Least Tarweed, Smallhead Tarweed, Small-head Tarweed: Hemizonella minima (Synonyms: Hemizonia minima, Madia minima) -
Threadstem Madia, Little Tarplant, Little Tarweed: Madia exigua
Mountain Tarweed, Cluster Tarweed, Clustered Tarweed, Stinking Tarweed, Mountain Tarplant: Madia glomerata -
Common Tarweed, Grassy Tarplant, Grassy Tarweed, Gum-weed, Slender Tarweed: Madia gracilis (Synonyms: Madia gracilis ssp. gracilis, Madia dissitiflora) -