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FOC | Family List | FOC Vol. 8 | Saxifragaceae

24. Schizophragma Siebold & Zuccarini, Fl. Jap. 1: 58. 1837–. 1838.

钻地风属 zuan di feng shu

Wei Zhaofen (Wei Chao-fen); Bruce Bartholomew

Shrubs often scandent, deciduous. Stems prostrate or climbing, with aerial roots. Winter bud scales in 2-4 pairs, dark brown, pubescent. Leaves opposite; leaf blade simple, margin entire, slightly serrulate, or roughly serrate. Inflorescence terminal, corymbose or forming a thyrse. Flowers both fertile and sterile or fertile only. Sterile flowers usually with 1 expanded sepal, petaloid, margin entire. Fertile flowers small. Calyx tube adnate to ovary; teeth persistent. Petals free, valvate in bud, falling early. Stamens 10, free; filaments filiform; anthers ovoid, apex obtuse. Ovary subinferior, obconical to turbinate, 4- or 5-loculed; placentation axile; ovules numerous. Style 1, short; stigma capitate, 4- or 5-fissured. Fruit a loculicidal capsule, obconical to turbinate, striate, apex projected or truncate. Seeds very numerous, fusiform, with long, narrow wings at both ends.

About ten species: China, Japan, Korea; nine species (endemic) in China.

1 Flowers fertile only   9 S. crassum
+ Flowers both fertile and sterile.   (2)
2 (1) Leaf blade abaxially densely granulate glandular.   (3)
+ Leaf blade abaxially not granulate glandular.   (5)
3 (2) Secondary leaf veins usually unbranched; leaf blade elliptic, base cuneate to subobtuse   8 S. elliptifolium
+ Secondary leaf veins usually 1-4-branched; leaf blade narrowly or broadly ovate, base rounded or subcordate.   (4)
4 (3) Leaf blade narrowly ovate, abaxially glabrous or sometimes barbate at vein axils   6 S. hypoglaucum
+ Leaf blade broadly ovate, abaxially densely brownish pubescent along veins   7 S. fauriei
5 (2) Leaf blade margin distally serrate-dentate from middle; sterile flower pedicels less than 1 cm   5 S. corylifolium
+ Leaf blade margin entire or sometimes shortly and acutely denticulate; sterile flower pedicels more than 1 cm.   (6)
6 (5) Leaf blade abaxially densely pubescent, especially along veins   4 S. molle
+ Leaf blade abaxially glabrous, slightly pilose along veins, or densely pubescent only along both sides of midvein, sometimes barbate.   (7)
7 (6) Capsule apex truncate   3 S. choufenianum
+ Capsule apex projected.   (8)
8 (7) Capsule campanulate to turbinate, 6-8 mm, base broadly cuneate; leaf blade abaxially glabrous or slightly pubescent along midvein   1 S. integrifolium
+ Capsule obconical, 8-12 mm, base acute to narrowly cuneate; leaf blade abaxially usually densely pubescent along both sides of midvein   2 S. megalocarpum

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