Dimeresia
in A. Gray et al., Syn. Fl. N. Amer. ed. 2, 1(2): 448. 1886.
| Taxon | Illustrator ⠉ | |
|---|---|---|
 | Dimeresia howellii Coreopsis californica Coreopsis tripteris | Marjorie C. Leggitt Yevonn Wilson-Ramsey Yevonn Wilson-Ramsey |
Annuals, 1–3 (–5) cm. Stems decumbent to erect. Leaves basal and/or cauline; opposite (crowded, seemingly whorled); subsessile or ± petiolate; blades spatulate to oblanceolate, entire. Heads discoid, in clusters (of 2–5, congested, total heads to 100+). Involucres cylindric to obconic, 2 (–4) mm diam. Phyllaries 2 (–3) in 1 series (basally distinct or connate, oblong, herbaceous). Ray-florets 0. Disc-florets 2 (–3), bisexual, fertile; corollas white, pink, or purple, tubes slightly shorter than funnelform throats, lobes 5, deltate-ovate. Receptacles minute, epaleate. Cypselae cylindric to clavate, striate, glabrous; pappi falling, of ca. 20 basally connate, setiform to subulate, ± plumose scales (or flattened bristles). x = 7.
Distribution
w United States
Discussion
Species 1.
Selected References
None.