Difference between revisions of "Gutierrezia sphaerocephala"
Mem. Amer. Acad. Arts, n. s. 4: 73. 1849.
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|name=Gutierrezia eriocarpa | |name=Gutierrezia eriocarpa | ||
|authority=A. Gray | |authority=A. Gray | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Xanthocephalum sphaerocephalum | |name=Xanthocephalum sphaerocephalum | ||
|authority=(A. Gray) Shinners | |authority=(A. Gray) Shinners | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Xanthocephalum sphaerocephalum var. eriocarpum | |name=Xanthocephalum sphaerocephalum var. eriocarpum | ||
|authority=(A. Gray) Shinners | |authority=(A. Gray) Shinners | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Gutierrezia;Gutierrezia sphaerocephala | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Gutierrezia;Gutierrezia sphaerocephala | ||
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name=Gutierrezia sphaerocephala | name=Gutierrezia sphaerocephala | ||
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|authority=A. Gray | |authority=A. Gray | ||
|rank=species | |rank=species | ||
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|publication year=1849 | |publication year=1849 | ||
|special status= | |special status= | ||
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Gutierrezia | |genus=Gutierrezia | ||
Latest revision as of 21:01, 5 November 2020
Annuals, 20–50 cm. Stems minutely, prominently, often sparsely, papillate-scabrous (hairs triangular or deltate to lanceolate, less than 0.1 mm). Leaves: proximal usually absent at flowering; cauline blades 1-nerved, linear, 0.5–1.2 mm wide, little reduced distally. Heads in loose arrays. Involucres campanulate, 2.5–5 mm diam. Phyllary apices flat. Ray florets 10–15; corollas yellow, 3–5.5 mm. Disc florets 18–37. Cypselae 0.9–1.2(–1.4) mm, faces without oil cavities, densely strigoso-sericeous in rows (hairs appressed to spreading, apices clavate); pappi of 1 series of narrowly triangular or narrowly oblong scales 0.2–1 mm (distinct or basally connate 1/4–3/4 their lengths, usually shorter in rays). 2n = 8 (10).
Phenology: Flowering (Feb–)May–Dec.
Habitat: Grasslands, roadsides, lake edges, alkaline flats with Atriplex, oak-pine-juniper woodlands, often over gypsum or limestone
Elevation: (200–)1300–2000 m
Distribution
Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas).
Discussion
Selected References
None.