Paeonia Rockii

Paeonia suffruticosa subsp. rockii

Rock's peony or Rock's tree peony (Paeonia rockii, also Paeonia suffruticosa subsp. rockii) is a woody species of peony that was named after Joseph Rock. It is one of several species given the vernacular name tree peony, and is native to the mountains of midwestern China, mainly in Gansu and adjoining provinces. In Chinese, it is known as 牡丹 (pinyin: mǔ dān) or 牡丹皮 (pinyin: mǔ dān pí), and its flower is called 牡丹花 (pinyin: mǔ dān huā). It became the unofficial national flower of China following a nationwide referendum in 1994.