Difference between revisions of "Hazardia detonsa"

(Greene) Greene

Pittonia 1: 29. 1887.

Common names: Island bristleweed
Basionym: Corethrogyne detonsa Greene Bull. Torrey Bot. Club 10: 41. 1883
Synonyms: Haplopappus detonsus (Greene) P. H. Raven
Treatment appears in FNA Volume 20. Treatment on page 449. Mentioned on page 446.
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|name=Corethrogyne detonsa
 
|name=Corethrogyne detonsa
 
|authority=Greene
 
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|publication_title=Bull. Torrey Bot. Club
 
|publication_title=Bull. Torrey Bot. Club
 
|publication_place=10: 41. 1883
 
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|name=Haplopappus detonsus
 
|name=Haplopappus detonsus
 
|authority=(Greene) P. H. Raven
 
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|rank=species
 
}}
 
}}
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Hazardia;Hazardia detonsa
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Hazardia;Hazardia detonsa
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name=Hazardia detonsa
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|publication year=1887
 
|publication year=1887
 
|special status=
 
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_1036.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V20_1036.xml
 
|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Hazardia
 
|genus=Hazardia

Revision as of 19:23, 16 December 2019

Shrubs, 60–250 cm. Stems lanate-tomentose. Leaves subsessile or subpetiolate; blades obovate, 40–140 × 10–50 mm, subcoriaceous, bases not clasping, margins serrulate to subentire, abaxial faces densely lanate-tomentose, adaxial densely short-tomentose. Heads in thyrsiform to subcorymbiform heads. Involucres campanulate, 10–13 × 10–13 mm. Phyllaries erect, oblong, apices acute, faces densely woolly. Ray florets 6–14, fertile; corollas shorter than involucre, inconspicuous. Disc florets 30–40; corollas 8–10 mm. Cypselae 3–4 mm, canescent. 2n = 10.


Phenology: Flowering Apr–Nov.
Habitat: Open, rocky hillsides, canyon walls, often with Pinus, Quercus, Ceanothus, Rhus, Arctostaphylos
Elevation: 10–300 m

Discussion

Hazardia detonsa is known from Anacapa, Santa Rosa, and Santa Cruz islands. It is little differentiated from H. cana and clearly its evolutionary sister. In both taxa, the ray and disc florets often change to red-purple with maturity.

Selected References

None.

Lower Taxa

None.