The Collaborative International Dictionary of English v.0.48:

Coniferous \Co*nif"er*ous\, a.
   (a) Bearing cones, as the pine and cypress.
   (b) Pertaining to the order Coniferae, of which the pine
       tree is the type.
       [1913 Webster]

WordNet (r) 3.0 (2006):

coniferous
    adj 1: of or relating to or part of trees or shrubs bearing
           cones and evergreen leaves [syn: coniferous, cone-
           bearing]