The Collaborative International Dictionary of English v.0.48:

Helipterum \Helipterum\ n.
   genus of South African and Australian herbs or shrubs grown
   as everlastings; the various Helipterum species are
   currently in process of being assigned to other genera,
   especially Pteropogon and Hyalosperma.

   Syn: genus Helipterum.
        [WordNet 1.5] Helispheric

WordNet (r) 3.0 (2006):

Helipterum
    n 1: genus of South African and Australian herbs or shrubs grown
         as everlastings; the various Helipterum species are
         currently in process of being assigned to other genera
         especially genera Pteropogon and Hyalosperma [syn:
         Helipterum, genus Helipterum]