Difference between revisions of "Oxytenia"
Proc. Acad. Nat. Sci. Philadelphia 4: 20. 1848.
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|publication year=1848 | |publication year=1848 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_51.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Latest revision as of 20:12, 5 November 2020
Subshrubs or shrubs, 50–200 cm. Stems erect, virgately branched. Leaves cauline; alternate; petiolate or ± sessile; blades mostly pinnately lobed (lobes 3–7+, linear to filiform), distal (not lobed) linear to filiform, faces usually sericeous to strigillose, sometimes glabrate or glabrous, usually gland-dotted. Heads disciform, in (ebracteate or nearly so) paniculiform arrays, or borne singly or in glomerules of 1–5+. Involucres ± hemispheric, 4–5+ mm diam. Phyllaries persistent, 10–15+ in 2–3 series, distinct, outer 5–7 herbaceous, inner scarious to membranous (± villous). Receptacles convex; paleae spatulate to cuneiform, membranous, distally ± villous. Pistillate florets 5; corollas 0. Functionally staminate florets 10–25+; corollas whitish, funnelform, lobes 5, erect (filaments connate, anthers distinct or weakly coherent). Cypselae plumply obovoid, obcompressed or weakly 3–4-angled, smooth, ± villous, little, if at all, gland-dotted; pappi 0. x = 18.
Distribution
w United States.
Discussion
Species 1.
Selected References
None.