Why ciliate-margined petioles matter

Solidago simplex, June 22, 2021

Solidago simplex, June 22, 2021

Common & scientific name
Sticky goldenrod, Solidago simplex

Family
Sunflower, Asteraceae

Location
Roadside, 9,200’

Fun, weird, helpful, or little known fact
The only sure-fire method of distinguishing this from the other look-a-like goldenrod on the Pass, Solidago multiradiata, is to look at the petioles (the leaf stems) to see if they are ciliate-margined (have hairs sticking straight out on their edges): this plant does not. Below is its alpine variation, S. simplex var. nana.

Solidago simplex var. nana, Linkins Lake Trail, 12,000’, July 21, 2021

Solidago simplex var. nana, Linkins Lake Trail, 12,000’, July 21, 2021