The indiscriminate vector: Human distribution ofDlchondra micrantha (Convolvulaceae)

摘要: The complex movements of humans, the variety organisms they purposefully and accidentally carry with them, taxonomic confusion have partly obscured transport this cultivated ornamental medicinal plant. Several lines evidence indicate an American origin for species. data include: (1) greatest species richness in Americas; (2) phylogenetic placement D. micrantha North taxa recurvata donelliana; (3) being only present Cuba; (4) Chinese names uses plants that suggest a recent adoption micrantha, perhaps because morphological similarity Centella asiatica. Dichondra was several parts Asia Americas by 1800s. Most these places were on sailing trade routes. Therefore, it appears has been moved around world humans 200–500 years. Humans continue spreading species, past few decades thousands pounds 2 × 1 mm seeds shipped annually companies.