Aphanostephus ramosissimus
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 310. 1836.
Common names: Plains lazydaisy
Illustrated
Annuals, 10–45 cm; vestiture hispidulo-puberulent, stem hairs spreading to deflexed, 0.2–0.6 mm. Phyllary apices acute. Ray florets 20–41. Disc florets: corolla bases not conspicuously swollen and indurate. Cypselae: hairs apically straight; pappi minutely ciliate crowns 0.1–0.2 mm or absent or nearly so. 2n = 8.
Distribution
Ariz., N.Mex., Okla., Tex., Mexico.
Discussion
Varieties 3 (2 in the flora).
Selected References
None.
Key
| 1 | Involucres 4.7–7.5 mm; cypselae (1.1–)1.4–1.6 mm; pappi 0 or minutely ciliate rings 0.1–0.2 mm, sometimes nearly smooth at apices | Aphanostephus ramosissimus var. humilis |
| 1 | Involucres 3.2–4.8 mm; cypselae (1–)1.2–1.4 mm; pappi coroniform, indurate, cupuliform, 0.2–0.6 mm, usually minutely ciliate-tipped | Aphanostephus ramosissimus var. ramosissimus |