) is used to treat acute and chronic myeloid leukemia (Cragg and Newman, 2005; Kantarjian et al., 1996).
Cephalotaxine, which has remarkable anticancer effect, is produced by plants of the genus Cephalotaxus (Cephalotaxaceae
Non-saccate, in the cupresso-taxads (i.e., Sciadopityaceae, Cupressaceae--including Taxodiaceae, Taxaceae and Cephalotaxaceae; all with the same distinctive hydrodynamic response described below (Fig.
Temperate Cephalotaxaceae 2/11 Temperate or Subtropical, E.
Kuishi, on Cephalotaxus harringtonia (Cephalotaxaceae
), 30 Jul 2002, T.
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.
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).
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