falcate
Hooked or curved like a sickle.
fastigiate
Branches erect and close to central axis.
fen
A type of wet land that accumulates peat deposits. Fens are less acidic than bogs, deriving most of their water from groundwater rich in calcium and magnesium.
ferrugineous
Rust–like (a colour term).
fertile frond
Fronds that bear sporangia.
filamentous
Resembling a filament.
filiform
Thread like, resembling a filament.
filiramulate
Branching at a very wide angle with stiff intertwined stems.
fimbriae
Plural of fimbria: Fringe. A fimbria is composed of many fimbrillae (individual hair-like structures).
fimbriate
With fringes.
flabellate
Fan shaped.
flaccid
Limp, not rigid, flabby.
flange
A projecting rim.
flexuose
With curves or bends.
floccose
Having tufts of soft woolly hairs.
floret
A small flower, usually one of a cluster - the head of a daisy for example.
foliaceous
Leaf-like.
foliolate
Having leaflets.
founder effect
When a small number of plants (and therefore their genes) from a larger population are selected some genetic information is lost.
frond
A leaf, the complete leaf of a fern including the stipe and lamina.
fulvous
Orange–yellow.
funneliform
Funnel-shaped.
fusiform
Broadest near the middle and tapering toward both ends.
