Difference between revisions of "Parthenium confertum"
Proc. Amer. Acad. Arts 17: 216. 1882.
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|name=Parthenium confertum var. divaricatum | |name=Parthenium confertum var. divaricatum | ||
|authority=Rollins | |authority=Rollins | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Parthenium confertum var. lyratum | |name=Parthenium confertum var. lyratum | ||
|authority=(A. Gray) Rollins | |authority=(A. Gray) Rollins | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Parthenium confertum var. microcephalum | |name=Parthenium confertum var. microcephalum | ||
|authority=Rollins | |authority=Rollins | ||
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|publication year=1882 | |publication year=1882 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_35.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Revision as of 15:34, 18 September 2019
Biennials (sometimes flowering first year or persisting), 10–30(–60+) cm. Leaf blades ovate or rounded-deltate to elliptic, 30–80(–120+) × 10–20(–40+) mm, usually ± pinnately or sub-bipinnately lobed, ultimate margins entire, faces strigillose, usually also with erect hairs 1–2 mm and gland-dotted. Heads disciform or obscurely radiate, borne in open, ± paniculiform arrays. Peduncles 2–8(–12+) mm. Phyllaries: outer 5 lance-ovate to elliptic, 2.5–3+ mm, inner 5 ± orbiculate, 3–3.5 mm. Pistillate florets 5; corolla laminae 0 or ± coroniform, 0.1–0.5 mm. Disc florets 20–30+. Cypselae ± obovoid, 2–3 mm; pappus-like enations 2, ± erect, deltate to ovate, 0.5–1 mm (sometimes a third, subulate spur near apex adaxially). 2n = 36, 68, 72.
Phenology: Flowering Mar–Oct.
Habitat: Sandy plains, openings in mesquite grasslands
Elevation: 20–2000 m
Distribution
Ariz., N.Mex., Tex., Mexico.
Discussion
Selected References
None.