Why do ancient poems often say "Gardenia blossoms with one heart"?

Gardenia is concentric, that is to say, it bears concentric seeds.

Liang Xumao's wife Liu Sanniang wrote a poem: "Although two leaves are gifts, friendship lasts forever. Where is the same heart? Gardenia is the most important. " Tang Shi Jianwu's Zaqu: "When you pity, you get water, and when you complain, you stop working." Not as good as gardenia, but United. "The conclusion is the same as Liu Sanniang's poems about Guangzhai Temple.

"Before the trial, the beautiful tree was called Gardenia, and I tried to thank my mother wholeheartedly." A simple and elegant flower can easily remind people of pure and holy love, what's more, this gardenia can "tie a heart".

"Gehua is full of wine, and Gardenia is a good gift." (Send Wang Shaofu to Hangzhou) A handful of fragrant flowers can be given to lovers and, of course, to friends. Beautiful petals write not only the love of vows of eternal love, but also the friendship between neighbors.

Regarding "Gardenia is concentric", there is also a swan song in Song Ci-"Gardenia is concentric with me, and I will quote you a hundred petals." (Zhao Yanduan, a gift to Qingping Yuebiao) Gardenia and Lilac, two famous flowers and beautiful trees, are intertwined with the complex Qian Qian, which makes poets feel sad and makes readers sigh.