Aphanostephus skirrhobasis

(de Candolle) Trelease

Rep. (Annual) Arkansas Geol. Surv. 4: 191. 1891

Common names: Arkansas lazydaisy
Basionyms: Keerlia skirrhobasis de Candolle
Treatment appears in FNA Volume 20. Treatment on page 352. Mentioned on page 351.
Annuals, 5–45 cm; vestiture hirsuto-pilose and/or puberulent, stem hairs spreading to deflexed, 0.1–0.3 mm. Phyllary apices acute to short-acuminate. Ray florets (10–)25–45. Disc floret corollas: bases (mature) bulbous-swollen, indurate. Cypselae: hairs apically 1-directionally coiled; pappi usually coroniform, uneven, rarely of acute to awn-tipped scales 0.2–2 mm.



s United States, n Mexico.


Varieties 3 (3 in the flora).




1 Leaves thickened, densely, almost felty gray-hairy; sand dunes along Gulf Coast Aphanostephus skirrhobasis var. thalassius
1 Leaves not strongly thickened or felty gray-hairy; sandy soils, interior localities > 2
2 Pappi of acute or awn-tipped scales or setiform scales 0.4–2 mm Aphanostephus skirrhobasis var. kidderi
2 Pappi coroniform, uneven, ciliate, 0.1–0.3 mm, rarely of awn-tipped scales Aphanostephus skirrhobasis var. skirrhobasis