The world of plants has almost 300,000 species of angiosperms. Vast majority of its representatives dicots. Most of them are annuals and herbaceous perennials, although there are also trees and shrubs. Almost all species of deciduous trees in the world are dicotyledons. They have a list of irregular użyłkowaniu reticular lamina (monocots have parallel meshing). Other features:
– Conducting bundles arranged in a ring are “open”, ie allow for the thickness of the secondary growth (deposition wood and phloem toward the center to the periphery).
– Consist of 4 or 5 membered verticillatum forming cup and crown.
– Family dicotyledons: Ranunculaceae, Rosaceae, legumes, cross, complex, Nymphaeaceae.
The most famous dicotyledonous
– Family jaskrowatych has approx. 1, 5 thousand. species of herbaceous plants and shrubs. Many of them grow in gardens and meadows (marigolds, hepatica, anemones, clematis and Miłki).
– Nymphaeaceae (water lilies) – species of tropical plants growing in temperate zones, found in nature and botanical gardens.
– Primulaceae – 1000 species. The most famous: primroses (primroses), cyclamens, loosestrife.
– Cross – 3200 grade. The most famous is cabbage.
– Nightshade – 2000 grade. The most famous potato.
– Complex (Asteraceae) – having flowers with irregular structure, with a population approx. 20,000 grade.
The plants used by man.
– For mankind are essential monocots, belonging to the grasses (eg. Rice, wheat, rye, sugar cane)
However, the role of dicots is also significant (potato, carrot, cabbage, beets, onions, asparagus, loins and many other vegetables, as well as shrubs and fruit trees)
– Some dicotyledons are fodder for livestock, or a source of substances used in medicine,
– The row strączkowców plants are so well known as beans, peas, soy and clover, and acacia, (from which it gets the juice gum arabic), and Indigofera tinctoria (prod. Dye) and groundnut.
– Of cabbages were grown in many different forms. Varieties are, for example. Brussels sprouts, Italian and headed, headless cabbage, kohlrabi, cauliflower, kale and broccoli, rape, turnip.
– The family of lamellar used plants with a strong pungent odor and flavor (coriander, parsley, cumin, celery).
– Potato (nightshade family) – a plant which in many countries is a key component of the diet. Approx. 2000 years ago began to be cultivated in South America. Brought to Europe by Columbus. The leaves of potato (like other Solanaceae) are poisonous.
– Family complex thyme and marjoram.
– To protect against herbivores, many plants produce poisonous substances. Man uses their toxins to produce drugs and other agents used in everyday life.
– Family complex medicinal herbs: mint, lemon balm.
– With Iris rhizomes produced essential oils used in cosmetics and confectionery industries.
– Family complex – sunflower, dandelion, daisy, asters, marigolds, chrysanthemums, gerberas, lavender, thyme, rosemary.
– Cacti, plants resistant to prolonged drought (to protect your eyes from radiation). The most popular are coming from South America. – Prickly.
– Iris (iris), peonies (peonies), lilies of the valley May (located under protection), lupins.