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iamonico, D. 2009. First record of Amaranthus powellii subsp. powellii (Amaranthaceae) in Lazio Regio (Central Italy) with taxonomical, morphological, corologycal and ecological notes. Acta Botanica Malacitana. 34, (dic. 2009), 221–226. DOI:https://doi.org/10.24310/abm.v34i0.6910.