Arnoglossum plantagineum
Fl. Ludov., 65. 1817.
IllustratedEndemic
Synonyms: Cacalia plantaginea (Rafinesque) Shinners Cacalia pteranthes Rafinesque Cacalia tuberosa Nuttall Conophora tuberosa (Nuttall) Nieuwland Mesadenia plantaginea (Rafinewque)Rafinesque Mesadenia tuberosa (Nuttall) Britton Senecio nuttallii Schultz-Bipontinus
Plants 50–100 cm (weakly rhizomatous). Stems angulate. Basal leaves: blades broadly elliptic, to 17 cm, margins entire or sinuate. Cauline leaves: proximal (and mid) petiolate, elliptic (bases rounded), margins entire or serrulate; distal petiolate or sessile, smaller (narrower). Involucres (9.5–)10–12(–14) mm. Phyllaries (pale green) ovate, midvein wings uniform or highest at apices. Corollas white or greenish, 8–10(–11.5) mm. Cypselae fusiform or clavate, 4–5 mm (dark brown, 12–15-ribbed); pappi (6–)7–8(–9) mm. 2n = 54.
Phenology: Flowering May (south)–Aug (north).
Habitat: Wet prairies and pastures, usually in boggy areas in north
Elevation: 0–600 m
Distribution
Ont., Ala., Ark., Ill., Ind., Iowa, Kans., Ky., La., Mich., Minn., Miss., Mo., Nebr., Ohio, Okla., S.Dak., Tenn., Tex., Wis.
Discussion
Selected References
None.
Lower Taxa
None.