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Jeffrey G. Norcini and James H. Aldrich

, germination of Parthenium argentatum Gray (Asteraceae) was enhanced more by GA 3 (200 mg·L −1 ) when seeds were scarified for 2 h in sodium hypochlorite compared with nonscarified seeds treated with GA 3 ( Naqvi and Hanson, 1980 ). The inability of moist

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G.A. Picchioni, Wayne A. Mackay and Mario Valenzuela-Vázquez

, and minerals, and to prepare quantitative balances of the resources between sink and source. Materials and Methods Greenhouse cultivation and raceme harvest. Seeds of L. havardii ‘Texas Sapphire’ were scarified, sown in flats, and