Guernis
  • Djernis
  • Zernis
  • Izifou
French
  • Scolyme à grandes fleurs
Italian
  • Cardogna maggiore
📚 Overview
Overview
Brief

Code

SCYGR

Growth form

Broadleaf

Biological cycle

Biennial (H2) to vivacious (H).

Habitat

Terrestrial

 

KAZI TANI Choukry
AttributionsKAZI TANI Choukry
Contributors
Thomas Le Bourgeois
StatusUNDER_CREATION
LicensesCC_BY
References
    Diagnostic Keys
    Description

    Seedling

    Quite similar to that of Scolymus hispanicus. Cotyledons elliptic large, 16-22 x 8-10 mm, short-stalked, with rounded apex, glabrous. Primordial leaves rosette-shaped, simple, lanceolate to elliptic, toothed with broad soft indentations and long spines. Leaves and petioles hairy. The hypoctyled axis is short and thick. Plantlet of a shiny green.

    Adult plant

    Scolymus grandiflorus is a thorny perennial, which can reach 50 cm in height. Stem erect, simple or little branched, strongly winged, with continuous spiny wings, pubescent. Leaves simple, sessile, deeply pennatifid, the linear cauline ones, little embracing but decurrent, the base extending in spiny foliaceous wing along the stem. The upper leaves forming an involucre at the base of the capitula, with pubescent underside. Capitula sessile in leaf axils or along terminal axis, or pedunculate terminals, large (10)12-20(21) mm in diameter (twice the diameter of capitula of S. hispanicus). Involucre formed of 1-3 involucral outer leaves oval, lanceolate with acute, mucronate spiny apex and margin with long coarse spiny teeth and linear oblong inner bracts mucronate, in 2-3 rows. Florets all yellow ligulate with ligule up to 3 cm long, short bi-tridentate at apex. Achenes 3.5-5 mm, strongly compressed dorsally, intimately enclosed in the scales of the receptacle, surmounted by a pappus of 2-5 stiff, smooth setae.

    KAZI TANI Choukry
    AttributionsKAZI TANI Choukry
    Contributors
    StatusUNDER_CREATION
    LicensesCC_BY
    References
      No Data
      📚 Natural History
      Life Cycle

      Life cycle

      Vivacious
      Vivacious

      Algeria: Scolymus grandiflorus has an autumn germination and a flowering from March to June (earlier and shorter than S. hispanicus).
      Morocco: Scolymus grandiflorus flowers from April to June.

      Wiktrop
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        Cyclicity

        Scolymus grandiflorus is a biennial to vivacious species.

        KAZI TANI Choukry
        AttributionsKAZI TANI Choukry
        Contributors
        StatusUNDER_CREATION
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        References
          Reproduction

          Scolymus grandiflorus regenerates from a persistent stump and reproduces by seed.

          KAZI TANI Choukry
          AttributionsKAZI TANI Choukry
          Contributors
          StatusUNDER_CREATION
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            Dispersal

            Scolymus grandiflorus is an anemochorous species.

            KAZI TANI Choukry
            AttributionsKAZI TANI Choukry
            Contributors
            StatusUNDER_CREATION
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            References
              Size
              Morphology

              Latex

              White latex
              White latex

              Root type

              Taproot
              Taproot

              Stipule type

              No stipule
              No stipule

              Leaf attachment type

              Decurrent leaf
              Decurrent leaf

              Achene type

              Achene flat
              Achene flat

              Cotyledon type

              emarginate
              emarginate

              Lamina base

              sheathing grass-like broader
              sheathing grass-like broader

              Lamina margin

              largely dentate
              largely dentate

              Lamina apex

              apiculate
              apiculate

              Simple leaf type

              Lamina linear
              Lamina linear
              Lamina deeply lobed
              Lamina deeply lobed

              Lamina Veination

              Curved and united with the vein above
              Curved and united with the vein above

              Inflorescence type

              Raceme with alternate sessile flowers
              Raceme with alternate sessile flowers
              Capitule with ligulate flowers
              Capitule with ligulate flowers

              Stem pilosity

              Dense hairy
              Dense hairy

              Life form

              Broadleaf plant
              Broadleaf plant
              Look Alikes

              Scolymus grandiflorus can be confused with S. hispanicus and S. maculatus.

              S. maculatus can be distinguished by the presence of 5 involucral leaves around the flower head and achenes without pappus, a whitish stem with continuous spiny wings
              S. hispanicus is distinguished by 1-3 involucral leaves around the flower head, a flower head of 6-10 mm diameter and a pappus of scabrous bristles at the top of the achenes, a whitish green stem with interrupted wings
              S. grandiflorus is distinguished by 1-3 involucral leaves around the flower head, a flower head 12-20 mm in diameter, a pappus of hairless bristles at the apex of the achene and a green uninterrupted winged stem.

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                Physiology

                Scolymus grandiflorus is a C3 species.

                KAZI TANI Choukry
                AttributionsKAZI TANI Choukry
                Contributors
                StatusUNDER_CREATION
                LicensesCC_BY
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                  Ecology

                  Algeria: Scolymus grandiflorus is a less frequent species than S. hispanicus, occurring in perennial crops (vineyards, orchards) throughout the Mediterranean area of Algeria. This species has a preference for silty to sandy soils.
                  Morocco: Scolymus grandiflorus is a rare species that grows on clay soils, pastures, wasteland and the edges of crops on sublittoral plains and hills with good rainfall, from 0 to 600 m altitude.

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                    No Data
                    📚 Habitat and Distribution
                    Description

                    Origin

                    Scolymus grandiflorus is native to the Mediterranean area (France, Italy, Syria and North Africa).

                    Algeria: Common species in the Tell.

                    KAZI TANI Choukry
                    AttributionsKAZI TANI Choukry
                    Contributors
                    StatusUNDER_CREATION
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                      No Data
                      📚 Occurrence
                      No Data
                      📚 Demography and Conservation
                      Risk Statement

                      Local harmfulness

                      Algeria: Scolymus grandiflorus is a minor "weed". Uncommon and not very abundant, it does not generally constitute a nuisance for the crops.

                      KAZI TANI Choukry
                      AttributionsKAZI TANI Choukry
                      Contributors
                      StatusUNDER_CREATION
                      LicensesCC_BY
                      References
                        No Data
                        📚 Uses and Management
                        Uses

                        Food: Scolymus grandiflorus in the young stage is consumed raw and one harvests in winter the sheets of which the ribs are used as vegetable, at this time they are generally mixed with other vegetables to accompany the couscous.

                        Fodder : Plant grazed by the livestock except in the dry state.

                        KAZI TANI Choukry
                        AttributionsKAZI TANI Choukry
                        Contributors
                        StatusUNDER_CREATION
                        LicensesCC_BY
                        References
                          No Data
                          📚 Information Listing
                          References
                          1. Plants of the World Online https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:243008-1
                          2. Kazi Tani C., Grard P. & Le Bourgeois T., 2021. "AdvenAlg 1.0 Identification et connaissance des principales adventices d'Algérie méditerranéenne." Al Yasmina, Revue de Botanique 2(3): 1-187.
                          3. Flora Maroccana (Dobignard A.) https://www.floramaroccana.fr/scolymus-grandifl.-cle.html
                          4. CABI https://www.cabidigitallibrary.org/doi/10.1079/cabicompendium.116990
                          Information Listing > References
                          1. Plants of the World Online https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:243008-1
                          2. Kazi Tani C., Grard P. & Le Bourgeois T., 2021. "AdvenAlg 1.0 Identification et connaissance des principales adventices d'Algérie méditerranéenne." Al Yasmina, Revue de Botanique 2(3): 1-187.
                          3. Flora Maroccana (Dobignard A.) https://www.floramaroccana.fr/scolymus-grandifl.-cle.html
                          4. CABI https://www.cabidigitallibrary.org/doi/10.1079/cabicompendium.116990
                          Images
                          Wiktrop
                          AttributionsWiktrop
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                          StatusUNDER_CREATION
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                          References
                            No Data
                            🐾 Taxonomy
                            📊 Temporal Distribution
                            📷 Related Observations
                            👥 Groups
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