2/11 Temperate or Subtropical, E.
Plant families cited as sources of medicinal agents include Apocynaceae, Cephalotaxaceae
, Compositae, Euphorbiaceae, Leguminosae, Papaveraceae, Phytolaccaceae, Ranunculaceae, Rubiaceae and Solanaceae (Gentry, 1993).
Conifers with an evident ovuliferous scale could be derived from the Lebachia type and the Cephalotaxaceae from the Ernestiodendron type.
Group 2 Conifers: Araucariaceae, Cephalotaxaceae, Pinaceae, Podocarpaceae
The microsporangiate strobilus of gymnosperms is simple, but within the Taxaceae and the Cephalotaxaceae there are clear examples of compound pollen strobili, and those that appear simple are currently interpreted to be reduced compound structures (Keng, 1969; Wilde, 1944, 1975).
In recognition of differing origins of these features of the female reproductive structure, the two genera are now placed in the Cephalotaxaceae and the Podocarpaceae, respectively.
The same applies to ruminate storage tissues of gymnospermous seeds, as reported for Araucariaceae (Coulter & Chamberlain, 1910), Gnetaceae (Schnarf, 1933), Phyllocladaceae (Coulter & Chamberlain, 1910), Taxaceae (Oliver, 1902; Coulter & Land, 1905; Lotsy, 1911), and, less pronounced, Cupressaceae, Ephedraceae, and Cephalotaxaceae