Difference between revisions of "Flaveria campestris"
Proc. Amer. Acad. Arts 39: 287. 1903.
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|common_names=Alkali yellowtops | |common_names=Alkali yellowtops | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=E | ||
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|publication title=Proc. Amer. Acad. Arts | |publication title=Proc. Amer. Acad. Arts | ||
|publication year=1903 | |publication year=1903 | ||
| − | |special status= | + | |special status=Illustrated;Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_618.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Flaveriinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Flaveriinae | ||
Latest revision as of 21:13, 5 November 2020
Annuals, 18–70(–90) cm (delicate or robust, mostly glabrous). Stems usually erect (tufted-pubescent at nodes). Leaves sessile; bladeslinear-lanceolate to lanceolate, 30–90 × 6–22 mm, bases barely connate, margins strongly to weakly serrate or spinulose-serrate. heads (10–)15–100+, in tight subglomerules in corymbiform arrays. calyculi of 2 linear-lanceolate bractlets 1–3 mm. involucres urceolate or oblong, 6–7 mm. phyllaries 3, elliptic, obovate, or oblong-obovate. ray florets 0 or 1, laminae yellow, ovate, 1.5–2.5 mm (apices notched). Disc florets 5–6(–8);, corolla tubes 0.8–1.3 mm, throats funnelform, 1.2–1.7 mm. Cypselae oblanceolate, linear, or oblong, 2.8–3.6 mm (those of rays longer by ca. 0.2 mm), pappi 0. 2n = 36 (18).
Phenology: Flowering May–Nov.
Habitat: Saline soils, lake, pond, stream margins, flood plains, and disturbed pastures
Elevation: 1000–1800 m
Distribution
Ariz., Colo., Kans., Mo., N.Mex., Okla., Tex., Utah.
Discussion
Flaveria campestris is distinguished by subglomerulate capitulescences with 5–6(–8) florets per head, subtended by 3 leafy bracts, keeled phyllaries, and linear-lanceolate leaves with serrate or spinulose-serrate margins, and its distribution. The prevalence of F. campestris fluctuates greatly from year to year, generally depending on the existence of wet, saline habitat.
Selected References
None.