Chrysopsis hyssopifolia Nuttall, J. Acad. Nat. Sci. Philadelphia 7: 67. 1834; C. gigantea Small; C. mixta Dress; C. trichophylla (Nuttall) Elliott var. hyssopifolia (Nuttall) Torrey & A. Gray; Diplogon hyssopifolia (Nuttall) Kuntze; Heterotheca hyssopifolia (Nuttall) R. W. Long

Short-lived perennials (usually), 30–80 cm. Stems 1–5 (older plants), ascending to erect, rarely procumbent, usually simple. Leaves: mid to distal cauline sometimes numerous (to 75 on tall stems), sometimes crowded; blades linear to lanceolate, margins coarsely long-pilose, faces sparsely pilose to glabrate. Heads usually in subumbelliform, sometimes in compound, subumbelliform arrays. Phyllaries: apices spreading, faces glabrate. 2n = 18.

Flowering late Sep–Dec. Sandy and clay soils, open pine flatwoods, oak-pine scrub, disturbed areas; 0–50 m; Ala., Fla., La., Miss.

A few plants similar to subsp. hyssopifolia have been collected in northern peninsular Florida.