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Herbs herbs (Herb), is a general term for plants, but not a scientific classification of plant cell, and corresponds to the concept of herbaceous plants, the herb is often referred to as while the woody plants known as the

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About classification of annual herbs and herbaceous biennial herbaceous perennial role of herbaceous stems herbaceous plant xylem Introduction "ielwjefljll",Tiffany Jewelry Sale, to the less developed to developed, stems juicy, softer . According to the length of the life cycle of grasses can be divided into general is an annual, biennial or perennial plants. Most herbaceous plants at the end of the growing season, the integral part of the death, including

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annual and biennial herbs, such as rice, radishes and so on. ,cheap tiffany jewelry, Perennial herb of the aerial parts die each year, while the underground part of the roots, rhizomes and other bulbs can live for many years, such as geranium and so on. Herb, annual, biennial and perennial habit, sometimes with the geographic latitude and the variation of changes in cultural habits, such as wheat and barley in the autumn when biennial herb, has become in the spring when the annual grass; Another example is the cotton and castor-oil plant Ma in Jiangsu and Zhejiang is an ,Tiffany Jewellery Outlet, annual herb, while in low latitudes of the South can grow into a perennial herb. Categories annual herb annual grass (annual), is from the seed germination, growth, flowering, fruit to wither death, the life span of only 1 year of herbs, that can be completed within one growing season, life cycle, that is flowering year , ,Tiffany Jewelry On Sale, after the dead seed plants, such as morning glory, Cineraria, hyacinth, aster and so on. Biennial herbaceous biennial herb (biennial), the first year of growing season (autumn) only long vegetative organs, to the second year of the growing season (spring) blossom after the dead plants, such as wheat, sugar beet, broad bean and so on. Perennial herb perennial herb (perennial herb), a longer period of life, usually more than two years of perennial grass

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the plants, such as chrysanthemums, orchids, lotus, water lily, Clivia and so on. Root perennial herb is generally more stout, and some with long roots, tubers, corms, bulbs and other organs, winter, still a quiet part of the ground to sleep, to the second year of climate warming, which then germinate and grow. This growth from year to year, underground roots or stems may ,Tiffany Rings, gradually mast up and perhaps branching. This gives us the basis to identify their age; underground parts from its many branches, stems or roots of the size, length, thickness to guess its age. Perennial ,Tiffany Accessories, herbs can live more than two years. Some of the underground parts of perennial plants such as perennial or rhizomes, bulbs, tubers and other sick organs, and the ground part of the annual deaths, and from the ground until the second part of the spring to grow new branches, flowering and fruiting, such as lotus root, onion, taro, sweet potato, Dahlia, etc.; also some ground and underground parts of plants are perennial, and by the blossom, the shoot is still dead, and to many strong, such as evergreen, wheat Asp and so on. Herbs and herbaceous plants, and woody stems most significant difference is the structure of their stems, stems of herbs as a large number of parenchyma cells in the outermost layer of the stem ,Tiffany Bracelet, is tough mechanical organization. Woody species of vascular herbaceous plants also

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different vascular distribution in the xylem and phloem are located outside of the inside, and this is exactly the opposite of woody plants In addition, do not have the formation of vascular herbaceous layer, can not continue to grow, so the tree will gradually thicken the grass and bamboo, has ,Tiffany Charms, no such ability. Compared with woody stems, herbaceous stem is more evolved features. The role of 1, there are many useful herbs, the food is all important herbs, such as wheat, corn, corn, barley, sorghum, etc., can be used for human consumption. 2, the nature of many animals, as well as pork, beef, sheep, horses and other animals also eat herbs, so herbs are an important part of the food chain. 3, some herbs ,Tiffany Cufflinks, can be seen everywhere in daily life, can be used in the preparation and production equipment, Southeast Asia, there are bamboo-made houses. 4, the nature of animals, many herbs are not only food, but also create a lot of oxygen, prevent soil erosion. 5, many herbs are an important source of medicines. Atlas Atlas entry for more extended reading: 1