[4] The best known of these is rush skeletonweed (Chondrilla juncea), a noxious weed established in Africa, Australia, and the Americas.

[5] Chondrilla species produce one or more stems up to 1.5 meters tall from a taproot which can be very deep and highly branched.

The basal and lower stem leaves are divided and toothed, and are borne on winged petioles.

The cylindrical flower heads are often solitary but may grow in clusters, and are located along the branches and at the ends.

Plants of both genera undergo apomixis, producing fertile seeds via asexual reproduction.