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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
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Paspalum conjugatum P.J.Bergius

Accepted
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Paspalum conjugatum P.J.Bergius
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Racème
Epillets
Epillets
Paspalum conjugatum P.J.Bergius
Lemma et paléa
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
Paspalum conjugatum P.J.Bergius
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🗒 Synonyms
synonymDigitaria conjugata (P.J.Bergius) Schult.
synonymPanicum conjugatum (P.J.Bergius) Roxb.
synonymPaspalum africanum Poir.
synonymPaspalum bicrurum Salzm. ex Döll [Invalid]
synonymPaspalum bicrurum Salzm. ex Döll, pro syn.
synonymPaspalum ciliatum Lam.
synonymPaspalum conjugatum f. tristachyum Beetle
synonymPaspalum conjugatum var. conjugatum
synonymPaspalum conjugatum var. parviflorum Döll
synonymPaspalum conjugatum var. pubescens Döll
synonymPaspalum conjugatum var. tristachyum Vanderyst, nom. provis.
synonymPaspalum dolichopus Trin. ex Steud. [Invalid]
synonymPaspalum dolichopus Trin. ex Steud., nom. nud.
synonymPaspalum hirsutum Poir.
synonymPaspalum longissimum Hochst. ex Steud.
synonymPaspalum renggeri Steud.
synonymPaspalum sieberianum Steud.
synonymPaspalum tenue Gaertn. [Illegitimate]
synonymPaspalum tenue Gaertn., nom. superfl.
🗒 Common Names
Creoles and pidgins; French-based
  • Zèb si, Zèb mouton, Zèb fin (Antilles)
Créole Maurice
  • Sour grass
  • Yellow grass
  • Herbe créole
Créole Seychelles
  • Buffalo grass
  • T-grass
English
  • Buffalo grass
Malgache
  • Ahipisaka
Spanish; Castilian
  • Grama
📚 Overview
Overview
Brief
Code
PASCO
Growth form
grass
Biological cycle
vivacious
Habitat
terrestrial
Thomas Le Bourgeois
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Thomas Le Bourgeois
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    Diagnostic Keys
    Description

    Global description

    Paspalum conjugatum is a vivacious herb with long runners, almost glabrous, turfting, with slender erect stems, 10 to 60 cm high. The leaves are narrowly lanceolate, tapered at the end, with compressed sheath, ciliated on the margin, with short membranous truncate ligule, slightly visible. The inflorescence is composed of a pair of thin racemes, opposite and forming a very open angle. The spikelets, are orbicular and flattened, have a fringed edge of long silky hairs. They are pale yellow in color and are applied against the rachi. They contain a suborbicular grain, a slightly more than 1 mm long.
     
    General habit

    Vivacious grass, stoloniferous, turfting and measuring 20 cm to 60 cm high.
     
    Underground system

    The roots are fibrous. Stolons are up to 2 m long.
     
    Culm

    The culm of the grass is erect, slender and compressed at the base, glabrous except at the nodes which are sometimes ciliated.

    Leaf

    The leaves are simple alternate. The sheath is compressed and keeled, glabrous to ciliated margins. The membranous ligule is short and truncated. The lamina is linear to linear-lanceolate, with acute tip. It measures 4 to 20 cm long and 5 to 18 mm wide. It is flat, glabrous or barely pubescent, with scabrous and ciliated margin.
     
    Inflorescence

    The inflorescence is composed of 2 slender racemes (sometimes 3), 4 to 20 cm long, opposite and almost spreading, sessile or one of them with a very short peduncle.
     
    Spikelet

    The spikelets are solitary, shortly pedicellate, applied against the rachi. They are elliptical ovoid to orbicular, compressed dorsoventrally, with margin fringed with long silky hairs. They measure 1.4 to 2.2 mm long and are pale yellow in color. The lower glume is absent, the upper glume of the size of the spikelet, membranous, ciliated on the 2 marginal veins. The lower flower is sterile, formed by a lemma similar to the upper glume, but glabrous. The upper flower is fertile, lemma finely crustaceous, very finely streaked. The palea is similar, encased on the sides by the edges of the lemma.

    Grain

    The grain is suborbicular, 1,2 mm in diameter.

    Thomas Le Bourgeois
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      No Data
      📚 Natural History
      Life Cycle

      Life cycle

      Vivacious
      Vivacious

      Mayotte: Paspalum conjugatum flowers from October to May and fruits from November to June.

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        Reproduction
        Paspalum conjugatum is a vivacious grass that grows by its runners and multiplies by seeds.
        Thomas Le Bourgeois
        Attributions
        Contributors
        StatusUNDER_CREATION
        LicensesCC_BY
        References
          Morphology

          Growth form

          Tuft plant with narrow leaves
          Tuft plant with narrow leaves
          Prostrated
          Prostrated
          Running plant
          Running plant

          Leaf type

          Grass or grass-like
          Grass or grass-like

          Latex

          Without latex
          Without latex

          Stem section

          Flat section
          Flat section

          Root type

          Rhizome
          Rhizome
          Fibrous roots
          Fibrous roots

          Ligule type

          Ligule membranous large
          Ligule membranous large

          Stipule type

          No stipule
          No stipule

          Leaf attachment type

          with graminate sheathing
          with graminate sheathing

          Fruit type

          Grain of grasses
          Grain of grasses

          Lamina base

          sheathing grass-like broader
          sheathing grass-like broader

          Lamina apex

          attenuate
          attenuate

          Upperface pilosity

          Glabrous
          Glabrous
          Less hairy
          Less hairy

          Lowerface pilosity

          Less hairy
          Less hairy
          Glabrous
          Glabrous

          Simple leaf type

          Lamina linear
          Lamina linear

          Inflorescence type

          Bidigitate racemes
          Bidigitate racemes

          Life form

          Grass
          Grass
          Geophytic plant
          Geophytic plant
          Look Alikes

          Characters to distinguish several Paspalum species
           

          Racemes Raceme
          length
          Spikelet raws
           
          Spikelet size Spikelet shape Spikelet
          thickness
          Spikelet hairiness Species
          2(3) 1,5-7 cm 2 2,6-4 mm elliptical flattened glabrous P. vaginatum
          2(3) 1,5-9 cm 2 2,5-3,5 mm elliptical flat/convex barely cilited P. distichum
          2 4-20 cm 2 1,4-1,8 mm suborbicular flattened long and silky hairs P. conjugatum
          2-6 (15) 2-8 cm 2 1,3-3 mm suborbicular flat/convex glabrous P. scrobiculatum
          3-7 3-10 cm 4 2,8-3,8 mm ovale pointed flat/convex long and silky hairs P. dilatatum
          6-25 7-14 cm 4 2,2-2,7 mm ovale lanceolate flattened long and silky hairs P. urvillei
          8-50 4-12 cm 4 1,2-1,5 mm suborbicular flat/convex ciliate P. paniculatum
          Thomas Le Bourgeois
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            Ecology

            Paspalum conjugatum is a plant of open areas in forestry region, common along the edge of the slopes and drainage ditches, in fallow and marshy places.

            Comoros: Common species.
            Ivory Coast: Species mainly present in the forest zone and the coastal area but which is frequent in the area of Guinean savannas. It is common on forest edges, clearings, edges of tracks, drainage ditches, fallows.
            French Guiana: Common species in orchards, especially in citrus orchards with permanent plant cover.
            Madagascar: Species frequent in the whole area with warm and humid climate and rises in the Highlands up to 1200 m altitude. It is common along the roads, in forest edge, on loamy alluvium.
            Mauritius: This species grows in very humid places on the island, at forest edges, roadsides and occasionally in the sugar cane fields.
            Mayotte: Paspalum conjugatum is a fairly common cryptogenic species in freshwater, brackish and even salty wetlands, natural or secondarized. It is found in all wetlands.
            Reunion: Species rare in Reunion.
            Seychelles: Common species.
            West Indies: Paspalum conjugatum is an indigenous species. It grows in areas with high rainfall or on moist soils. It is relatively shade tolerant.

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              No Data
              📚 Habitat and Distribution
              Description

              Geographical distibution

              Madagascar
              Madagascar
              Reunion Island
              Reunion Island
              Comoros
              Comoros
              Mauritius
              Mauritius
              Seychelles
              Seychelles

              Origin

              Paspalum conjugatum is native to the old tropical world (Africa, India, South East Asia)

              Worldwide distribution

              Paspalum conjugatum is a pantropical species.

              Thomas Le Bourgeois
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                No Data
                📚 Occurrence
                No Data
                📚 Demography and Conservation
                Risk Statement

                Local harmfulness

                Comoros: Paspalum conjugatum is a noxious weed.
                Ivory Coast: It sometimes forms dense stands, almost monospecific.
                French Guiana: Locally abundant weed in fruit crops.
                Madagascar: Common weed in perennial crops (coffee, banana) where it forms dense carpets and ras, eliminating other species.
                Mauritius: It can seriously compete with the crop when it is present and well established in the sugar cane plots.
                Mayotte: Paspalum conjugatum is a common weed present in 9 % of cultivated plots. It is mainly present in fruit and pineapple crops. It is mainly present in the north of the island but it is also found in the center of the island.
                Reunion: Species not found in cultivation.
                Seychelles: Common but not harmful weed.
                West Indies: Paspalum conjugatum is particularly invasive in vegetable and food crops. It can be selected and controlled through mechanical mowing practices. It maintains a dense vegetation cover tolerant to trampling and machine traffic. Some banana growers select it as a cover crop between the rows of banana trees. However, care must be taken to manage it properly to avoid any competition with the associated crop.

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                  No Data
                  📚 Uses and Management
                  Uses

                  Fodder: Paspalum conjugatum is an excellent forage plant, very resistant to grazing and can produce hay of very good quality.
                  Medicinal: The cooked leaves are used in the treatment of heart diseases. The decoction is used as a compress to treat bruises.
                  Other: Paspalum conjugatum can have high concentrations of heavy metals and thus be used to clean up polluted industrial areas.

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                  AttributionsWiktrop
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                  StatusUNDER_CREATION
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                    No Data
                    📚 Information Listing
                    References
                    1. Poilecot, P. 1995. Les Poaceae de Côte-d'Ivoire. Conservatoire et jardin botaniques de Genève, Genève, Suisse.
                    2. Berton, A. (2020). Flore spontanée des cultures maraichères et fruitières de Guyane. Guide de reconnaissance des 140 adventices les plus communes des parcelles cultivées. Cayenne, Guyane, FREDON Guyane: 186.https://portal.wiktrop.org/document/show/173
                    3. https://www.feedipedia.org/node/407
                    4. Barthelat, F. 2019. La Flore illustrée de Mayotte. Meze, Paris, France, Collection Inventaires et Biodiversité, Biotope – Muséum national d’Histoire naturelle. 687 p.
                    5. Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontanée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
                    6. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30011315-2
                    7. Fournet, J. 2002. Flore illustrée des phanérogames de Guadeloupe et de Martinique. Montpellier, France, Cirad, Gondwana éditions.
                    8. Grossard, F., Le Bourgeois, T., Dumbardon-Martial, E. & Gervais, L. 2013. Adventilles - Guadeloupe & Martinique - Les adventices des Antilles françaises. Abymes, Guadeloupe, France, Les éditions du CTCS Guadeloupe. 195 p.
                    1. Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
                    1. Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
                    1. Le Bourgeois, T., A. Carrara, M. Dodet, W. Dogley, A. Gaungoo, P. Grard, Y. Ibrahim, E. Jeuffrault, G. Lebreton, P. Poilecot, J. Prosperi, J. A. Randriamampianina, A. P. Andrianaivo and F. Théveny (2008). Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien. Cédérom. Montpellier, France, Cirad ed.
                    2. Fournet, J. 2002. Flore illustrée des phanérogames de Guadeloupe et de Martinique. Cirad, Gondwana éditions, Montpellier, France.
                    Information Listing > References
                    1. Poilecot, P. 1995. Les Poaceae de Côte-d'Ivoire. Conservatoire et jardin botaniques de Genève, Genève, Suisse.
                    2. Berton, A. (2020). Flore spontanée des cultures maraichères et fruitières de Guyane. Guide de reconnaissance des 140 adventices les plus communes des parcelles cultivées. Cayenne, Guyane, FREDON Guyane: 186.https://portal.wiktrop.org/document/show/173
                    3. https://www.feedipedia.org/node/407
                    4. Barthelat, F. 2019. La Flore illustrée de Mayotte. Meze, Paris, France, Collection Inventaires et Biodiversité, Biotope – Muséum national d’Histoire naturelle. 687 p.
                    5. Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontanée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
                    6. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30011315-2
                    7. Fournet, J. 2002. Flore illustrée des phanérogames de Guadeloupe et de Martinique. Montpellier, France, Cirad, Gondwana éditions.
                    8. Grossard, F., Le Bourgeois, T., Dumbardon-Martial, E. & Gervais, L. 2013. Adventilles - Guadeloupe & Martinique - Les adventices des Antilles françaises. Abymes, Guadeloupe, France, Les éditions du CTCS Guadeloupe. 195 p.
                    9. Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1972. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain.
                    10. Johnson, D.E. 1997. Les adventices en riziculture en Afrique de l'Ouest. ADRAO/WARDA, Bouaké, Côte-d'Ivoire.
                    11. Le Bourgeois, T., A. Carrara, M. Dodet, W. Dogley, A. Gaungoo, P. Grard, Y. Ibrahim, E. Jeuffrault, G. Lebreton, P. Poilecot, J. Prosperi, J. A. Randriamampianina, A. P. Andrianaivo and F. Théveny (2008). Advent-OI : Principales adventices des îles du sud-ouest de l'Océan Indien. Cédérom. Montpellier, France, Cirad ed.
                    12. Fournet, J. 2002. Flore illustrée des phanérogames de Guadeloupe et de Martinique. Cirad, Gondwana éditions, Montpellier, France.

                    Etude floristique et phytoécologique des adventices des complexes sucriers de Ferké 1 et 2, de Borotou-Koro et de Zuenoula, en Côte d'Ivoire

                    Thomas Le Bourgeois
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                    Thomas Le Bourgeois
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                      No Data
                      🐾 Taxonomy
                      📊 Temporal Distribution
                      📷 Related Observations
                      👥 Groups
                      WIKTROP - Weed Identification and Knowledge in the Tropical and Mediterranean areasWIKTROP - Weed Identification and Knowledge in the Tropical and Mediterranean areas
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