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The Vegetative Community. Components. Grasses- Jointed stems with leaves in two rows. Leaves are parallel veined. Stems are hollow between the joints. Grass-likes- Look like grasses but with solid stems. Stems are often triangular. Sedges and rushes are in this category. - PowerPoint PPT Presentation
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The Vegetative Community
Grasses- Jointed stems with leaves in two rows. Leaves are parallel veined. Stems are hollow between the joints.
Grass-likes- Look like grasses but with solid stems. Stems are often triangular. Sedges and rushes are in this category.
Forbs- Broad-leaved plants with above ground growth that dies back each year. Most forbs have net veins but a few are parallel. Broadleaf weeds and wildflowers are forbs.
Shrubs- Persistent woody stems that remain alive from one year to the next.
Components
GRASS
SHRUB
FORBGRASS-LIKE
Origin Native- Plants of the original vegetation of
North America. Introduced- Plants brought from outside
North America.Growth Cool Season- Majority of growth is during
cool temperatures of the spring and fall months.
Warm Season- Most growth is during late spring and summer.
Life Span
Annual- Only live one season
Biennial- Live two years but only flower during the second growing season.
Perennial- Live multiple years.
Growth Form
Rhizomatous- Spread by underground stems called rhizomes.
Stoloniferous- Spread by aboveground stems called stolons.
Bunch- Spread neither by stolons or rhizomes. They grow in dense clumps.
RHIZOMATOUS
STOLONIFEROUS
BUNCH
Grasses◦ Complex root system that holds soil in place and
preserves soil moisture◦ High source of nutrition for grazing animals
Light grazing benefits grass “Graze half, leave half”
◦ If all of the leaves are consumed, recovery of grasses takes longer
Grasses
Increaser- Varieties of grasses that thrive under heavier grazing. Adaptations that allow them to access resources more
efficiently Often unpalatable and therefore are avoided by
herbivores Decreaser- Varieties of grasses that are easily
damaged with even light grazing. Invader- Plats that move into an area after it
has been badly overgrazed. Occasionally will move into areas that are badly
undergrazed
Grasses