Section 2E. Onaepia
	Perennials. Lateral roots slightly fusiform. Stems often branched. Lower leaves ternate or biternate. Flowers solitary and terminal on main stem and branches; petals nearly equal in size to, or smaller than, sepals; disk dentate, almost interrupted, enveloping the base of the carpels until mid-anthesis; carpels 2-5 in number, always glabrous. Diploid with 2n=10.
	Included species (2)
		Paeonia brownii
		Paeonia californica
	Distribution: the section is endemic to western (Pacific) North America: the USA and Mexico.