On The Origin of Species by Charles Darwin Chapter 16 Page 16

— The totality of the plants growing naturally in a country, or during a given geological period.

FLORETS. — Flowers imperfectly developed in some respects, and collected into a dense spike or head, as in the Grasses, the Dandelion, etc.

FOETAL. — Of or belonging to the foetus, or embryo in course of development.

FORAMINIFERA. — A class of animals of very low organisation and generally of small size, having a jelly-like body, from the surface of which delicate filaments can be given off and retracted for the prehension of external objects, and having a calcareous or sandy shell, usually divided into chambers and perforated with small apertures.

FOSSILIFEROUS. — Containing fossils.