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2a. Croptilon hookerianum (Torrey & A. Gray) House var. validum (Rydberg) E. B. Smith, Sida. 9: 61. 1981.
Isopappus validus Rydberg, Brittonia 1: 100. 1931; Haplopappus validus (Rydberg) Cory
Stems and peduncles densely long-stipitate-glandular (longest hairs 0.4–0.5 mm, including glands), often slightly hispid proximal to heads. Ray laminae 1–2.5 mm wide. 2n = 10 (11, 12).
Flowering (Jun–)Jul–Oct. Sand, sandy gravel, dunes, stream terraces, sandstone outcrops, often in areas of oak woodlands, roadsides, roadbanks; 20–400 m; Ark., Kans., Okla., Tex.
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