Pluchea spp. (camphorweeds)
Pulicaria spp. (false fleabane), especially common fleabane (Pulicaria dysenterica subsp. dysenterica, formerly Inula dysenterica)
Erigeron spp., especially Erigeron acre (blue fleabane)
Inula spp. (yellowheads)
Also, in subfamily Cichorioideae, Vernonia spp. (ironweeds).
Conyza spp. (butterweeds or horseweed)
mostly in two tribes of subfamily Asteroideae
Stachys byzantina, an ornamental low-growing perennial related to betony with soft, silky hairs on the leaves which give it an attractive silvery-gray color.
Used other than figuratively or idiomatically: see lamb, ear.