This page has common plant terminology and definitions-

Alternate leaf arrangement- leaves are not directly on opposite sides of the stem, instead they are staggered slightly

Annual-
a plant that completes its life cycle within one calendar year, dies after one year

Anther- The top of the stamen, which produces the pollen.

Biennial- a plant that completes its life cycle over 2 years, the first year is spent growing leaves, stems and roots.  The second year is when the plant "bolts" upwards producing flowers and going to seed, after which the plant dies
 
Bract- A modified leaf attached to the base or stalk of a flower

Bud- An undeveloped leaf or flower of a plant

Bulb- A specialized underground bud that sends down roots and stores water and nutrients

Cellulose- the substance in plant cells that makes plants rigid and aids in keeping plants from collapsing

Cotyledon- The first leaves of a seed plant.  These are also called the "seed leaves"

Emersed plants- a plant that is rooted in shallow water.  Most of the vegetative growth is above water.

Native plant- A plant that is historically found in its current area.  These plants are generally good for an area, as they give competition to non-native plants.

Non-native plant- any plant that is not historically found in its current area.  These plants are usually introduced into new areas by human activity or livestock

Noxious Weed- a plant that has been designated as being harmful to crop production, habitat, livestock and/or humans

Opposite leaf arrangement- leaves are directly on opposite sides of the stem

Perennial- a plant that grows for 3 or more years, usually flowering each year

Rays- narrow flowers that appear as a single petal on members of the Asteraceae (Sunflower) family.  An example is dandelion

Rhizome- a root-like stem that grows horizontally underground and produces new leaves and shoots

Roots- The underground parts of a plant that uptake nutrients and water

Rosette- The beginning formation of a plant after the seedling stage.  It is a grouping of basal leaves

Runner-
A creeping stem that sends down new roots at spaced intervals called nodes.  These nodes can form new plants and detach from the parent plant.

Stem-
The main axis of a plant, the central stalk

Stolon-
a modified stem growing along the ground that develops new plants, an example is strawberry plants.

Submersed plant-
plants that develop completely under the surface of water, leaves and flowers may eventually grow above the water surface

Terrestrial plants- plants that grow on land, not in water

Weed-
any plant that crowds out cultivated or desired plants









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Website Created by Martin Blevins of the Grant County Noxious Weed Control Board