antennaria

from WordNet (r) 3.0 (2006)

Antennaria
    n 1: small woolly perennial herbs having small whitish discoid
         flowers surrounded by a ring of club-shaped bristles [syn:
         {Antennaria}, {genus Antennaria}]

from The Collaborative International Dictionary of English v.0.48

Immortelle \Im`mor*telle"\, n.; pl. {Immortelles}. [F. See
   {Immortal}.] (Bot.)
   A plant with a conspicuous, dry, unwithering involucre, as
   the species of {Antennaria}, {Helichrysum}, {Gomphrena}, etc.
   See {Everlasting}.
   [1913 Webster]