177In perennial section Bromopsis , widely introduced and weedy species are either
polyploid or both diploid and polyploid. The association of polyploidy with wide
introduction and weediness in the longer-lived sections Bromopsis and Ceratochloa
may also be related to extensive use of polyploid species for hay, forage, and reveg-
etation and for development of cultivars.
Fig. 6.5 Number of species that are diploid or polyploid in each taxonomic section of the Bromus
genus, for all introduction or impact categories combined ( left panels ) or separated ( right panels ).
Species may be both widely introduced and weedy and may be included in multiple weed
categories
6 Attributes That Confer Invasiveness and Impacts Across the Large Genus Bromus...