Cichorium intybus, a somewhat woody perennial herbaceous plant of the dandelion family, many varieties of which are cultivated for salad leaves.
Also, in subfamily Cichorioideae, Vernonia spp. (ironweeds).
Pulicaria spp. (false fleabane), especially common fleabane (Pulicaria dysenterica subsp. dysenterica, formerly Inula dysenterica)
Erigeron spp., especially Erigeron acre (blue fleabane)
Inula spp. (yellowheads)
Conyza spp. (butterweeds or horseweed)
mostly in two tribes of subfamily Asteroideae
Pluchea spp. (camphorweeds)