Dysodiopsis
in N. L. Britton et al., N. Amer. Fl. 34: 170. 1915.
| Taxon | Illustrator ⠉ | |
|---|---|---|
 | Dysodiopsis tagetoides Adenophyllum cooperi Thymophylla acerosa | Marjorie C. Leggitt Barbara Alongi Yevonn Wilson-Ramsey |
Annuals or perennials, 40–80+ cm. Stems erect, distally branched. Leaves cauline; mostly opposite (distal alternate); blades linear, margins coarsely toothed, faces glabrous (bases ± setaceous, oil-glands scattered along midveins). Heads radiate, in loose, corymbiform arrays or borne singly. Calyculi of 5–8 subulate or pinnatisect bractlets (bearing oil-glands). Involucres ± campanulate, 5–8 mm diam. Phyllaries persistent, 10–12 in 2 series (strongly connate, oblong to linear, margins of outer free to bases, faces of all or outer bearing submarginal and subapical oil-glands). Receptacles convex, pitted (socket margins fimbrillate), epaleate. Ray-florets 7–12, pistillate, fertile; corollas lemon to greenish yellow. Disc-florets 20–40+, bisexual, fertile; corollas dull yellow, tubes shorter than cylindro-funnelform throats, lobes 5, deltate. Cypselae obpyramidal, glabrous or sparsely strigillose; pappi persistent, of 10–12, 1 (–3) -aristate scales in ± 2 series. x = 13.
Distribution
sc United States
Discussion
Species 1.
Selected References
None.