Synonyms:
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Common names:
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Field madder (English)
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Frequency:
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Rare |
Status:
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Introduced |
Description:
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Annual herb. Stems prostrate or decumbent, to 40 cm, ± glabrous with 4 rough angles. Lower leaves in whorls of 4, obovate-cuspidate; upper 5-18 mm, elliptic, acute; margin with forwardly directed prickles. Flowers 3 mm in diameter. Involucre of 8-10 lanceolate leaf-like bracts longer than the flowers. Sepals 4-6 mm, enlarging in fruit. Corolla 4-5 mm, pale lilac; tube c. twice as long as the 4 lobes. Fruit 4 mm, crowned by the calyx, of 2 obovoid mericarps with short rough bristles. |
Notes:
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A rare introduction, recorded only once as a weed of cultivation. |
Derivation of specific name:
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arvensis: of cultivated fields |
Habitat:
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Cultivated areas and disturbed ground |
Altitude range: (metres) |
1310 m |
Flowering time: | |
Worldwide distribution:
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Probably native to Europe, Mediterranean region and W Asia; widely escaped worldwide |
Zimbabwe distribution:
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N |
Growth form(s):
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Annual.
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Endemic status:
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Red data list status:
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Insects associated with this species:
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Spot characters:
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Display spot characters for this species |
Images last updated: |
Tuesday 12 June 2007 |
Literature:
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Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 74.
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