Floral Anatomy and Morphology of Anemopsis californica

The flower of Anemopsis californica, subtended by a small floral bract, consists of six stamens, three carpels, and an ovary completely buried in the inflorescence axis. 2. The vascular supply of the individual flower and its bract originates in a single bundle of the ring of bundles in the inflorescence axis. This bundle splits up into seven: the bract bundle and three stamen bundles alternating with three placental ones. 3. Above the ovary the stamen and placental bundles branch and anastomose in such a way as to provide one bundle for each stamen and three for each style. 4. The ovule is orthotropous, with two integuments and an eventually massive nucellus. The outer integument is initiated first. Both integuments exhibit certain differentiations in their cell layers. 5. The megaspore mother cell, which with two parietals arises from a hypodermal cell, divides twice, but a wall is formed only after the first division. 6. The pair of megaspores in the upper cell degenerate and the megametophyte is formed after two more nuclear divisions of the two megaspores in the lower cell. 7. The polar nuclei fuse in the chalazal end of the megagametophyte before fertilization. 8. The antipodals have usually disappeared or are degenerating before fertilization.