Hybrid Tumbleweeds

In another couple months the tumbleweeds will be rolling along in the western United States.  Wells and Ellstrand (2016) at the University of California – Riverside documented a new hybrid species of tumbleweed, Salsola ryanii, rapidly expanding its range.  Salsola ryanii is an allopolyploid species with 2 complete sets of genes from its parent species, S. tragus and S. australis.

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