Features of genus those of family. Endarch stele with uni-biseriate bordered pits on secondary tracheids, and rays 1–2 cells wide, resin rodlets in ground tissues. Leaves amphistomatic; adaxial surface with two long stomatal bands each 4–8 stomatal complexes wide with some shared subsidiary cells, diminishing to single rows or scattered stomata near tip of small leaves; abaxial surface with two shorter basal bands or scattered basal stomata. Stomata monocyclic with unipapillate subsidiary cells. Pollen cones cylindrical-elongated with herbaceous axis; sporophylls with narrow shank and keeled distal lamina; numerous pollen sacs attached to adaxial surface of sporophyll shank. Ovuliferous dwarf shoots with one or more narrow sporophylls recurved near apex, each bearing one inverted terminal ovule. Embryos polycotyledonary.
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