The Collaborative International Dictionary of English v.0.48:

Asterophyllite \As`ter*oph"yl*lite\
   ([a^]s`t[~e]r*[o^]f"[i^]l*l[imac]t), n. [Gr. 'asth`r star +
   fy`llon leaf.] (Paleon.)
   A fossil plant from the coal formations of Europe and
   America, now regarded as the branchlets and foliage of
   calamites.
   [1913 Webster]