Glossary: F
- FAC
- Facultative: plant is equally likely to occur in wetlands or non-wetlands (probability 34%-66%).
- FAC+
- Facultative: plant is equally likely to occur in wetlands or non-wetlands (probability 34%-66%). Plus sign indicates tendency toward the higher end of the category (more frequently found in wetlands).
- FAC-
- Facultative: plant is equally likely to occur in wetlands or non-wetlands (probability 34%-66%). Minus sign indicates tendency toward the lower end of the category (less frequently found in wetlands).
- FACU
- Facultative Upland: plant usually occurs in non-wetlands (probability 67-99%), but occasionally found in wetlands (probability 1%-33%).
- FACU+
- Facultative Upland: plant usually occurs in non-wetlands (probability 67-99%), but occasionally found in wetlands (probability 1%-33%). Plus sign indicates tendency toward the higher end of the category (more frequently found in wetlands).
- FACU-
- Facultative Upland: plant usually occurs in non-wetlands (probability 67-99%), but occasionally found in wetlands (probability 1%-33%). Minus sign indicates tendency toward the lower end of the category (less frequently found in wetlands).
- Facultative Upland
- Usually occurs in non-wetlands but may occur in wetlands where soils are rarely saturated.
- Facultative Wetland
- May occur in non-wetlands, but usually occurs in settings where water saturates the soil or floods the soil surface at least seasonally.
- FACW
- Facultative Wetland: plant usually occurs in wetlands (probability 67%-99%), but occasionally found in wetlands.
- FACW+
- Facultative Wetland: plant usually occurs in wetlands (probability 67%-99%), but occasionally found in wetlands. Plus sign indicates tendency toward the higher end of the category (more frequently found in wetlands).
- FACW-
- Facultative Wetland: plant usually occurs in wetlands (probability 67%-99%), but occasionally found in wetlands. Minus sign indicates tendency toward the lower end of the category (less frequently found in wetlands).
-
falcate
- Sickle-shaped.
-
false indusium
- A flap of unspecialized tissue, such as an inrolled leaf edge, that covers and protects the sorus of a fern.
- family
- The grouping in a taxonomic hierarchy that encompasses related genera.
- farina
- Inflated hairs that create a mealy coating on a surface.
- farinose
- With a mealy coating.
-
fascicle
- Compact cluster.
-
fasciculate
- With leaflets or needles in a bundle or compact cluster.
- Federal Endangered Species Act
- Environmental legislation signed into law by President Richard Nixon in 1973, designed to protect critically imperiled species from extinction.
-
fenestrate
- With openings or window-like slits.
- fens
- Calcium-rich wetlands.
-
fern
- A non-flowering plant that produces spores, which themselves germinate to form sexual plantlets whose offspring in turn become the spore-bearing plant.
-
fibrillose
- Separating into fibers (fibrous).
-
filament
- The stalk supporting the pollen-bearing structure (anther).
-
filiform
- Thread-like.
-
fimbriate
- Fringed.
-
flabellate
- Fan-shaped.
-
fleshy
- Succulent, with a high water content.
-
flexuous
- Sinuous, curving alternately in different directions.
- floodplains
- An area adjacent to a river or a stream which floods during periods of high discharge .
- floret
- Small or single flower (disk or ray floret in Asteraceae, flower plus lemma and palea in Poaceae).
-
floricane
- Second-year flowering stem of Rubus.
-
floriferous
- Bearing flowers.
-
flower
- The reproductive structure of a plant.
- foliaceous
- Leaf-like.
-
foliose
- Like a leaf in form or texture.
-
follicle
- A dehiscent fruit with a single ovary, that splits along a single seam on one side of the mature carpel to release the seeds.
-
forb
- Herbaceous plant usually less than 2 meters (6 feet) tall.
- forests
- Area dominated by trees with branches and foliage that meet or interlock to form a continuous canopy although there can be gaps of varying sizes.
-
fork
- A vein that branches.
-
fornix
- A scale or appendage in the corolla tube of some Boraginaceae.
-
free
- Not fused with another dissimilar structure.
-
frond
- The leafy part of a fern, including the stipe (petiole) and blade (pinnae).
-
fruit
- The mature or ripened ovary and any associated structures that ripen and unite with it.
-
funneliform
- Shaped like a flaring tube (funnel).
-
furrow
- Longitudinal groove or channel.
-
fusiform
- Narrowly tapering at both ends and fat in the middle (spindle-shaped).
