Excuse me, is there a better website to find? Picture material of flowers. It can also be a picture about Chinese painting.

Go to Baidu pictures and search for "Chinese painting * *", such as: Chinese painting peony, Chinese painting chrysanthemum and Chinese painting rose. Or search some famous flower-and-bird paintings, which can be small freehand brushwork of flowers and birds. Wang Xuetao, Xiao Lang and Sun Qifeng are painters with high achievements. Try searching them (name+flower name). Or (small freehand brushwork+flower name), search and try, I hope I can help you.