title: Eutrema salsugineum(Cruciferae) new to Mexico: a surprising generic record for the flora of Middle America.
abstract: The paper reportsEutrema salsugineumas a novelty to the flora of Mexico and Middle America in general. The finding stands ca. 1600 km apart from the closest known locality in the Rocky Mountains of Colorado, USA. The species is considered native to NW Mexico and its late discovery in the region is presumably explained by its tiny habit, early flowering time, and subephemeral life cycle. The phylogenetic position of this Mexican population in a haplotype network based on the chloroplast DNA fragmentpsbA-trnH confirms this hypothesis and also suggests, in contrast to the previously held viewpoint, multiple colonizations of North American continent from Asia.
authors.affiliation: Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany; South-Siberian Botanical Garden, Altai State University, Lenin Str. 61, 656049 Barnaul, Russia.
authors.forename: Dmitry A
authors.initials: DA
authors.lastname: German
authors.affiliation: Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, Heidelberg University, Im Neuenheimer Feld 345, D-69120 Heidelberg, Germany.
authors.forename: Marcus A
authors.initials: MA
authors.lastname: Koch
keywords: Brassicaceae; Thellungiella; floristic finding; geographic disjunction; halophyte; model species; native distribution range