The so-called weeds refer to plants that grow in places that are harmful to human survival and activity, and such plants are not cultivated by people, and all belong to wild plants.
On Earth, there are more than 300,000 species of plants, and more than 8,000 species of plants are identified as weeds. There are more than 36,000 kinds of plants growing in China, and there are more than 1,200 kinds of plants in 119 families that are identified as weeds. To help you recognize weeds, we're posting a set of common weed photos for you to learn to identify.
1. Barnyard grass
Barnyard grass is an annual herb that is also known as barnyard because of its very similar appearance to that of rice seeds. This weed is a vicious weed in rice paddies and prefers to grow in rice paddies, swamps, ditches or low-lying wastelands.
Second, dogtail grass
Dogtail grass is an annual herb. The stems are erect, generally 10–100 cm tall and up to 3–7 mm in diameter at the base. It has a tightly conical inflorescence that grows cylindrically at the top of the plant, upright or slightly curved, with long soft hairs on the spindle, and the spikes look like spikes of millet.
3. Cow tendon grass
It is an extremely harmful field weed with an extremely developed root system, overgrown stems, a sloping base, and a strong ability to absorb soil moisture and nutrients.
4. Grass
The grass, known to us here as "zi la grass", is an annual herb. The stem is thin, glabrous, the base is inclined, the height of the plant is 30-60 cm, the stem has many nodes, often branches, and the base nodes are easy to take root.
5. Ma Tang
Matang is an annual herbaceous plant of the family Matangaceae. The plant can reach a height of up to 80 cm and has no glabrous or knotweed hairs on the stems. The leaf sheath is shorter than the internodes, and the leaves are linear lanceolate, rounded at the base, with thicker edges and slightly rougher edges.
Sixth, look at Mai Niang
Look at the wheat lady as a grass family, look at the wheat lady is an annual herb. The stems are sparsely clustered and appear slender and smooth, with leaf sheaths shorter than internodes; the leaf tongue is membranous, the leaves are flattened, and the conical inflorescences are cylindrical and gray-green.
Seventh, the pigs are afflicted
It is a herbaceous plant of the rubiaceae family, lalar vine genus, vines or climbing edges. It is usually 30–90 cm tall; the stem has 4 angular edges, and there are small upside-down spiny hairs on the edges, leaf margins, and veins.
8. Corn grass
Corngrass is a butterfly-shaped annual, ground-paved herb, often branched, with three pinnate compound leaves, membranous, large and perturbed, usually longer than the petiole.
Nine, duck plantage
Duck plant is an annual herb. The stems are creeping and rooted, mostly branched, up to 1 meter long, with no hairs on the lower part and short hairs on the upper part. The leaves are lanceolate to ovate lanceolate, 3–9 cm long and 1.5–2 cm wide.
10. Victory over red thistle
There are about 30 species of red thistle, all of which are annual herbaceous plants, 50-100 cm tall, and have no obvious taproots. The stem is stout , about 4 mm in diameter at the base , and is unbranched or branched from the base or above the middle , or lying flat at the lower base with nodes often bearing indefinite roots.
11. Little Flying Puff
It is a whole grass or fresh leaf of the Asteraceae plant Small White Wine Grass, which is an over-aged or annual herb. Its stem is erect, the plant is 50-100 cm tall, with coarse hairs and pinstripes. The leaves are alternate, with petioles short or inconspicuous. The leaves are narrow, lanceolate, and slightly serrated throughout the edge.
XII. Curly ears
Curly ear is a perennial, sparsely tuned herb of the family Caryophyllaceae, cymbidium, with a height of 10–35 cm. The stem is creeping at the base, the upper part is upright, green and with a lilac red, the leaves are linear lanceolate or oblong lanceolate, the apex is sharply pointed, the base is wedge-shaped, sparsely hairy, and the leaf axils have sterile short branches.
13. Return of the bar plate
Barbans are classified as an annual herb of the family Tateshina and the genus Tateshina. The stem is climbing, mostly branched, 1-2 meters long, and the stem has longitudinal edges and sparse inverted skin spines along the edges. The leaves are triangular in shape, 3–7 cm long and 2–5 cm wide.
Fourteen, through the spring grass
Tongquan grass is an annual herb of the genus Tongquan grass. The plant is 3–30 cm tall, glabrous or sparsely hairy on the stem, and the inflorescence grows at the top of the stem and branches, often flowering near the base.
Fifteen, jing three edges
It is a perennial plant of the family Sedgeaceae, the genus Asteraceae. The height of the plant is 0.7 to 1.2 m, the rhizome is transverse, usually single, occasionally branched, often expanded, with a tuber at the end, 2 to 4 cm long, 1.5 to 3 cm in diameter, black and brown, pointed at both ends, lightly foamed in texture.
The above are pictures of the 15 species of weeds that we commonly see. Do you know each other?