矮牡丹Paeonia suffruticosa Andr. var. spontanea Rehd.
矮牡丹Paeonia suffruticosa Andr. var. spontanea Rehd.
1b. 矮牡丹（变种） 图版2: 1-2
Paeonia suffruticosa Andr. var. spontanea Rehd. in Journ. Arn. Arb. 1: 193. 1920; Stern, Stud. Gen. Paeonia 43. 1946; 方文培, 植物分类学报 7(4): 302. 1958; 中国高等植物图鉴 1: 651, 图1302. 1972.
与牡丹的区别：叶背面和叶轴均生短柔毛，顶生小叶宽卵圆形或近圆形，长4-6厘米，宽3.5-4.5厘米，3裂至中部，裂片再浅裂。
产陕西延安。生山坡疏林中。
《Flora of China》 Vol. 6 (2001)
Paeonia jishanensis T. Hong & W. Z. Zhao
矮牡丹 ai mu dan
Paeonia spontanea (Rehder) T. Hong & W. Z. Zhao, nom. illeg. (included P. jishanensis); P. suffruticosa Andrews var. jishanensis (T. Hong & W. Z. Zhao) Halda; P. suffruticosa subsp. spontanea (Rehder) S. G. Haw & Lauener; P. suffruticosa var. spontanea Rehder.
Shrubs to 1.8 m tall. Roots attenuate toward tip. Turions present. Stems gray or gray-brown. Proximal leaves 2-ternate; leaflets ovate-orbicular to orbicular, 4--6 × 3.5--4.5 cm, villous along veins or throughout, deeply 3-lobed; lobes again lobed, acute to rounded at apex. Flowers solitary, terminal, single, 10--16 cm wide. Bracts 2 or 3, long elliptic, unequal. Sepals 4 or 5, green, broadly ovate, 2.5--5 × 1.8--2.5 cm, apex rounded. Petals 5--11, white, occasionally pinkish at base or margin, obovate, 4.5--7.2 × 4--6 cm, apex irregularly incised. Filaments pink or purple, white distally, 8--10 mm; anthers yellow, linear, 8--11 mm. Disc wholly enveloping carpels, red-purple, leathery, apex dentate. Carpels 5, densely tomentose. Stigmas red. Follicles oblong, densely brown-yellow tomentose. Fl. Apr--May, fr. Aug. 2n = 10*.
* Secondary deciduous broad-leaved forests, well-developed thickets, sometimes cultivated; 900--1700 m. N Henan (Jiyuan Xian), C Shaanxi (Huayin Xian, Tongchuan Shi), SW Shanxi (Jishan Xian, Yongji Xian).
Hybrids between this species and Paeonia rockii, naturalized in Platycladus orientalis forests in Shaanxi (Yan’an Shi), were treated as P. ′ papaveracea Andrews (Bot. Repos. 7: t. 463. 1807; P. suffruticosa var. papaveracea (Andrews) Kerner; P. yananensis T. Hong & M. R. Li) by Hong and Pan (Nordic J. Bot. 19: 297. 1999), who believed them to have originated from wild individuals of P. jishanensis and cultivated P. rockii .
别名：延安矮牡丹;稷山牡丹;
科名：芍药科 Paeoniaceae
属名：芍药属 Paeonia
1b. 矮牡丹（变种） 图版2: 1-2
Paeonia suffruticosa Andr. var. spontanea Rehd. in Journ. Arn. Arb. 1: 193. 1920; Stern, Stud. Gen. Paeonia 43. 1946; 方文培, 植物分类学报 7(4): 302. 1958; 中国高等植物图鉴 1: 651, 图1302. 1972.
与牡丹的区别：叶背面和叶轴均生短柔毛，顶生小叶宽卵圆形或近圆形，长4-6厘米，宽3.5-4.5厘米，3裂至中部，裂片再浅裂。
产陕西延安。生山坡疏林中。
《Flora of China》 Vol. 6 (2001)
Paeonia jishanensis T. Hong & W. Z. Zhao
矮牡丹 ai mu dan
Paeonia spontanea (Rehder) T. Hong & W. Z. Zhao, nom. illeg. (included P. jishanensis); P. suffruticosa Andrews var. jishanensis (T. Hong & W. Z. Zhao) Halda; P. suffruticosa subsp. spontanea (Rehder) S. G. Haw & Lauener; P. suffruticosa var. spontanea Rehder.
Shrubs to 1.8 m tall. Roots attenuate toward tip. Turions present. Stems gray or gray-brown. Proximal leaves 2-ternate; leaflets ovate-orbicular to orbicular, 4--6 × 3.5--4.5 cm, villous along veins or throughout, deeply 3-lobed; lobes again lobed, acute to rounded at apex. Flowers solitary, terminal, single, 10--16 cm wide. Bracts 2 or 3, long elliptic, unequal. Sepals 4 or 5, green, broadly ovate, 2.5--5 × 1.8--2.5 cm, apex rounded. Petals 5--11, white, occasionally pinkish at base or margin, obovate, 4.5--7.2 × 4--6 cm, apex irregularly incised. Filaments pink or purple, white distally, 8--10 mm; anthers yellow, linear, 8--11 mm. Disc wholly enveloping carpels, red-purple, leathery, apex dentate. Carpels 5, densely tomentose. Stigmas red. Follicles oblong, densely brown-yellow tomentose. Fl. Apr--May, fr. Aug. 2n = 10*.
* Secondary deciduous broad-leaved forests, well-developed thickets, sometimes cultivated; 900--1700 m. N Henan (Jiyuan Xian), C Shaanxi (Huayin Xian, Tongchuan Shi), SW Shanxi (Jishan Xian, Yongji Xian).
Hybrids between this species and Paeonia rockii, naturalized in Platycladus orientalis forests in Shaanxi (Yan’an Shi), were treated as P. ′ papaveracea Andrews (Bot. Repos. 7: t. 463. 1807; P. suffruticosa var. papaveracea (Andrews) Kerner; P. yananensis T. Hong & M. R. Li) by Hong and Pan (Nordic J. Bot. 19: 297. 1999), who believed them to have originated from wild individuals of P. jishanensis and cultivated P. rockii .