An illustration of the seed of the field scabious. Knautia arvensis, commonly known as Field Scabious,…
An illustration of the valerian seed with attached pappus. In a composite flower, Pappus is the part…
"Centranthus ruber. 1. a corolla; 2. section of ovary; 3. ripe fruit, with its pappus; 4. cross section…