Description
provided by eFloras
Annuals. Stem wings ± con-tinuous, margins spinose, usually white and thickened. Leaf blades 40–200 × 20–80 mm, margins usually white and thickened. Involucres 12–18 × 8–12 mm, larger in fruit. Phyllaries ovate-lanceolate to lanceolate, glabrous. Cypsela/palea units ± obovate, 2.5–4 mm; pappi 0. 2n = 20.
- license
- cc-by-nc-sa-3.0
- copyright
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
