What's the difference between gumweed and tarweed?
Gumweed
Definition:
Example Sentences:
Tarweed
Definition:
(n.) A name given to several resinous-glandular composite plants of California, esp. to the species of Grindelia, Hemizonia, and Madia.
Example Sentences:
(1) Maximally parsimonious trees from ITS and chloroplast DNA data all suggest (a) origin of the monophyletic Hawaiian silversword alliance from a California tarweed ancestor, (b) closer relationship of the Hawaiian species to Madia and Raillardiopsis than to Adenothamnus or Raillardella, (c) paraphyly of Raillardiopsis, a segregate of Raillardella, and (d) closer relationship of Raillardiopsis to Madia and the silversword alliance than to Raillardella.
(2) Phylogenetic relationships among ITS sequences of Hawaiian silversword alliance species (Argyroxiphium, Dubautia, and Wilkesia) and California tarweed taxa in Adenothamnus, Madia, Raillardella, and Raillardiopsis are highly concordant with a chloroplast DNA-based phylogeny of this group.