What does sunflower branch mean?

The meaning of several branches of sunflower:

1 means you are the only one for me, 2 means your two-person world, 3 means I love you, 4 means vows and promises, 5 means no regrets, 6 means success, 7 means happy meeting, 8 means reconciliation, 9 means firm love and eternity, 10 means perfection and perfection.

Sunflower belongs to the genus Helianthus in Compositae.

Tall panicum miliaceum. Stems erect, 1 to 3 meters high, stout, with white coarse bristles, unbranched or sometimes branched at the top. Leaves alternate, heart-shaped, ovoid or ovoid, with acute or acuminate top, three main veins, rough serrated edges, short and thick hairs on both sides and long stalks. The flower head is very large, with a diameter of about 10 to 30 cm, which is solitary at the end of the stem or branch and often inclines downward. The involucral bracts are multi-layered, leaflike, imbricate, ovate to ovate-lanceolate, tapering at the top and covered with bristles or cilia. Receptacle flat or slightly convex, with semi-membranous stipules. Tongue-shaped flowers are mostly yellow, with flat tongues, oblong, oval or oblong, and are not strong. Tubular flowers are numerous, brown or purple, with lanceolate lobes and fruits. Achenes are obovate or ovoid, slightly flat, long 10 to 15 mm, angular, often white pubescent, with two membranous crown hairs at the top. The flowering period is from July to September, and the fruiting period is from August to September.

The height of the most common sunflower is 2.5 to 3.5 meters, and the highest can reach 9. 17 meters.

The root of sunflower consists of taproot, lateral root and fibrous root. The taproot is deeply buried and generally grows in the soil at a depth of about 0.3 to 1.2 meters, while the US Department of Agriculture has measured that there were sunflower roots as long as 1.5 meters. Lateral roots grow from the main roots and grow laterally; There are many fibrous roots on the lateral roots. Lateral roots and fibrous roots are covered with root hairs. The taproot grows vertically downward and connects to smaller lateral roots and fibrous roots, which helps the structure to support the weight of sunflower. The taproot is the taproot of sunflower, which receives most of the nutrients and water obtained by plants. Sunflower has developed roots, which are widely and deeply distributed in soil, and about 60% of them are distributed in 0-40 cm soil layer. Sunflower roots have been growing faster than stems. Roots grow fastest before and after disc formation. When the seeds begin to mature, the roots stop growing and then wither gradually. In addition, a large number of water roots (like the aerial roots of corn) can grow under suitable conditions.

Unlike some other flower stems, the flower stems of sunflowers can't stretch out to support other flowers, but the flower stems support a flower. The stem can grow to 3 to 5 meters. Sunflower has a dicotyledonous stem structure. The stems are round and erect, with rough surface and bristles. Stem is composed of cortex, xylem and sponge pulp, which provides nutrients and water for plants at all stages of their growth and life cycle. The outer layer is called epidermis, which protects the stem. In the late growth stage, the stem lignified, and the pulp in the stem formed multi-layer hollow. The embryo stem of sunflower is green, lavender and deep purple, which is an important symbol for identifying varieties at seedling stage. The stem height varies greatly among different varieties, and the plant height of the same variety is also greatly influenced by sowing date and cultivation conditions. From budding to flowering, the growth rate of stems is the fastest, at which time the growth height accounts for about 55% of the total height, and then the growth rate slows down, accounting for only about 5%. The branching of sunflower is determined by heredity, which is caused by environmental conditions.

Sunflower leaves are dicotyledonous plants, divided into cotyledons and true leaves. A pair of cotyledons. True leaves are often opposite to each other at nodes 1 ~ 3 at the lower part of the stem, and alternate at the upper part. True leaves are relatively large, with short and hard bristles on the leaves and petioles, which are covered with a layer of wax. The number of leaves varies with varieties, with 25-32 leaves for early-maturing varieties and 33-40 leaves for late-maturing varieties. The leaves at the lower part of the stem make nutrients before flowering, which are mainly used for root growth, and the function basically ends when flowering. Nutrients made by middle and upper leaves are mainly supplied to the disk to promote seed formation.

Sunflower is a kind of flower head, which grows at the top of stem, commonly known as disk. Its shapes are convex, flat and concave. There are two kinds of flowers on the disk, namely tongue-shaped flowers and tubular flowers. Tongue-shaped flowers 1 to 3 layers, inserted on the periphery of the disk, asexual reproduction. Pollination occurs in the flower part of sunflower located at the outer edge of disc-shaped floret, and moves more toward the center. It takes as long as 30 days for sunflower pollination to reach maturity. The color and size of flowers vary with varieties, such as orange, light yellow and purplish red, which can attract insects to collect honey for pollination. Tubular flowers, located in the tongue-shaped flowers, are bisexual flowers. The colors of corolla are yellow, brown, deep purple and so on.

Fruit is achene, which is used to be called seeds and melon seeds, commonly known as sunflower seeds and can be eaten. Fruit includes pericarp, seed coat and embryo. The inside of sunflower seeds is called nucleolus. These kernels contain dried fruits called achenes, which can be eaten by human beings. These achenes are formed below the flowering part of the plant, in the lower ovary of the discoid floret. In addition to human consumption, sunflower seeds can also be used as animal feed and oil. Scientists are now using sunflower seeds to produce biodiesel, which is an excellent choice for environmentally safe fuel. Edible seeds are long, with black and white stripes and thick skins, accounting for more than 40% of the seed weight, and the 1000-grain weight is100 ~ 200g. Oilseed is short, mostly with black skin and thin skin, accounting for about 20-30% of the seed weight, and the 1000-grain weight is 40- 1 10g. Sunflower seeds contain 38-42% oil, a lot of vitamin E and 38% protein.