A weed or not a weed? Many plant species grow somewhere on the continuum from undisturbed to very disturbed vegetation. Deciding on the degree of weediness is not an easy task, and often based only on subjective observations. In this work, we compare data obtained during systematic field surveys with the habitats recorded on herbarium specimen labels, for a group of more-or-less weedy tropical species. We show that herbarium data reflect the collection bias favouring natural vegetation, but also, that the relative weediness hierarchy stays in place. The study is relevant for other ecological studies based on herbarium specimens.
Se designa el lectotipo de Diphysa sennoides Bentham (1853: 12) y se excluyen los otros sintipos determinados como Diphysa floribunda Peyritsch (1859: 78) y Diphysa carthagenen sis Jacquin (1760: 28; 1763: 208). Palabras clave: Coulter, lectotipo, México. The lectotype of Diphysa sennoides Bentham (1853: 12) is designated and the other syntypes determined as Diphysa floribunda Peyritsch (1859: 78) and Diphysa carthagenensis Jacquin (1760: 28; 1763: 208) are excluded.
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