Difference between revisions of "Isocoma acradenia"

(Greene) Greene

Erythea 2: 111. 1894.

Common names: Alkali jimmyweed
Illustrated
Basionym: Bigelowia acradenia Greene Bull. Torrey Bot. Club 10: 126. 1883 (as Bigelovia)
Synonyms: Haplopappus acradenius (Greene) S. F. Blake
Treatment appears in FNA Volume 20. Treatment on page 440.
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|common_names=Alkali jimmyweed
 
|common_names=Alkali jimmyweed
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|code=F
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|name=Bigelowia acradenia
 
|name=Bigelowia acradenia
 
|authority=Greene
 
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|publication_title=Bull. Torrey Bot. Club
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|publication_place=10: 126. 1883 (as Bigelovia)
 
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|synonyms={{Treatment/ID/Synonym
 
|synonyms={{Treatment/ID/Synonym
 
|name=Haplopappus acradenius
 
|name=Haplopappus acradenius
 
|authority=(Greene) S. F. Blake
 
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|rank=species
 
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|hierarchy=Asteraceae;Asteraceae tribe Astereae;Isocoma;Isocoma acradenia
 
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Isocoma;Isocoma acradenia
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|distribution=sw United States;nw Mexico.
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|distribution=Ariz.;Calif.;Nev.;Utah;nw Mexico.
 
|discussion=<p>isocoma acradenia is distinctive in its whitish stems and narrow, whitish-indurate phyllaries with an apical resin pocket (or pockets). the leaves often occur in axillary fascicles</p><!--
 
|discussion=<p>isocoma acradenia is distinctive in its whitish stems and narrow, whitish-indurate phyllaries with an apical resin pocket (or pockets). the leaves often occur in axillary fascicles</p><!--
 
--><p>Varieties 3 (3 in the flora).</p>
 
--><p>Varieties 3 (3 in the flora).</p>
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name=Isocoma acradenia
 
name=Isocoma acradenia
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|authority=(Greene) Greene
 
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|basionyms=Bigelowia acradenia
 
|basionyms=Bigelowia acradenia
 
|family=Asteraceae
 
|family=Asteraceae
|distribution=sw United States;nw Mexico.
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|distribution=Ariz.;Calif.;Nev.;Utah;nw Mexico.
 
|reference=None
 
|reference=None
 
|publication title=Erythea
 
|publication title=Erythea
 
|publication year=1894
 
|publication year=1894
|special status=
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|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V20_1006.xml
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|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Isocoma
 
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Latest revision as of 18:24, 6 November 2020

Herbage usually glabrous, sometimes minutely hispidulous, often stipitate-glandular, often resinous. Leaf blades oblanceolate to narrowly obovate, 20–150 mm, margins entire or toothed or lobed (teeth or lobes apically rounded-obtuse). Involucres 5–8 × 5–7 mm. Phyllary apices yellowish to greenish yellow, sometimes spinulose-aristate, usually not gland-dotted, usually with single, strongly developed, subepidermal resin pocket nearly as wide as bracts, sometimes a central pocket and 2+ smaller, lateral ones (resin pockets sometimes formed from numerous, coalesced, sessile glands). Florets 12–27; corollas 5–7(–8) mm. Cypsela ribs not forming apical horns.

Distribution

V20-1006-distribution-map.gif

Ariz., Calif., Nev., Utah, nw Mexico.

Discussion

isocoma acradenia is distinctive in its whitish stems and narrow, whitish-indurate phyllaries with an apical resin pocket (or pockets). the leaves often occur in axillary fascicles

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Leaves 50–150 mm; florets 20–27; phyllaryapices spinulose-aristate Isocoma acradenia var. bracteosa
1 Leaves 20–50 mm; florets 12–24; phyllary apices usually rounded, not spinulose, sometimes with weakly developed aristae > 2
2 Leaves usually entire, proximal rarely toothed or lobed Isocoma acradenia var. acradenia
2 Leaves all toothed to pinnatifid Isocoma acradenia var. eremophila