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brussels_plants [2008-10-14 13:54] – lina | brussels_plants [2008-10-14 13:57] – lina | ||
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and widely naturalised elsewhere, including North America, where it is an invasive problem weed. It occurs in a very wide range of habitats, | and widely naturalised elsewhere, including North America, where it is an invasive problem weed. It occurs in a very wide range of habitats, | ||
from woodlands to scrubland, hedges and marshes. | from woodlands to scrubland, hedges and marshes. | ||
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In the days of belief in witchcraft, shepherds used to hang it as a charm round the necks of those of their beasts whom they suspected | In the days of belief in witchcraft, shepherds used to hang it as a charm round the necks of those of their beasts whom they suspected | ||
to be under the evil eye.The older physicians valued Bittersweet highly and applied it to many purposes in medicine and surgery, for which it is no longer used. It was in great repute as far back as the time of Theophrastus, | to be under the evil eye.The older physicians valued Bittersweet highly and applied it to many purposes in medicine and surgery, for which it is no longer used. It was in great repute as far back as the time of Theophrastus, | ||
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* Marchantiophyta/ | * Marchantiophyta/ | ||
--Description-- | --Description-- | ||
- | Most liverworts are small, usually from 2–20 millimetres (0.08–0.8 in) wide with individual plants less than 10 centimetres (4 in) long,[5] so they are often overlooked. The most familiar liverworts consist of a prostrate, flattened, ribbon-like or branching structure called a thallus (plant body); these liverworts are termed thallose liverworts. However, most liverworts produce flattened stems with overlapping scales or leaves in three or more ranks, the middle rank being conspicuously different from the outer ranks; these are called leafy liverworts or scale liverworts.[6][7] | + | Most liverworts are small, usually from 2–20 millimetres (0.08–0.8 in) wide with individual plants less than 10 centimetres (4 in) long, so they are often overlooked. The most familiar liverworts consist of a prostrate, flattened, ribbon-like or branching structure called a thallus (plant body); these liverworts are termed thallose liverworts. However, most liverworts produce flattened stems with overlapping scales or leaves in three or more ranks, the middle rank being conspicuously different from the outer ranks; these are called leafy liverworts or scale liverworts. |
- | Liverworts can most reliably be distinguished from the apparently similar mosses by their single-celled rhizoids.[8] Other differences are not universal for all mosses and all liverworts; | + | Liverworts have a gametophyte-dominant life cycle, with the sporophyte dependent on the gametophyte. Cells in a typical liverwort plant each contain only a single set of genetic information, |
- | + | Another unusual feature of the liverwort life cycle is that sporophytes (i.e. the diploid body) are very short-lived, | |
- | Liverworts have a gametophyte-dominant life cycle, with the sporophyte dependent on the gametophyte.[11] Cells in a typical liverwort plant each contain only a single set of genetic information, | + | |
--Ecology-- | --Ecology-- | ||
- | Today, liverworts can be found in many ecosystems across the planet except the sea and excessively dry environments, | + | Today, liverworts can be found in many ecosystems across the planet except the sea and excessively dry environments, |
-Information source: | -Information source: | ||
http:// | http:// | ||