184
Table 6.5Species of concern in the Western United StatesSpecies categorized as invasive and present in the Western United StatesSome other species of possible concern for the Western United StatesSectionSpeciesSectionSpeciesCommentBromusBromus arvensisBromusBromus alopecurusIntroduced in California and other parts of the United States and weedyCeratochloaBromus catharticusBromusBromus arenariusIntroduced into the Western United States and weedy; may be a hybrid between grasses in sectionsBromusandGeneaCeratochloaBromus cebadillaNeobromusBromus berteroanus
(syn.Bromus trinii)^Introduced into the Western United States and weedyGeneaBromus diandrusBromusBromus briziformisIntroduced into the Western United States and weedyBromopsisBromus erectusBromusBromus commutatusIntroduced into the Western United States and weedyBromusBromus hordeaceusBromusBromus danthoniaeWeedy elsewhereBromopsisBromus inermisBromusBromus lepidusIntroduced into the Eastern United States and weedy; may be distributed as a contaminant in grass seed mixes used for revegetationBromusBromus japonicusBromusBromus pectinatusCrop and ruderal weed in Africa; may be a hybrid between grasses in sectionsBromusandGeneaBromusBromus lanceolatusBromusBromus scopariusIntroduced into the Western United States and weedyGeneaBromus madritensisGeneaBromus sericeusSimilar to highly invasiveBromus tectorum; adapted to arid habitatsBromusBromus racemosusGeneaBromus rigidusGeneaBromus rubensBromusBromus squarrosusGeneaBromus sterilisGeneaBromus tectorumSpecies categorized as invasive are those introduced to two or more biogeographic realms outside of their native range and also as an environmental weed.Other species may also be of management concern (Smith1968; Wilcox1986; Sales1991; Taa et al.2004; Oja2007; Saarela et al.2007; United StatesDepartment of Agriculture NRCS2011; Angelo and Boufford2013)S.Y. Atkinson and C.S. Brown