Variety filipes is known only from Mexico.

Plant: Annual forb to 15 cm; stems capillary, dichotomously branching Leaves: leaves opposite, linear, 1-3 cm long, gland-dotted Flowers: flower heads 7mm high borne singly at branch tips on long peduncles, phyllaries in one series; yellow ray flowers only, 4-6 mm long; pappus of 2-4 antrorsely hispid awns.