### floating plant:

Water lettuce
* Most water lettuce has leaves
  - thick leaves
* does bear flowers, but they are usually hidden down deep under the leaves.
* floating plant.
* free-floating water plant.
* grows faster in full sun
  - tiny daughter plants off to the side
  - very thick leaves
* hydrophytic plant
* is among the world's most productive freshwater aquatic plants
  - one variety that is available at most nurseries that deal in water gardens
* occurs in lakes, rivers and canals, occasionally forming large dense mats.

Flock
* are animal groups
  - congregations
  - software
* can be large where birds buildup over time
  - number in the dozens to thousands of birds
* fly in tight groups when moving locally, but in loose lines when migrating long distances.
* have a hierarchy, which is sometimes demonstrated by aggressive behavior at feeders.
* help ensure that all individuals find at least some food on a regular basis.
* is also the name of the company making the browser
  - short fibers - usually acrylic, polyester, rayon or nylon
  - the function perl uses to execute file locking
* move away from boats when hunted.
* often gather together, forming large groups of hundreds of birds
  - sing in chorus and males sing even in flight
* tend to be smaller when a variety of parid species occur in the same area.

### flock:

Large flock
* can overgraze lawns, littering yards and docks with droppings and molted feathers.
* fly between staging grounds where they can fuel up their bodies with high-energy foods.
* roost together in the trees at the forest edge, or on small river or lake islands.

Small flock
* Most small flocks produce only enough meat for home consumption.
* are rare because flock size big advantage flamingos have over predators.

### flood flows:

Peak flow
* are flood flows.
* is the highest flow of a period.
* measures the muscular effort to exhale forcibly from fully inflated lungs.

### floodplains:

Mangrove swamp
* abound along the coasts.
* are a kind of coastal wetland
  - coastal wetlands
  - essential to the health of the reefs
* are found along the coast and riverbanks
  - in tropical and subtropical tidal areas
  - saltwater swamps which lie along tropical seacoasts
* are, typically, tropical wetlands.
* form the shorelines of almost all the islands.
* is floodplains
  - natural things
* lie along the coast, with wooded hills and a plateau in the interior.
* line the riverbanks from the coast to the center of the country
  - shoreline, where fresh water mixes with salty ocean water
* provide refuge for wading birds and shorebirds
  - valuable habitat for nesting birds, juvenile fish, and many other species

Flora
* can mean plant life of an historic era as in 'fossil flora'.
  * Plants are grouped into floras based on region, period, special environment, or climate. Regions can be geographically distinct habitats like mountain vs. flatland. Floras can mean plant life of an historic era as in 'fossil flora'.
* is an organism

### flora:

Floral fragrance
* are the primary means by which plants attract potential pollinators.
* can dramatically enhance our moods and health.
* improve learning and productivity.

Normal flora
* can protect the host, but in some cases, can also cause disease.
* has a role in protecting the body against potential harmful pathogens.

Resident flora
* live deep in skin layers where they live and multiply harmlessly.
* plays a minor role in disease transmission.