Longleaf False Goldeneye

Annuals, 7–15 cm (taprooted). Stems strigose. Leaves usually opposite proximally, sometimes alternate (distal); blades lance-linear to linear, 10–160 × 1.5–8(–12) mm, margins ciliate to ¹/4 their lengths, hairs mostly less than 0.5 mm, faces strigose to strigillose (hair bases narrowly tuberculate), abaxial often gland-dotted. Heads 6–25+. Peduncles 0.2–0.5(–2) cm, lengths ¹/20–¹/2 times leafy portions of stems. Involucres 6–14 mm diam. Phyllaries 3–6 mm. Paleae oblong, 4–4.5 mm, acute to cuspidate. Ray florets 12–14; laminae ± elliptic, 5–17 mm (glabrous or puberulent). Disc florets 50+; corollas 2.5–4 mm. Cypselae black or mottled, 1.8–2 mm.

Gymnolomia longifolia B. L. Robinson & Greenman, Proc. Boston Soc. Nat. Hist. 29: 92. 1899; Viguiera longifolia (B. L. Robinson & Greenman) S. F. Blake