The rose was originally a kind of gem.

Roses grew in China about 5, years ago. According to historical records, Pingyin, the hometown of roses in China, was cultivated in the Han Dynasty and has a history of more than 2, years. The word "rose" was not a flower name at first, and it was interpreted in Shuo Wen Jie Zi as "rose, the beauty of stone, the rose and the round pearl."

It means that roses are the most beautiful among jade and roses are the most beautiful among jewels. The word "rose" also appeared many times in Sima Xiangru's works in the Western Han Dynasty, for example, in Zi Xu Fu, "The stone is a red jade rose". Therefore, the rose was originally a kind of gem, and its color was purplish red. The time when rose was used as a flower name was the Tang Dynasty, which should be because roses and rose gems are similar in color.

Morphological characteristics of roses

This kind of plants are erect, spreading or climbing shrubs, most of which are prickled, needled or prickled, sparse and spineless, hairy, hairless or glandular. Leaves alternate, odd pinnate compound leaves, sparse simple leaves; Leaflets have serrated edges; Stipules adnate or borne on petioles, sparsely stipules absent.

Flowers are solitary or corymbose, with sparse compound corymbose or panicle; Calyx tube (receptacle) is spherical, altar-shaped to cup-shaped, and the neck is constricted; Sepals 5, sparse 4, spreading, imbricate, sometimes pinnately divided; Petals 5, sparse 4, spreading, imbricate arrangement, white, yellow, pink to red.

the disk surrounds the mouth of calyx tube; Stamens are mostly divided into several rounds and inserted around the disk; Carpels are numerous, few in number, inserted in calyx tube, sessile and extremely rare, free; Style terminal to lateral, overhanging, free or upper part connate; Ovules solitary, pendulous. Achenes are woody, mostly rare, and are inserted in fleshy calyx tube to form rose fruit; Seeds droop. Chromosome cardinal number x=7.