Plants (50–)60–100(–150) cm. Leaves: basal 25–54 cm, proximal cauline 25–32 cm, proximal cauline blades deltate (distal appearing sessile, petioles prominently winged). Involucres cylindric, 8–12.5 mm. Phyllaries 7–9. Florets 10–14; corollas pale greenish white, 9–10 mm; anthers 1.5–2 mm. Cypselae light golden brown with darker brown veins, 6–9 mm; pappi 4–6 mm. 2n = 40.

Flowering fall. Hydric hammocks; 0–10+ m; Fla.

Hasteola robertiorum is known only from Lake and Levy counties.

SELECTED REFERENCE

Anderson, L. C., E. L. Bridges, and S. L. Orzell. 1995. New data on distribution and morphology for the rare Hasteola robertiorum (Asteraceae). Phytologia 78: 246–248.