Forb

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forb

[fȯrb]
(botany)
A weed or broadleaf herb.

Forb

 

any one of a group of plants that includes all herbaceous species except true grasses, legumes, and sedges. Forbs are abundant in many types of meadows, especially mountain ones, and in meadow steppes. They predominate during the early stages in the development of meadows, for example, meadowsweet on forest clearings and Altherbosa in the Caucasus. Forbs also predominate in meadows that have undergone extreme overpasturing (lady’s-mantle and other alpine meadows), in places oversaturated with organic fertilizers (thickets of alpine dock on cattle resting places of the Caucasus and Carpathians), and in wet meadows where the true grasses have died off (mainly creeping crowfoot).

Forbs vary in ecological and biological properties and in economic value. Noxious forbs include onions, and poisonous forbs include Hellebore and Ranunculus. Some species are inedible or rarely eaten as forage. Some types of forbs are of relatively high feed value and are readily eaten by livestock (some wormwoods, saltworts, dandelion, cumin, ribwort). Others have significance as vermifuges. In various types of meadows forbs make up 10 to 60 percent (sometimes even more) of the herbage. Many forbs grow in dry-valley, lowland, and wet meadows of the nonchernozem zone, as well as in meadows in the steppe zone with intervalley chernozems. Many different kinds of forbs are found on mountain meadows.

Forbs are used principally as pasturage. In hay form, the leaves and tender snoots dry out and are crushed and lost. Cultivated pastures do not include forbs.

References in periodicals archive ?
The second is to remove all vegetation and reseed with the desired warm-season grasses and/or forbs.
We explored relationships between cover by forbs and structure of vegetation using Pearson correlations and stepwise multiple regression (Zar, 1996).
The researchers believe the forbs disappeared due to changes in the plant-water balance in the zone.
4] grasses, legumes, and PD forbs are the functional groups with the greatest proportion of their cover (>50%) in LAI Class 1 plots (Fig.
We submitted a composite sample of pellet groups for each season to the Wildlife Habitat Nutrition Laboratory (Natural Resource Sciences, Washington State University, Pullman) for microhistological analysis to determine composition of diet and seasonal differences in consumption of species of plants and classes of forage (grasses, forbs, and browse).
For grasses and forbs the 2nd harvesting interval showed the maximum production.
Our second objective was to test the hypothesis perennial forbs show high phenotypic plasticity in biomass allocation patterns in response to bison-induced alterations in habitat and increased resource availability.
They identified each forage class (such as shrubs, forbs, grasses, sedge-rushes, and conifers) and all plants >5% of the diet to at least the genus level using epidermal-cell-tissue fragments.
Data Analyses--For bison fecal pat and plant height (height of the tallest grasses and tallest forbs within plots) variables, we used t-tests to assess differences in response to burn age.
As observed with the annual grasses, annual forbs are well adapted to establish following disturbances and can quickly dominate an area.
The delegation members included representatives from Anthem PPE, Well Care Oil Tools, Vishal Steel, Calter Group and Forbs Marshall.
A genetic analysis of ancient permafrost suggests that after the Ice Age the Arctic shifted from a landscape dominated by nutritious flowering plants known as forbs to one dominated by hard-to-digest grasses and woody plants.