I'm reading a recent reprint of Maud Hart Lovelace's first novel, "The Black Angels", originally published in 1926! And, knowing how the author almost always put goldenrod into her books, I had my eye out for goldenrod!
To be honest, I hadn't really been thought about the goldenrod in these books until I read "The Betsy-Tacy Companion" by Sharla Scannell Whalen. It was just there, so familiar as to be almost unnoticed.