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

34. Spiraea siccanea (W. W. Smith) Rehder, J. Arnold Arbor. 19: 205. 1933.

干地绣线菊 gan di xiu xian ju

Spiraea yunnanensis Franchet var. siccanea W. W. Smith, Notes Roy. Bot. Gard. Edinburgh 10: 67. 1917.

Shrubs 1–1.5 m tall. Branchlets brown or red-brown, slender, terete, pubescent when young, later glabrescent; buds ovoid, with several scales, pubescent initially, apex acute. Petiole 2–5 mm, sparsely pubescent or glabrous; leaf blade abaxially gray-green, adaxially dark green, obovate or oblong, 1–2.5 × 0.7–1.8 cm, abaxially subglabrous or puberulous only on veins, adaxially glabrous, prominently 3–5-veined, base broadly cuneate or subrounded, margin irregularly crenate above middle, usually shallowly 3-lobed, apex obtuse. Umbels pedunculate, 2–3 × 2–2.5 cm, 5–17-flowered; pedicels 7–10 mm, densely pubescent; bracts linear, 1.5–3 mm, pubescent. Flowers 4–6 mm in diam. Hypanthium campanulate, densely pubescent abaxially. Sepals triangular, 1–1.5 × 1–1.5 mm, mostly erect in fruit, apex acute. Petals white, broadly obovate, 3–3.5 × 3.5–4.5 mm, glabrous, base shortly clawed, apex emarginate. Stamens 18–20, shorter than or nearly equaling petals. Disc conspicuous, 10-lobed. Styles shorter than stamens. Follicles spreading, pubescent; styles terminal, slightly divergent, ca. 1 mm. Fl. Jun–Jul, fr. Sep–Oct.

Slopes, open rocky places; 2500--2800 m. NW Yunnan.


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