Chemical constituents of Paeonia veitchii Chemical constituents of Paeonia delavayi Studies on chemical constituents in root back of Paeonia suffruticosa A Preliminary Study of the Chemistry and Systematics of Paeoniaceae A subspecies of Paeonia mascula (Paeoniaceae) from W. Asia and SE. Europe A Study on Pollination Biology of Paeonia suffruticosa subsp. spontanea (Paeoniaceae) Paeonia qiui,a Newly Recorded Species of Paeoniaceae from Shaanxi,China Chemical Constituents from Paeonia anomala subsp. veitchii (Paeoniaceae)