What is a flower?

Flowers have both broad and narrow meanings: narrow flowers refer to herbaceous plants with ornamental value, such as impatiens, chrysanthemums, bunches of red, cockscombs, etc.; in general, flowers include herbaceous plants of ornamental value, including herbs. Or woody ground cover plants, flowering shrubs, flowering trees and bonsai, such as Ophiopogon japonica, Sedum, clumping phlox and other ground cover plants, plum, peach, rose, camellia and other trees and flower shrubs. In addition, the tall trees and shrubs distributed in the southern region moved to the cold regions of the north, and can only be used for greenhouse potted ornamentals, such as white orchids, Indian rubber trees, and palm plants, which are also included in the generalized flowers.

The flower word is made in the oracle bones of Shang Dynasty (ie, Hua), which shows the flower shape and the lush foliage. Hui, Han Shen Xu Shen "Saying Wen Jie Zi" said: "Hui, the total name of the grass is also." Flower, Hui two words combined, it appears later. In the Northern and Southern Dynasties, "Liang Shu He Dian Chuan" contains: "There are loyalists in the garden, and plants are planted on the side of the plaque." This is an earlier description of the combination of Hua and Hui. However, in the ancient Chinese literature since then, the use of two characters is less. In Japan, under the influence of ancient Chinese horticultural writings, the word “flowers” ​​appeared in Beyin Yixuan’s “Flowers” ​​published in 1698, and it was gradually used as a special gardening term after the mid-18th century. In the 1920s, the word flower was returned from Japan to China and it has been used until now.

Flowers are the reproductive organs of angiosperms that progeny. A typical flower, on a short axis of limited growth, is planted with calyx, corolla and stamens and pistils that produce germ cells. Some scholars believe that the spore leaf of gymnosperm is also a "flower", while most people think that angiosperms have flowers, so angiosperms are also called flowering plants. The various parts of the flower are not easily affected by the external environment, and the changes are small. Therefore, for a long time, people have used the morphological structure of flowers as the main basis for the classification and identification and systematic evolution of angiosperms.

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