Falcate:- Curved like a scythe or sickle. sickle-shaped.
Farinose:- Covered with a meal-like powder  powdery covering.
Fascicle:- A cluster of similar organs (e.g leaves or flowers) arising from more
or less the same point.
Fasciculate:- see Fastigiate
Fastigiate:-Erect and closely parallel, ‘bundled’, and coming from a common
point. (of branches).
Farina:- Powdery or woolly deposits found on the surface of leaves.
Fid:- Preceded by a number eg.3-fid. Indicating the number of component
parts i.e 3-fid; lobes, (with 3 lobes).
Filament:- The stalk of a stamen, connecting the receptacle to the anther.
Filiform:- Thread-like; slender and parallel-sided.
Fimbriate:- Fringed by rather broad hair-like processes (as distinct from hairs
or slender spines). fringed with broad hair-like processes
Fistular:- Tubular.
Flabellate:- Fan-shaped.
Flexuous, flexuose:- Wavy.
Floccose:- Covered with woolly tufts of hairs that rub off easily.
Floccose - Tomentose Covered with short, dense, matted woolly tufts of
Flowerhead:- Refers to flowers which are aggregated into tight, formal heads,
as in members of the daisy and scabious families. The individual flowers of a
flowerhead may be all of the same kind or 2-3 distinct types.
Floret:- The individual flowers that make up a flowerhead.
Foetid:- With a strong and unpleasant smell.
Foliaceous:- Leaf-like.
Foliolate:- Having leaflets.
Follicle:- A dry, dehiscent fruit developed from a single carpel. Fol­licles may
be solitary or clustered together.
Foveolate:- Minutely pitted, with small depressions
Free:- Not joined to one another.
Fruit:- The seeds and the structures that contain them, whether dry or fleshy.
Fugacious:- FalIing off early; fugaceous is a preferred spelling
Funicles:- The stalk of the ovule or seed attaching it to the placenta, seed
Furcate:- Forked with sharp terminal lobes.
Fusiform:- Thick but tapering towards both ends, spindle-shaped.