Asters, Groundsels, and especially Thistles, afford most familiar examples of a hairy or downy pappus; those of thistles, &c.

The flowers are insect pollinated, and various thistle species are widely known as important food sources for butterflies, as ...

Thistles are a marvelous group of plants. Botanists place them all as members of the sunflower (or aster) family, which is a ...

Thistles are a marvelous group of plants. Botanists place them all as members of the sunflower (or aster) family, which is a ...