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Species which are particularly characteristic of ancient woodland sites are called ancient woodland indicator species, such as bluebells, ramsons, wood anemone, yellow archangel and primrose for example, representing a type of ecological indicator. [8] Anemonoides nemorosa, the wood anemone
Very rare species are not considered axiophytes; for a species to be a useful indicator of quality habitat it must be relatively frequent in those habitats, but scarce elsewhere. A typical example would be dog's mercury (Mercurialis perennis), a plant slow to colonise new sites, but common in ancient woodland and old hedgerows.
The plant is an ancient woodland indicator, as the ants rarely carry the seeds more than a few yards, seldom crossing a field to go to a new woodland. The Latin specific epithet pratense means "of meadows". [2] Melampyrum pratense is a food plant of the caterpillars of the heath fritillary (Melitaea athalia), a butterfly. [3]
In Britain Tilia cordata, traditionally called pry, is considered an indicator of ancient woodland, and is becoming increasingly rare. [9] Owing to its rarity, a number of woods have been given SSSI status. Cocklode Wood, part of the Bardney Limewoods in Lincolnshire, is the best surviving spread of medieval small leaved limes in England. [10]
Allium ursinum, known as wild garlic, ramsons, cowleekes, cows's leek, cowleek, buckrams, broad-leaved garlic, wood garlic, bear leek, Eurasian wild garlic or bear's garlic, is a bulbous perennial flowering plant in the amaryllis family, Amaryllidaceae. It is native to Eurasia, where it grows in moist woodland. [2]
Examples of plant formation include forests, woodlands, and grasslands. Because it may not be possible to determine whether a particular plant was an oak, eucalyptus, or other species, plant formations in paleosols make it possible to identify an ancient woodland ecosystem from an ancient grassland ecosystem. [2]
There is also an extraordinary range of geophytes, the plants that have bulbs or bulbous growths that make them especially adapted to woodland. These include the ancient woodland indicators of lily-of-the-valley, herb paris and ramsons, but also the uncommon in angular Solomon'-seal (Polygonatum odoratum) as well as the common in bluebells ...
[4] [5] [6] It is a predominantly lowland species that inhabits moist, base-rich, shady habitats including; broad-leaf woodlands, hedgerows, limestone pavements, pastures, and riverbanks. [7] It has been used as an indicator of ancient woodland in East Anglia. [8]