Wild Chamomile, Sweet False Chamomile: Matricaria chamomilla (Synonym: Matricaria recutita) - Flower heads with both disc and ray flowers.
Disc Mayweed, Pineapple Weed: Matricaria discoidea (Synonyms: Chamomilla suaveolens, Matricaria matricarioides) -
Scentless Mayweed, Scentless Chamomile: Tripleurospermum inodorum (Synonyms: Matricaria maritima, Matricaria perforata, Tripleurospermum perforatum) - Flower heads with both disc and ray flowers.
Valley Pineapple Weed: Matricaria occidentalis (Synonym: Chamomilla occidentalis) -