What are your go-to plants?" "Look up native Asters (Symphyotrichum), Goldenrods (Solidago), and Sunflowers (Helianthus) species. They are the most important wildflowers for pollinators.

What are ways species exchange genes with each other? Hybridization and gene flow are shortcuts to biodiversity that don’t always involve differentiation.

Populations inhabiting two sites near Boulder, Colorado were associated with the sunflower, Helianthus pumilus. This leads one to suspect that among the 13 species of Helianthus distributed on the ...