The third member of the clan is a rather dainty, smaller plant called erodium.

The larvae feed on the leaves of Erodium species.

Some species have been called "alfilerillo", a Spanish name for the common and well-known genus Erodium.

It mainly feeds on Compositae and Erodium species.

Erodium cicutarium, introduced from Spain to America.

Erodium brachycarpum is a species of flowering plant in the geranium family known by the common name shortfruit stork's bill.

Erodium cicutarium ssp.

Erodium cicutarium (redstem stork's bill) Poultice of chewed root applied to sores and rashes.

Erodium species are used as food plants by the larvae of some Lepidoptera species including Pasture Day Moth.

Other former members of the genus are now classified in genus Erodium, including the plants known as filarees in North America.

It once was believed that Erodium was a serious threat to the sphinx moth because of larval mortality after eggs were mistakenly deposited on this plant.

Carl Linnaeus grouped in the same genus (Geranium) the three similar genera Erodium, Geranium, and Pelargonium.

Genus: Rhynchotheca, Monsonia, Geranium, Erodium, Pelargonium Ordo 47.

The larvae feed on various herbaceous plants, including Arctotheca calendula, Onopordum acaulon, Lupinus nanus, Medicago sativa, Erodium species and Zaluzianskya divaricata.

Erodium texanum, also known as Texas Filaree, Texas Stork's Bill, or Heronbill, is a flowering plant which is native to the southwestern United States and northern Mexico.

In other habitats Dove's-foot Cranesbill Geranium molle and Common Stork's-bill Erodium cicutarium are used and possibly other Geranium spp.

Erodium cicutarium, also known as Redstem filaree, Common Stork's-bill, Pinweed is an herbaceous annual, and in warm climates a biennial member of the Geranium Family of flowering plants.

The distinction between them was made by Charles Louis L'Héritier de Brutelle based on the number of stamens or anthers: five for Erodium, seven for Pelargonium, and ten for Geranium.