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The neotropical grass panicum laxum Sw. now colonizing tropical grass-herb swamps in West Africa, shows seed germination characteristics of weedy species. These characteristics include dark inhibition, rapid germination, high germination rate and a high intraspecific variation in germination potential in the light. P. Laxum also exhibits enhanced seed germination under flooded conditions and at low radiant energy flux hence its success in competing with indigenous swamp species.
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N. H. Ayodele Cole (1977) studied this question.
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