Arnoglossum atriplicifolium

(Linnaeus) H. Robinson

Phytologia 28: 294. 1974

Synonyms: Cacalia paniculata RafinesqueConophora atriplicifolia (Linnaeus) NieuwlandConophora similis (Small) NieuwlandMesadenia atriplicifolia (Linnaeus) RafinesqueMesadenia pulverulenta RafinesqueMesadenia rotundifolia RafinesqueMesadenia similis SmallSenecio atriplicifolius (Linnaeus) Hooker
Basionyms: Cacalia atriplicifolia Linnaeus
Treatment appears in FNA Volume 20. Treatment on page 623.
Plants 100–300 cm (rhizomatous). Stems smooth to weakly striate (glaucous). Basal leaves: blades usually ovate or ovate-cordate, to 21 cm (bases truncate or subcordate), margins shallowly lobed or dentate (sinuses smooth). Cauline leaves: (abaxial faces pale green, glaucous) proximal petiolate, ± deltate, margins coarsely dentate; distal petiolate or sessile, smaller. Involucres (7.5–)8–10(–10.5) mm. Phyllaries (pale green) oblong, midveins not winged (tips obtuse to acute, sparsely papillate). Corollas white, usually with green, sometimes purple, 8–9.5(–13) mm. Cypselae fusiform or ellipsoid, 4–5 mm (brown or purplish, 8–10-ribbed); pappi 5–6(–7) mm (readily falling). 2n = 50, 52, 56.

Phenology: Flowering Jul–Nov.
Habitat: Edges of woods, pastures, roadsides
Elevation: 10–600 m

Distribution

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Ala., Ark., Del., Fla., Ga., Ill., Ind., Kans., Ky., Md., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Va., W.Va., Wis.

Discussion

References

None.

Lower Taxa

No lower taxa listed.