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FOC | Family List | FOC Vol. 20-21 | Asteraceae

140. Solidago Linnaeus, Sp. Pl. 2: 878. 1753.

一枝黄花属 yi zhi huang hua shu

Authors: Yilin Chen & John C. Semple

Herbs, perennial, rarely subshrubs; rhizome short to long or woody caudex. Stems decumbent to ascending or erect. Leaves basal (persistent or not by anthesis) and cauline, alternate, sessile or petiolate, blade ovate to broadly to narrowly lanceolate. Capitula usually small, radiate, numerous in terminal racemiform, paniculiform, or corymbose-paniculiform synflorescences. Involucre narrowly campanulate to ± cylindric; phyllaries 3-5-seriate, imbricate or subequal, linear-lanceolate, deltate, or oblong, herbaceous, margin scarious, apex rounded to obtuse or acute to attenuate. Receptacles slightly convex, alveolate, naked. Florets fertile; ray florets female, 1-seriate, usually yellow, usually glabrous, apex inconspicuously 2- or 3-denticulate; disk florets bisexual, yellow turning brown with age, tubular, limb expanded or narrow, apex 5-denticulate; anther base obtuse; style branches flattened, appendage lanceolate. Achenes obconic to cylindric, sometimes ± laterally compressed, glabrous or moderately strigillose, 8-10-ribbed. Pappus of outer short setiform scales rarely present, and 2 series of 25-45 fine, persistent, long, barbellate bristles, mid series 90%-95% length of inner, apically attenuate, inner apically very weakly to moderately clavate.

About 120 species: mainly in North America, a few species in Asia, Europe, and South America; six species (three introduced) in China.

1 Synflorescence racemiform, long paniculiform, or corymbose-paniculiform, branches erect, inserted around stem, capitula attached around branch; involucre 3.5-9.5(-10) mm; inner (longest) pappus bristles weakly to moderately clavate   (2)
+ Synflorescence pyramidal, secund, branches usually spreading, curved, capitula attached on upper side of branch; involucre 2.3-4 mm; inner (longest) pappus bristles not obviously clavate   (4)
2 (1) Phyllaries rounded or obtuse; involucre 4-6 mm; rare, occurs in NE China.   3 S. pacifica
+ Phyllaries acuminate or acute; involucre 3.5-9.5(-10) mm   (3)
3 (2) Upper stem leaves small, length from widest point to apex 6.5-31.5 mm, mean 14.3 mm; involucre 3.5-7.7 mm; pappus bristles 3.1-5.2 mm; E and S China, common.   1 S. decurrens
+ Upper stem leaves larger, length from widest point to apex 25-45 mm, mean 34.5 mm; involucre 6-9.5(-10) mm; pappus bristles 4.5-7 mm; NE and far W China.   2 S. dahurica
4 (1) Stem leaves with multiple prominent lateral veins.   4 S. rugosa
+ Stem leaves with 2 very prominent lateral veins (triplinerved)   (5)
5 (4) Upper stem leaves sharply serrate, abaxial veins sparsely hairy; involucre 2.5-3 mm; lower stem glabrous or hairy.   5 S. canadensis
+ Upper stem leaves entire, abaxial veins densely hairy; involucre 3-4 mm; lower stem hairy.   6 S. altissima

Lower Taxa


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