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Strother, J.L. (2006) Flora of North America: Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Published on the Internet: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=124117 accessed 15 April 2018
Rhizomatous perennials. Stems erect, branched. Leaves opposite; lamina 3-veined, linear-lanceolate to linear; margin entire or toothed. Heads radiate, borne singly. Involucres 10–15 mm in diameter, campanulate to hemispherical; phyllaries persistent, borne in 2–3 series, linear to linear-lanceolate, herbaceous. Receptacles hemispherical, bearing lanceolate to ovate paleae, which become papery. Ray florets 13–21, pistillate, fertile; corollas yellow. Disc florets numerous, bisexual, fertile; corollas yellow; lobes 5, ± triangular. Achenes 3-angled or ± flattened and weakly 4-angled. Pappus 0, or persistent, coroniform. Derivation of name: Named for D. B. Pascal, French/Italian physician-botanist, once director of the royal garden at Parma Worldwide: 2 species in South America Zimbabwe: 1 taxon. |
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