Sep. 14, 2018

giant ragweed, Ambrosia trifida

Guilty! Guilty! Guilty! Ragweeds are one of the primary causes of hay fever. Despite their perennial attempts to scapegoat goldenrod, we know which the culprit is. At least they get a death sentence - since they are annuals. Actually, for an annual they're pretty amazing. Giant ragweed, in the right conditions, can get twenty feet tall in its one season. What on earth possessed Linnaeus in 1753 to name this Ambrosia? Food of the Gods? Strange humor. Giant ragweed grows in every state except NV, in AB, BC, MB, NB, NS, ON, PE, QC, SK, and Mexico. It is now marching across Eurasia. Lenawee Co MI, 8/18/10.