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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

Crotalaria ochroleuca G.Don

Accepted
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
Crotalaria ochroleuca G.Don
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🗒 Synonyms
synonymCrotalaria cannabina Baker f.
synonymCrotalaria intermedia Sensu auct.
synonymCrotalaria lanceolata Sensu auct.
🗒 Common Names
Malagasy
  • Kirintsana (Hautes terres et Moyen-ouest)
📚 Overview
Overview
Brief
Code

CVTOC

Growth form

broadleaf

Biological cycle

annual

Habitat

terrestrial

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ravi luckhun
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    Diagnostic Keys
    Description
    Global description
     
    Crotalaria ochroleuca is an annual or short lived perennial, erect herb, slightly branched at the base, 50 cm to 1.5 m high. The leaves are alternate, compound, trifoliate, leaflets linear to linear-elliptic. The inflorescences are terminal erect racemes, 10 to 50 cm long. The papilionaceous type flowers are pale yellow or cream streaked in red, with an elongated spout keel, pale green, streaked with brown, blackish towards the summit. The fruits are cylindrical pods, pendulous, many-seeded, about 3.5 mm long, pale yellow or orange.                                                                                                      
    Cotyledons
     
    The cotyledons are kidney-shaped, sub sessile, and 10 to 14 mm long.
     
    First leaves
     
    First leaves firstly unifoliate then trilofoliate with linear-elliptical leaflets bearing petioles shorter than the leaflets.
     
    General habit
     
    Annual or perennial short life plant, erect, more or less branched at the base, reaching 1.5 to 2 m high.
               
    Underground system
     
    Taproot.
     
    Stem
     
    The stem is cylindrical, more or less woody at the base; young stems and branches are covered with appressed short hairs.
     
    Leaf
     
    The leaves are alternate, compound trifoliate, with petioles 1 to 6 cm long, leaflets linear to lanceolate or elliptic-lanceolate, 5 to 13 cm long and 0.5 to 2 cm wide, glabrous and green on upper surface and grayish puberulous on the underside.
     
    Inflorescence
     
    The inflorescences are erect terminal, loose racemes, 20 to 50 cm long; linear to subulate bracts are2 to 4 mm long.
     
    Flower
     
    The papilionaceous type flowers include: a calyx in cupped shape with 5 lobes, 6 to 8 mm long, truncated at the base and reflected towards the pedicel;  corolla cream to pale yellow in colour,  oval standard pale yellow or cream veined with reddish or brown,, creams or purple wings, normally shorter than the elongated spout hull, 1.8 to 2.2 cm long, pale green streaked with brown to blackish trend towards the top; 10 stamens gathered in an open sheath at the base and a superior ovary unilocular with curved style.
     
    Fruit
     
    The fruit is a sub-sessile pod, largely cylindrical, 3 to 5 cm long and 1.5 cm wide, pendulous, depressed following the upper suture line, appressed puberulous, black when dry, containing up to 100 seeds.
     
    Seed
     
    The kidney-shaped seeds are quite variable in size, typically about 3.5 mm long, smooth, pale yellow to orange in colour. 
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      📚 Natural History
      Life Cycle

      Life cycle

      Annual
      Annual
      Perenial
      Perenial

       Madagascar: Crotalaria ochroleuca blooms and bears fruit from January to April.


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        Cyclicity
        Crotalaria ochroleuca is an annual or perennial species of short life that is propagated by seeds. They are dispersed by water and tillage tools.
         

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          Morphology

          Leaf type

          Compound
          Compound

          Compound leaf type

          Trifoliate leaf
          Trifoliate leaf

          Latex

          Without latex
          Without latex

          Root type

          Taproot
          Taproot

          Stipule type

          Lanceolate stipule
          Lanceolate stipule

          Pod type

          Cylindrical pod in section
          Cylindrical pod in section

          Lamina apex

          acute
          acute
          obtuse
          obtuse
          mucronate
          mucronate

          Inflorescence type

          Raceme with alternate sessile flowers
          Raceme with alternate sessile flowers

          Stem pilosity

          Dense hairy
          Dense hairy

          Stem hair type

          Short and long hairs mixed
          Short and long hairs mixed

          Life form

          Broadleaf plant
          Broadleaf plant
          Shrub
          Shrub
          Look Alikes

          Identification key of Crotalaria

          (Crotalaria species have kidney-shaped seeds contained in large cylindrical pods)

          Prostrate plant C. ononoides
          Erect plant leaf simple C. retusa
          leaf digitate C. grahamiana
          leaf trifoliolate stipules large and falciform C. goreensis
          stipules filiform or absents petiole longer than the leaf C. incana
          petiole shorter than the leaf fleaflets elliptic to oboval C. pallida
          leaflets lanceolate to filiform C. ochroleuca
          Thomas Le Bourgeois
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            Ecology

            Madagascar: Crotalaria ochroleuca develops on ferralitic soils, more or less humiferous or of volcanic origin, well drained alluvial soil, fertile enough in sunny places. It is a weed of rainfed crops, the edges of paths and cultures in fallows and pastures near shoals between 800 and 1200 m. It occurs in cropping systems of maize or upland rice, semi-intensive in areas of the Middle West and Upland.

            Mauritius: Absent.
            Reunion: Absent.
             
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              📚 Habitat and Distribution
              General Habitat

              Habitat

              Terrestrial
              Terrestrial
              Origin
               
              Crotalaria ochroleuca is native to tropical Africa.
               
              Worldwide distribution
               
              Tropical Africa, Madagascar, introduced and naturalized in North America and Brazil, China and Australia.
               

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                No Data
                📚 Occurrence
                No Data
                📚 Demography and Conservation
                Risk Statement
                Local harmfulness
                 
                Madagascar: Crotalaria ochroleuca is a weed recently introduced and naturalized in Madagascar; it is relatively infrequent but sometimes locally abundant in rainfed corps at medium altitude particularly in the Middle West region. C. ochroleuca produces a significant quantity of seeds whose germination can be phased in beginning of the rainy season. It is locally abundant in maize cropping systems and rainfed rice.
                Mauritius: Absent.
                Reunion: Absent.

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                  📚 Uses and Management
                  Uses
                  Food: The leaves and young shoots can be used as wild vegetable.

                  Agricultural: Crotalaria ochroleuca can be used as green manure to improve soil fertility. This species can also be used as a trap crop to fight against Striga and as control management against nematodes.

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                    Management

                    Local control

                     
                    Madagascar: In the Middle West of Madagascar, Crotalaria ochroleuca is controlled with manual weeding to angady.
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                      📚 Information Listing
                      References
                      1. DU PUY D. J., LABAT J. N., RABEVOHITRA R., VILLIERS J. F., BOSSER J. & MOAT J., 2002 – The Leguminoseae of Madagascar. ROYAL BOTANIC GARDENS, Kew, 2002, p 699.
                      2. Catalogue des plantes vasculaires de Madagascar : http://www.efloras.org/florataxon.aspx?flora_id=12&taxon_id=242315564
                      Information Listing > References
                      1. DU PUY D. J., LABAT J. N., RABEVOHITRA R., VILLIERS J. F., BOSSER J. & MOAT J., 2002 – The Leguminoseae of Madagascar. ROYAL BOTANIC GARDENS, Kew, 2002, p 699.
                      2. Catalogue des plantes vasculaires de Madagascar : http://www.efloras.org/florataxon.aspx?flora_id=12&taxon_id=242315564
                      Images
                      Thomas Le Bourgeois
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                        No Data
                        🐾 Taxonomy
                        📊 Temporal Distribution
                        📷 Related Observations
                        👥 Groups
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