Description
provided by eFloras
Subshrubs or shrubs, green, to 25 cm, usually puberulent, sometimes glabrescent, rarely glabrous. Stems erect (branched from bases). Leaves mostly opposite; blades not lobed, linear to acerose, 10–18 mm. Peduncles 0–10 mm, puberulent or glabrous. Calyculi of 5 lance-linear bractlets, lengths 1/2+ phyllaries. Involucres campanulate to cylindric, 5–7 mm. Phyllaries ca. 13, margins of outer distinct less than 1/6 their lengths, abaxial faces puberulent or glabrous. Ray florets 7–8; corollas lemon-yellow, laminae 5–6 × 2–3 mm. Disc florets 18–25+; corollas pale yellow, 3–4 mm. Cypselae 3–3.5 mm; pappi of ca. 20 scales (each a fascicle of 3–5 bristles), 3–4 mm. 2n = 16, 24.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
provided by eFloras
Dyssodia acerosa de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 641. 1836
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Comprehensive Description
provided by North American Flora
Aciphyllaea acerosa (DC.) A. Gray, Mem. Am. Acad. II. 4: 91
1849.
Dyssodia acerosa DC. Prodr. 5: 641. 1836.
Hvmenatherum acerosum A. Gray, PL Wright. 1: 115. 1852.
Dyssodia fusca A. Nelson, Bot. Gaz. 47: 436. 1909.
A suffruticose perennial; stems 1-2 dm. high, much branched; leaves opposite or alternate, crowded, linear-filiform, acerose, 1-2 cm. long, with smaller ones fascicled in their axils; involucre 6-7 mm. high, 3-5 mm. broad; principal bracts obtuse, with two rows of rounded glands; ligules yellow, 3-4 mm. long; disk-corollas yellow, 4 mm. long; lobes 0.5 mm. long; achenes 3 mm. long; pappus 4 mm. long.
Type locality: State of San Luis Potosi. Distribution: Texas to Arizona, Zacatecas, and Hidalgo.
- bibliographic citation
- Per Axel Rydberg. 1915. (CARDUALES); CARDUACEAE; HELENIEAE, TAGETEAE. North American flora. vol 34(2). New York Botanical Garden, New York, NY
