WordNet (r) 3.0 (2006):

old man of the mountain
    n 1: whitish hairy plant with featherlike leaves and a few stout
         stems each bearing an especially handsome solitary large
         yellow flower head; mountainous regions north central
         United States [syn: old man of the mountain, alpine
         sunflower, Tetraneuris grandiflora, Hymenoxys
         grandiflora]