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Providing that the area has remained as woodland, the stand is still considered ancient. Since it may have been cut over many times in the past, ancient woodland does not necessarily contain trees that are particularly old. [1] For many animal and plant species, ancient woodland sites provide the sole habitat.
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]
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]
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 ...
In Britain, it is considered an ancient woodland indicator in southern England, East Anglia, and Carmarthen. [3] [7] However, three-nerved sandwort may also be found in secondary woodland and can recolonize relatively rapidly after habitat disturbance. [8]
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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]