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FOC | Family List | FOC Vol. 9 | Rosaceae | Spiraea

59. Spiraea prunifolia Siebold & Zuccarini, Fl. Jap. 1: 131. 1840.

李叶绣线菊 li ye xiu xian ju

Shrubs to 3 m. Branchlets red-brown, turning gray-brown to black-brown when old, slender, slightly angled, pubescent initially, later gradually glabrescent; buds ovoid, small, with several scales, glabrous, apex subobtuse or subacute. Petiole 2–4 mm, pubescent; leaf blade ovate to oblong-lanceolate, 1.5–3 × 0.7–1.4 cm, pubescent on both surfaces initially, later glabrescent adaxially or on both surfaces, or glabrous, pinnately veined, base cuneate, margin minutely sharply serrate from base or above middle to apex, or 1–4-serrate on each side near apex, apex acute. Umbels sessile, 2–3 × 1.5–3 cm, 3–6-flowered, with a few clustered leaves at base; pedicels 10–24 mm, pubescent; bracts leaflike, 4–7 × 3–5 mm, puberulous on both surfaces initially, finally glabrescent, apex indistinctly minutely serrate. Flowers single in wild plants, double in cultivated plants (var. prunifolia), to 1.2 cm in diam. Hypanthium campanulate, shorter than sepals, pubescent or glabrous abaxially. Sepals triangular or ovate-triangular, 1.5–2 mm, shorter than petals, apex acute. Petals white, obovate or suborbicular, longer than sepals, glabrous. Follicles glabrous, or pubescent along adaxial suture. Fl. Mar–May.

Thickets, slopes, rocks, steep dry cliffs, sunny places also commonly cultivated (var. prunifolia); near sea level to 1500 m. Anhui, Fujian, Guizhou, Guangdong, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Taiwan, Xizang, Zhejiang [Japan, Korea].


1 Flowers double, 1–1.2 cm in diam.   59a var. prunifolia
+ Flowers single, to 1 cm in diam.   (2)
       
2 (1) Leaf blades glabrous abaxially, margin 1–4-serrate on each side near apex; hypanthium often glabrous abaxially.   59d var. hupehensis
+ Leaf blades densely or sparsely pubescent abaxially, margin mostly minutely sharply serrate from near base or above middle to apex; hypanthium pubescent abaxially.   (3)
       
3 (2) Leaf blades sparsely thinly pubescent abaxially, glabrescent when old; follicles pubescent on adaxial suture.   59b var. simpliciflora
+ Leaf blades densely persistently appressed pubescent abaxially; follicles glabrous.   59c var. pseudoprunifolia

Lower Taxa


 

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