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

2. Gamochaeta pensylvanica (Willdenow) Cabrera, Bol. Soc. Argent. Bot. 9: 375. 1961.

匙叶合冠鼠麴草 shi ye he guan shu qu cao

Gnaphalium pensylvanicum Willdenow, Enum. Pl. 2: 867. 1809, based on G. spathulatum Lamarck, Encycl. 2: 758. 1788, not N. L. Burman (1768); G. chinense Gandoger (1918), not G. sinense (Hemsley) Franchet (1892); G. purpureum Linnaeus subsp. pensylvanicum (Willdenow) O. Bolòs & Vigo; G. purpureum var. spathulatum Baker.

Herbs, annual. Stems erect, simple or more often branching from base, 10-50 cm tall, grayish tomentose. Basal leaves withering at anthesis; cauline leaves remote, scarcely diminishing in size upward, sessile, oblanceolate to spatulate, 2.5-8 × 0.4-1.8 cm, abaxially gray-green and lanate, adaxially greenish and loosely arachnoid, margin entire or slightly wavy, apex rounded to obtuse. Capitula numerous in axillary clusters, forming ± interrupted leafy (leaves 1.5-5.5 cm) spicate panicles, ca. 3 × 1-1.5 mm when dry, densely lanate to 2/3 from base; lower branches usually stalked. Outer phyllaries ovate-lanceolate or lanceolate, 2-2.5 mm, apex long acute; inner ones linear-oblong, ca. 3 mm, apex rounded to shortly acute. Outer florets ca. 100; corolla ca. 2.25 mm. Central florets 2 or 3; corolla ca. 2.25 mm. Achenes brown, elliptic, ca. 0.5 mm, minutely glandular. Pappus white, ca. 2.3 mm, connate at base into a ring. Fl. Jan-May. 2n = 28.

Waste fields, roadsides; below 1500 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [Africa, Asia, Australia, Central and South America, Europe, North America (Mexico)].


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