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FOC | Family List | FOC Vol. 8 | Saxifragaceae

21. Dichroa Loureiro, Fl. Cochinch. 1: 301. 1790.

常山属 chang shan shu

Huang Shumei (Hwang Shu-mei); Bruce Bartholomew

Shrubs or subshrubs. Leaves opposite, rarely alternate apically on stem. Inflorescence terminal, a corymbose cyme or panicle. Flowers bisexual. Calyx tube adnate to ovary, obconical; lobes 5(or 6). Petals 5(or 6), variously colored, induplicate-valvate in bud. Stamens 4-10(-20); filaments filiform or subulate; anthers ellipsoid to ovoid, 2-loculed. Ovary semi-inferior to subinferior, incompletely 3-5-loculed; placentation parietal; ovules numerous. Styles 2-6, free or connate only at base, divergent; stigma oblong to subglobose. Fruit a fleshy berry, 1-valved, slightly dry. Seeds ovoid, minute; seed coat membranous, reticulate; embryo surrounded by fleshy endosperm.

Twelve species: mainly in E Asia and adjacent islands; six species (four endemic) in China.

1 Ovary semi-inferior; flower buds subglobose; styles (2 or)3(or 4), stigma subglobose; filaments subulate.   (2)
+ Ovary inferior to 3/4 so; flower buds obovoid to oblong-obovoid; styles 4-6 (sometimes 3 in D. hirsuta), stigma oblong; filaments filiform.   (3)
2 (1) Leaf blade densely villous abaxially, glabrous adaxially; inflorescence a corymbose cyme, 5-7 cm   5 D. mollissima
+ Leaf blade crisped pubescent on both surfaces; inflorescence a corymbose panicle, 10-22 cm   6 D. yunnanensis
3 (1) Branchlets, petioles, and leaf veins crisped pubescent or glabrous; inflorescence a corymbose panicle   1 D. febrifuga
+ Branchlets, petioles, and leaf veins both crisped pubescent and pellucid villous; inflorescence a corymbose cyme.   (4)
4 (3) Calyx lobes obtusely deltoid, ca. 1 mm, glabrous   2 D. daimingshanensis
+ Calyx lobes lanceolate, 2.5-6 mm, hirsute.   (5)
5 (4) Petals densely hirsute on both surfaces; anthers glabrous; leaf blade apex acute   3 D. yaoshanensis
+ Petals glabrous or sparsely hirsute abaxially; anthers with filiform hairs or glabrous; leaf blade apex acuminate to caudate   4 D. hirsuta

Lower Taxa


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