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
alopecia: loss of hair (especially on the head) or loss of wool or feathers; in humans it can result from heredity or hormonal imbalance or certain diseases or drugs and treatments (chemotherapy for cancer)