Difference between revisions of "Ambrosia cheiranthifolia"
in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 87. 1859.
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|accepted_name=Ambrosia cheiranthifolia | |accepted_name=Ambrosia cheiranthifolia | ||
| − | |accepted_authority=A. Gray | + | |accepted_authority=A. Gray |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in W. H. Emory, Rep. U.S. Mex. Bound. | |title=in W. H. Emory, Rep. U.S. Mex. Bound. | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Ambrosia cheiranthifolia | name=Ambrosia cheiranthifolia | ||
| − | |authority=A. Gray | + | |authority=A. Gray |
|rank=species | |rank=species | ||
|parent rank=genus | |parent rank=genus | ||
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|publication year=1859 | |publication year=1859 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_20.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 20:10, 5 November 2020
Perennials or subshrubs, 10–30+ cm (rhizomatous and/or soboliferous, colonial). Stems erect. Leaves opposite (distal sometimes alternate); petioles 0; blades lanceolate or lance-elliptic to lance-oblong or oblanceolate, 20–50(–70+) × 8–12(–25+) mm, rarely ± pinnately lobed (lobes ± deltate), bases cuneate (then rounded), margins entire or toothed, abaxial faces densely strigose (silvery gray), adaxial faces strigillose. Pistillate heads clustered (in axils), proximal to staminates; florets 1(–2). Staminate heads: peduncles 1–4+ mm; involucres cup-shaped (sometimes with black nerve in each lobe), 3–4+ mm diam., strigillose; florets 8–18+. Burs: bodies ± pyriform to ± globose, 2–3+ mm, glabrous or strigose, spines (1–)3–5+, scattered, stoutly conic, 0.4–0.8+ mm, tips straight (often each with black nerve). 2n = 72.
Phenology: Flowering Jun–Nov.
Habitat: Seasonally wet clays or sands, scrublands
Elevation: 10–30+ m
Distribution
Tex., Mexico (Tamaulipas).
Discussion
Selected References
None.