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San Joaquin Snakeweed

Gutierrezia californica (DC.) Torr. & A. Gray

Comments

provided by eFloras
Following D. D. Keck (1960) and M. A. Lane (1985), Gutierrezia californica is treated here as a variable taxon that includes G. divergens. O. T. Solbrig (1965, 1970) considered G. californica to be a narrow endemic restricted to serpentine outcrops of the San Francisco Bay region, in which case the earliest name for the more widely distributed plants, including those of Mexico, is G. divergens Greene. Molecular evidence (Y. Suh and B. B. Simpson 1990) tentatively supports the recognition of the serpentine endemic; more detailed sampling would be needed for an objective decision. The morphologic differences are quantitative and overlapping. Intergrades between G. californica in the broad sense and G. sarothrae are said to occur in California (Lane 1993).
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 90, 93, 94 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Subshrubs, 20–70 cm. Stems glabrous or minutely hispidulous. Leaves: basal absent at flowering; cauline blades 1-nerved, filiform to linear, 0.5–1(–1.3) mm wide, reduced distally, often reduced in arrays to tiny, curved bracts. Heads borne singly or (sometimes subsessile and in clusters of 2–3) in loose arrays. Involucres turbinate to cylindric-turbinate (longer than diams.), 2.5–4 mm diam. Phyllary apices flat. Ray florets 4–13; corollas yellow, 2.5–7 mm. Disc florets (4–)6–13. Cypselae 2–2.8 mm, faces densely strigoso-sericeous; pappi of 1–2 series of lanceolate to oblanceolate scales 1.5–2.2 mm. 2n = 16, 24.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 90, 93, 94 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
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eFloras

Synonym

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Brachyris californica de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 313. 1836; Gutierrezia bracteata Abrams; G. divergens Greene; Xanthocephalum californicum (de Candolle) Greene
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 90, 93, 94 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Gutierrezia californica

provided by wikipedia EN

Gutierrezia californica is a North American species of flowering plant in the family Asteraceae known by the common names San Joaquin snakeweed and California matchweed. It is native to California and Arizona in the United States and Baja California in Mexico.[2][3][4] It grows in sunny sandy or rocky areas in grasslands, scrub, or open woodlands.[5]

This is a small subshrub reaching up to about half a meter (20 inches) in height. It grows clumpy or gangly and generally erect stems in shades of gray and red which are lined with small linear green leaves.[5]

At the end of each branch of the stem is an inflorescence of one to three small flower heads just a few millimeters wide. The head contains several yellow disc florets with long, protruding styles and several yellow ray florets around the edge.[5]

References

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Gutierrezia californica: Brief Summary

provided by wikipedia EN

Gutierrezia californica is a North American species of flowering plant in the family Asteraceae known by the common names San Joaquin snakeweed and California matchweed. It is native to California and Arizona in the United States and Baja California in Mexico. It grows in sunny sandy or rocky areas in grasslands, scrub, or open woodlands.

This is a small subshrub reaching up to about half a meter (20 inches) in height. It grows clumpy or gangly and generally erect stems in shades of gray and red which are lined with small linear green leaves.

At the end of each branch of the stem is an inflorescence of one to three small flower heads just a few millimeters wide. The head contains several yellow disc florets with long, protruding styles and several yellow ray florets around the edge.

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Wikipedia authors and editors
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wikipedia EN