Falcate
Hooked like a sickle or beak of a falcon.
Fascicle
A bundle or enclosure surrounding multiple parts (some evergreen needles, e.g. pines, are in a fascicle).
Fasciculate
Multiple leaves appearing bundled in a fascicle (such as on a pine).
Fastigiate
Branches erect and grown parallel, giving a broom-like appearance.
Fetid
Foul-smelling, rancid.
Fibrous Roots
Roots that are well branched, more thread-like, and scattered with no central leader (See also Taproot).
Filament
The stalk of the stamen that holds the anther on a male flower.
Flabellate
Fan-like, fan-shaped.
Flower
Reproductive part of plant consisting of one or more of the following: stamens, pistils, sepals or petals.
Foliage
All of the leaves of a plant.
Foliose
Leaf or leaf-like; small unfurled leaves without a bud scale.
Fringed
Decorative or stringy hairs along margin; can be seed, buds, leaves, etc (See also Tufted).
Funnelform
Funnel shaped; increasing in size from the base to the apex.