Bitterweed

The single report of Picris rhagadioloides for the flora area (as P. sprengerana from St. Louis; G. Yatskievych, pers. comm.) was confirmed for this study. Picris sprengerana (Linnaeus) Poiret has been misapplied to plants here called P. rhagadioloides (see W. Greuter 2003).

Annuals. Leaf blades 20–60(–90) × 5–20+ mm. Involucres 8–12+ × 6–9+ mm, larger in fruit. Phyllaries proximally navicular, each enfolding its subtended floret, usually bristly and/or tomentulose abaxially. Cypselae (outer often arcuate) 2.5–3 mm; pappi 1–1.5 (outer cypselae) or 5–6 mm (inner cypselae). 2n = 10.

Crepis rhagadioloides Linnaeus, Syst. Nat. ed. 12, 2: 527. 1767; Mant. Pl., 108. 1767