Difference between revisions of "Ambrosia deltoidea"
J. Arnold Arbor. 45: 421. 1964.
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|elevation=200–1000 m | |elevation=200–1000 m | ||
|distribution=Ariz.;Mexico (Baja California;Sonora). | |distribution=Ariz.;Mexico (Baja California;Sonora). | ||
| − | |discussion=<p>Some specimens are intermediate for the characteristics that distinguish Ambrosia deltoidea and A. chenopodiifolia. The type of A. deltoidea may be better treated as conspecific with that of A. chenopodiifolia.</p> | + | |discussion=<p>Some specimens are intermediate for the characteristics that distinguish <i>Ambrosia deltoidea</i> and <i>A. chenopodiifolia</i>. The type of <i>A. deltoidea</i> may be better treated as conspecific with that of <i>A. chenopodiifolia</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1964 | |publication year=1964 | ||
|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_12.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Ambrosiinae | ||
Revision as of 16:30, 18 September 2019
Shrubs, 30–80+ cm. Stems erect. Leaves mostly alternate; petioles 5–12+ mm; blades deltate to lance-deltate, 12–25(–35) × 5–12(–18) mm, bases cuneate to truncate, margins toothed, abaxial faces ± densely tomentulose (between veins), adaxial faces sparsely tomentulose, glabrescent. Pistillate heads clustered, proximal to staminates; florets 2–3. Staminate heads: peduncles 0.5–3(–5) mm; involucres ± cup-shaped, 4–8 mm diam., tomentulose; florets 12–30+. Burs: bodies ± fusiform to globose, 3–4 mm, usually stipitate-glandular (little, if at all, tomentulose), spines 20–30+, scattered or on distal 1/2, ± subulate (the proximal basally flattened), 1–3 mm, tips usually straight, sometimes uncinate. 2n = 36.
Phenology: Flowering Feb–May.
Habitat: Sandy washes, benches
Elevation: 200–1000 m
Distribution
Ariz., Mexico (Baja California, Sonora).
Discussion
Some specimens are intermediate for the characteristics that distinguish Ambrosia deltoidea and A. chenopodiifolia. The type of A. deltoidea may be better treated as conspecific with that of A. chenopodiifolia.
Selected References
None.