Difference between revisions of "Cirsium occidentale var. occidentale"

Common names: Cobwebby thistle
Endemic
Treatment appears in FNA Volume 19. Treatment on page 137. Mentioned on page 138, 139, 140, 159, 161.
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|accepted_name=Cirsium occidentale var. occidentale
 
|accepted_name=Cirsium occidentale var. occidentale
|accepted_authority=unknown
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|accepted_authority=
 
|publications=
 
|publications=
 
|common_names=Cobwebby thistle
 
|common_names=Cobwebby thistle
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|special_status={{Treatment/ID/Special_status
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|code=E
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|label=Endemic
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|elevation=0–200 m
 
|elevation=0–200 m
 
|distribution=Calif.
 
|distribution=Calif.
|discussion=<p>Variety occidentale occupies a variety of habitats in the coastal zone of southern and central California. Considerable variation occurs from population to population in head size, flower color, and pubescence. It sometimes occurs together with and appears to intergrade with var. coulteri. Where there has been no hybridization, the two may be strikingly dissimilar, but individuals of some populations cannot be assigned with confidence to either variety.</p>
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|discussion=<p>Variety occidentale occupies a variety of habitats in the coastal zone of southern and central California. Considerable variation occurs from population to population in head size, flower color, and pubescence. It sometimes occurs together with and appears to intergrade with <i></i>var.<i> coulteri</i>. Where there has been no hybridization, the two may be strikingly dissimilar, but individuals of some populations cannot be assigned with confidence to either variety.</p>
 
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name=Cirsium occidentale var. occidentale
 
name=Cirsium occidentale var. occidentale
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|rank=variety
 
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|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V19_115.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_115.xml
 
|tribe=Asteraceae tribe Cardueae
 
|tribe=Asteraceae tribe Cardueae
 
|genus=Cirsium
 
|genus=Cirsium

Latest revision as of 19:47, 5 November 2020

Plants erect, usually 30–150 cm or taller. Leaf faces usually densely tomentose abaxially, less so and sometimes glabrate adaxially. Heads usually long- pedunculate, sometimes in tight clusters at ends of peduncles, elevated well above proximal leaves. Involucres usually wider than long, 4–5 cm diam., ± densely and persistently arachnoid with fine trichomes connecting tips of adjacent phyllaries. Phyllaries usually ± imbricate, outer ascending or spreading or reflexed, mid phyllary apices ascending to spreading, straight or distally curved, usually 1–2 cm × 1–2 mm. Corollas ± bright purple, usually 25–35 mm. 2n = 28, 29, 30.


Phenology: Flowering spring–summer (Mar–Jul).
Habitat: Coastal scrub, chaparral, oak woodlands, stabilized dunes, roadsides
Elevation: 0–200 m

Discussion

Variety occidentale occupies a variety of habitats in the coastal zone of southern and central California. Considerable variation occurs from population to population in head size, flower color, and pubescence. It sometimes occurs together with and appears to intergrade with var. coulteri. Where there has been no hybridization, the two may be strikingly dissimilar, but individuals of some populations cannot be assigned with confidence to either variety.

Selected References

None.

Lower Taxa

None.