Difference between revisions of "Gutierrezia arizonica"
Sida 8: 313. 1980.
Common names: Arizona snakeweed
Basionym: Greenella arizonica A. Gray Proc. Amer. Acad. Arts 16: 81. 1880
Synonyms: Xanthocephalum arizonicum (A. Gray) Shinners
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|common_names=Arizona snakeweed | |common_names=Arizona snakeweed | ||
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|name=Greenella arizonica | |name=Greenella arizonica | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=species | ||
| + | |publication_title=Proc. Amer. Acad. Arts | ||
| + | |publication_place=16: 81. 1880 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Xanthocephalum arizonicum | |name=Xanthocephalum arizonicum | ||
|authority=(A. Gray) Shinners | |authority=(A. Gray) Shinners | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Gutierrezia;Gutierrezia arizonica | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Gutierrezia;Gutierrezia arizonica | ||
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name=Gutierrezia arizonica | name=Gutierrezia arizonica | ||
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|authority=(A. Gray) M. A. Lane | |authority=(A. Gray) M. A. Lane | ||
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|publication year=1980 | |publication year=1980 | ||
|special status= | |special status= | ||
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Gutierrezia | |genus=Gutierrezia | ||
Latest revision as of 21:00, 5 November 2020
Annuals, 12–30 cm. Stems glabrous. Leaves: basal sometimes persistent, proximal usually absent at flowering; cauline blades 1-nerved, narrowly elliptic-oblanceolate to elliptic-lanceolate, 1–2 mm wide, reduced distally. Heads borne singly or in loose, open arrays. Involucres campanulate, 4–7 mm diam. Phyllary apices flat. Ray florets 8–15; corollas white, drying light yellow or reddish, 6–7.5 mm. Disc florets (16–)20–30(–40). Cypselae 0.9–1.6 mm, faces without oil cavities, densely strigoso-sericeous (hair apices prominently bulbous-capitate); pappi coroniform or of 1 series of basally connate scales 0.1–0.3 mm (obscured by cypsela indument). 2n = 8.
Phenology: Flowering (Feb–)Mar–May.
Habitat: Sandy or sandy-rocky plains or washes
Elevation: 200–1300 m
Distribution
Ariz., Mexico (Sonora).
Discussion
Selected References
None.
Lower Taxa
None.