The leaf is next to stem axis and the root of one of three basic institutions of higher plants and is known as an organ type Phyllom. Leaf are lateral outgrowths at the nodes (nodes) of stem axis. The original features of leaf are photosynthesis (structure of organic substances by means of light) and transpiration (evaporation of water is important for nutrient uptake and transport) (wholesale Galax leaves).
Lower leaf are also found in rhizomes, underground runners. The scales of onion bulbs are usually low-leaf. The base leaf or leaf base is the lowest part, with the the Journal of stem axis. As axillary refers to angle between the stem axis and it sheet. It is usually only slightly thickened, but sometimes occupies the entire circumference of stem axis. As is known in plants bracts subtending bracts, which carry inir axil a single flower, an inflorescence or part of inflorescence. A bract of a single flower is called wrapper. As bracts is called bracts, which are mostly surrounded several an inflorescence. Your whole shell is called (involucre). The most flowering branch directly to following bract leaf called bracts
In some plant families, such as sweet and sour grasses the leaf base forms a so-called leaf sheath. This is a more or less wide, mostly to be found on the base leaf, like a sheath surrounding the stem axis part. In most cases, this vagina is split, ie, the edges are free to set only one above the other. In contrast, the leaf of Sedge closed sheaths or those in which no free edges are present. But many leaf of vaginal portion is only hinted at or absent.
The most dicots have a more complicated. This also results in almost any shape of blade. In ferns and the ginkgo fork or occurs. Here, the bundles are dichotomous (forked) branches and end blindly at the front end sheet. Occurs in particular in dicot leaf up in a large variety of shapes. The shape and texture of leaf are therefore important particulars to identify the plant species.
The Annexes formed from the epidermis are called hairs (trichomes). Are also subepidermal cell layers involved in formation, one speaks of emergences: examples are spines. As mesophyll is defined as the assimilation tissue. It is usually divided into location of upper epidermis palisade parenchyma and spongy parenchyma located underneath.
For a number of trees such as lime, hornbeam poplar and the stipules are designed as membranous, not green scales, which already fall during the unfolding leaf. In the stipules are transformed to an extension leaf sheath (Ochrea), a membranous sheath that encloses the stem tubular. The ligule (ligule) of sweet and sour grasses that sits at the junction leaf sheath in leaf blade is also a by-sheet.
The bundles are often located on the border between palisade and spongy parenchyma in upper spongy parenchyma. The structure resembles that of bundles in stem axis and is usually collateral. The bundles branch off from the stem axis and go through the leaf stalk without rotation in lamina over. As a result, the xylem to leaf surface, the phloem to lower leaf surface.
The petiole (petiole) is the following on the leaf base, more or less through its narrow stalk shape from the following part leaf sharply defined part leaf. According to anatomical structure, a distinction bifacial and petioles. In most monocots and many conifers, petiole absent. Leaf without stem are called sessile. There is also leaf, which consist only of stem, which is then flat and wide and on which the actual blade surface is entirely lacking. This is a so-called leaf petiole (Phyllodium), z. B. In some acacias. The petiole is usually formed only in leaf.
Lower leaf are also found in rhizomes, underground runners. The scales of onion bulbs are usually low-leaf. The base leaf or leaf base is the lowest part, with the the Journal of stem axis. As axillary refers to angle between the stem axis and it sheet. It is usually only slightly thickened, but sometimes occupies the entire circumference of stem axis. As is known in plants bracts subtending bracts, which carry inir axil a single flower, an inflorescence or part of inflorescence. A bract of a single flower is called wrapper. As bracts is called bracts, which are mostly surrounded several an inflorescence. Your whole shell is called (involucre). The most flowering branch directly to following bract leaf called bracts
In some plant families, such as sweet and sour grasses the leaf base forms a so-called leaf sheath. This is a more or less wide, mostly to be found on the base leaf, like a sheath surrounding the stem axis part. In most cases, this vagina is split, ie, the edges are free to set only one above the other. In contrast, the leaf of Sedge closed sheaths or those in which no free edges are present. But many leaf of vaginal portion is only hinted at or absent.
The most dicots have a more complicated. This also results in almost any shape of blade. In ferns and the ginkgo fork or occurs. Here, the bundles are dichotomous (forked) branches and end blindly at the front end sheet. Occurs in particular in dicot leaf up in a large variety of shapes. The shape and texture of leaf are therefore important particulars to identify the plant species.
The Annexes formed from the epidermis are called hairs (trichomes). Are also subepidermal cell layers involved in formation, one speaks of emergences: examples are spines. As mesophyll is defined as the assimilation tissue. It is usually divided into location of upper epidermis palisade parenchyma and spongy parenchyma located underneath.
For a number of trees such as lime, hornbeam poplar and the stipules are designed as membranous, not green scales, which already fall during the unfolding leaf. In the stipules are transformed to an extension leaf sheath (Ochrea), a membranous sheath that encloses the stem tubular. The ligule (ligule) of sweet and sour grasses that sits at the junction leaf sheath in leaf blade is also a by-sheet.
The bundles are often located on the border between palisade and spongy parenchyma in upper spongy parenchyma. The structure resembles that of bundles in stem axis and is usually collateral. The bundles branch off from the stem axis and go through the leaf stalk without rotation in lamina over. As a result, the xylem to leaf surface, the phloem to lower leaf surface.
The petiole (petiole) is the following on the leaf base, more or less through its narrow stalk shape from the following part leaf sharply defined part leaf. According to anatomical structure, a distinction bifacial and petioles. In most monocots and many conifers, petiole absent. Leaf without stem are called sessile. There is also leaf, which consist only of stem, which is then flat and wide and on which the actual blade surface is entirely lacking. This is a so-called leaf petiole (Phyllodium), z. B. In some acacias. The petiole is usually formed only in leaf.
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