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

47. Spiraea prostrata Maximowicz, Trudy Imp. S.-Peterburgsk. Bot. Sada. 6: 184. 1879.

平卧绣线菊 ping wo xiu xian ju

Shrubs low, prostrate. Branchlets dark red-brown when old, slender, terete, densely yellow-gray villous initially, later glabrescent; buds ovoid, short, with several scales, villous, apex acute. Petiole almost absent; leaf blade broadly ovate, 0.8–1.5 × 0.5–1 cm, densely sericeous on both surfaces, with 2 pairs of prominent lateral veins basally, base rounded or broadly cuneate, margin with 3–7 teeth near apex, apex acute. Racemes shortly pedunculate, umbellate, 7–15-flowered; pedicels 7–8 mm, sparsely villous; bracts lanceolate, 2–4 mm, sparsely villous, later glabrescent. Flowers 5–6 mm in diam. Hypanthium cupular, 1–1.5 mm, sparsely villous abaxially. Sepals ovate-triangular, nearly equaling tube, reflexed in fruit, apex acute. Petals white, orbicular, base shortly clawed. Stamens somewhat shorter than petals. Disk annular, 10-lobed; lobes triangular-ovate. Styles shorter than stamens. Follicles spreading, pubescent on adaxial suture; styles terminal on abaxial side, erect or somewhat divergent. Fr. Jun–Jul.

Thickets, mountain regions, river banks. Gansu, Hubei, Shaanxi.


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