Which leaves have veins that are planar

The veins of the leaves of the following plants are parallel:

1.Monocots: including grasses (wheat, corn, rice, barnyard grass, millet, etc.), orchids (spring orchid, Jianlan, Molan), palmaceae, liliaceae, sedges, and gymnosperms in the pine and cypress.

2.Plantains, bananas: The leaf veins of these two plants are lateral (parallel) veins, which are perpendicular to the midrib and run parallel to the leaf margin.

3.Palm: The leaf veins are projectile (parallel) veins, and each leaf vein radiates from the base.

4.Plantain, purple calyx: The veins of these two plants emanate from the base, gradually increasing at a distance from each other in the middle of the leaf, in an arc-like distribution, and finally converge at the tip of the leaf.

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Monocots are all parallel leaf veins, such as grasses (wheat, corn, rice, barnyard grass, millet, etc.), orchids (Chunlan, Jianlan, Molan), palmaceae, liliaceae, sedges, and pines and cypresses in gymnosperms.

Corn, wheat, rice, sorghum, sugarcane, mushrooms, bamboo, tulips, hyacinths.

Daylily, hosta, lily of the valley, spider plant, bamboo, Aracea, Banxia, calamus, millennium, Alocasia, Asparagus, Mai Dong, Grass along the steps, Fritillary, National Orchid (Chunlan, Four Seasons Orchid, Qiulan, Molan), Jialan, Tiger's Eye Evergreen, Tiger Tail Orchid, Seven Leaves and One Branch, Spider Egg, Yellow Essence.

Centifolia, Gentleman's Orchid, Tennis Flower, Vermilion Orchid, Lycoris.

Narcissus, tuberose, jade curtain, wind and rain flowers, golden onion lotus, monstera, calla lily, flower-leaf taro, white palm, anthurium, evergreen.

Leaf veins are divided into three main categories:

1. Forked veins.

After the leaf veins are born from the leaf base, they are all bifurcated branches, called forked veins. This vein order is a more primitive type and is rarely seen in seed plants, such as ginkgo, but is more common in ferns.

2. Reticular veins.

It has obvious main veins, and through the gradual branching, it forms most of the staggered distribution of fine veins, which are connected to each other to form a network, which is called reticular veins. Among them, there is a distinct main vein, and the lateral veins emanate from both sides of the autonomous veins, arranged in a feathery manner, and reach the leaf margins several times, called pinnate reticulated veins.

3. Parallel veins.

It is mainly the vein sequence peculiar to monocots. The midrib and lateral veins and thin veins of the leaf are arranged in parallel, or the lateral veins are nearly perpendicular to the midvein, and the lateral veins are nearly parallel to each other, all belong to parallel veins.

Morphological characteristics of leaf veins

According to the order and thickness of the leaf veins, they can be divided into three types: main veins, lateral veins and fine veins. The main vein is thicker and most obvious; If one of the main veins is located in the leaf**, it is called the "midrib" or "midrib". The lateral veins are branches of the main veins and are generally thinner.

The veins are branches of the lateral veins, which are thinner than the lateral veins, distributed throughout the leaf, and are often intricately intertwined.

Within the epidermis of the veins is the mechanical tissue of the veins (thick-horned tissue) to support the elongation of the leaf; Inside are the basic tissues and lobes vascular bundles. Vascular bundles are mainly composed of phloem, cambium, and xylem and are arranged in a ring. The phloem is either lower or outer and the xylem is upper or inner.

Monocots and dicots basically have leaf veins, the leaf veins of monocots are mostly parallel veins, and the leaf veins of dicots are mostly reticular veins. Plants with parallel veins include plantains, sedges, plantains, and calyxes, plants with reticulated veins include poplars, camphor trees, peach trees, and loquats, and ginkgo biloba leaf veins are forked veins.

The veins of the plant are thick and thin, spread over the entire leaf surface, and provide nutrients and water to the leaves. The leaf veins are also divided into species, such as poplar and camphor trees, and the leaf veins of the plant are more obvious, constantly extending, and interlocutory, which is the more common reticular vein. Plants such as peach trees and loquat have distinct main veins, and the lateral veins extend from the main vein to both sides, which are pinnate veins.

There are also parallel veins in the leaf veins of plants, and parallel veins are divided into two types: transverse parallel veins and arc-shaped parallel veins. In plants such as plantain and sedge, the main and lateral veins of the leaves are parallel, or the lateral veins are parallel to each other, which is called transverse parallel veins. In plants such as plantain and purple calyx, the leaf veins of the plants are not straight enough, and most of them are arc-shaped, which are called arc-shaped parallel veins.

In addition to reticular veins and parallel veins, there are also forked veins in the leaf veins of the plant. The veins of plants generally extend from the base of the leaf to the tip of the leaf, and there will be bifurcated veins on the leaves, and there is no obvious distinction between the main veins and the lateral veins, such as the ginkgo biloba leaf with a smooth leaf surface, and the leaf veins of most ferns are in a crossed state.

The veins of the leaves of the plant are extremely important to the leaves, as they carry water and nutrients to the leaves, ensuring healthy growth and making the leaves greener. The healthy growth of leaves can carry out photosynthesis and transpiration, which is conducive to the accumulation of nutrients and water absorption of plants, and is also conducive to the growth of flowers and leaves, which can make the plants grow more robust.

Reticulated veins and parallel veins are the two main types of veins of 1190 leaves, and they have distinct differences in structure and distribution:

1.Structure: reticulated veins (also known as reticulate veins):

Reticular vein refers to the formation of a complex reticular structure in the leaf, which is composed of the main vein, the secondary vein, and the reticulated vein. The main veins usually start at the base of the leaf and then branch into multiple secondary veins, which form a cross-knit and fierce texture between them.

Parallel veins (also known as parallel veins): Parallel veins are veins that form a distinct parallel arrangement in a leaf. Parallel veins usually extend from one or more main veins to the tip of the leaf and do not branch along the way. There is no significant crossover between these main veins.

2.Distribution: Reticulated veins: Reticular veins are mostly found on the leaves of angiosperms 1190, especially dicotyledons.

Parallel veins: Parallel veins are mostly found on the leaves of gymnosperms 1190, especially monocotyledons 1190, and 1190 grasses and bamboos.

It is important to note that not all 1190s have only one. <>

Explanation of leaf vein [leaf vein; leaf venation]

Botanical noun. Vascular bundles distributed within the mesophyll.

Word decomposition Explanation of leaf leaf leaf (leaf) è vegetative organ of the plant before digging one : leaves. Leaves.

The leaves are pure and pure. The leaves fall back to the roots. A leaf knows autumn.

A leaf blinds the eyes (a metaphor for short-sightedness, often blinded by small things in front of you, and cannot see the distance and the big place.) Also known as "a leaf obscure"). Like a leaf:

Iron Leaf. Shutters. Same as "page".

Explanation of the world pulse à the blood vessels that are distributed around people and animals: the veins. Pulse.

Arterial beating: pulse. Pulse cutting (TCM finger pulse).

Pulse mouth (the part of the Chinese medicine that cuts the pulse). Pulse. Pulse (refers to the image and movement of the pulse).

The glota (the beating part of the radial artery that can be seen at the wrist). Pulse diagnosis. Like blood.

Answer C Monocots and dicots both belong to the angiosperms in the seed plants, both can flower and bear fruit to produce seeds, the seeds of monocots have one **leaf, the leaf veins are mostly parallel veins, fibrous root system, the seeds of dicots have two ** leaves, the leaf veins are mostly reticular veins, straight root system.