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

30. Erigeron strigosus Muhlenberg ex Willdenow, Sp. Pl. 3: 1956. 1803.

糙伏毛飞蓬 cao fu mao fei peng

Erigeron annuus (Linnaeus) Persoon subsp. strigosus (Muhlenberg ex Willdenow) Wagenitz.

Herbs, annual, sometimes biennial or weakly perennial, 30-70 cm tall. Stems erect to ascending, branched in upper part, sparsely to moderately strigose to strigillose or hirsute-strigillose (hairs not spreading). Leaves: surfaces glabrous or glabrate to sparsely strigose or hirsute-strigose; basal usually persistent at anthesis, blade spatulate to oblanceolate or linear, 3-15 × 0.5-2 cm or more, base attenuate, margin entire or shallowly to deeply serrate or crenate, apex acute or obtuse; cauline gradually reduced to near capitula. Capitula 10-200+, in loose corymbiform to paniculate-corymbiform synflorescences. Involucre hemispheric; phyllaries 2-4-seriate, subequal or outer ones shorter, glabrous, strigose, or sparsely hirsute, sometimes minutely glandular, lanceolate, herbaceous. Ray florets 50-100, 2-seriate, 4-6 mm, lamina white, sometimes pinkish or bluish, linear, flat; disk florets yellow, 1.5-2 mm. Achenes lanceolate, flattened, 0.9-1.2 mm, sparsely strigillose. Pappus 2-seriate, outer of scales or setae, inner absent in ray florets, in disk florets of 8-15 long bristles. Fl. Jun-Sep.

Wastelands, roadsides. Naturalized in Anhui, Fujian, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Shandong, Sichuan, Xizang [native to North America].

The variety introduced to China appears to be Erigeron strigosus var. strigosus. This species has been confused with E. annuus, which explains why it is poorly known in China. Its distribution is likely more widespread than shown here.


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