Are Asteraceae 1.5 billion years old? A reply to heads.
Department of Phanerogamic Botany, Swedish Museum of Natural History, PO Box 50007, 10405 Stockholm, Sweden. ulf.swenson@nrm.se
Ulf
U
Swenson
Stephan
S
Nylinder
Steven J
SJ
Wagstaff
D000818:Animals; D019659:Asteraceae / Q000145:classification*; D010802:Phylogeny