frostweed: perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts
helianthemum: any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions
residual: (often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing