Difference between revisions of "Senecio eremophilus"

Richardson

in J. Franklin et al., Narr. Journey Polar Sea, 759. 1823.

Endemic
Treatment appears in FNA Volume 20. Treatment on page 565. Mentioned on page 549, 560.
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|accepted_name=Senecio eremophilus
 
|accepted_name=Senecio eremophilus
|accepted_authority=Richardson in J. Franklin et al.
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|accepted_authority=Richardson
 
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name=Senecio eremophilus
 
name=Senecio eremophilus
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1263.xml
 
|tribe=Asteraceae tribe Senecioneae
 
|tribe=Asteraceae tribe Senecioneae
 
|genus=Senecio
 
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Latest revision as of 18:20, 6 November 2020

Perennials, (20–)40–80(–140) cm (caudices branched, fibrous-rooted). Herbage glabrous or glabrate. Stems single or loosely clustered. Leaves ± evenly distributed (proximal often withering before flowering); petiolate or sessile; blades ovate or lanceolate to narrowly lanceolate, (3–)6–12(–20) × (1–)1.5–5(–7) cm, bases tapered, margins usually pinnate to lacerate, sometimes dentate. Heads 10–60+ in compound corymbiform arrays. Calyculi of 3–5+ (prominent or inconspicuous) bractlets (lengths to 3/4 phyllaries). Phyllaries (± 8) ± 13, 3–8+ mm, tips green or black. Ray florets ± 8; corolla laminae 5–10 mm. Cypselae usually glabrous, sometimes hirtellous. 2n = 38, 40, 44.

Distribution

V20-1263-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Sask., Alaska, Ariz., Colo., Mont., N.Dak., N.Mex., S.Dak., Utah, Wyo., Mostly n, w North America.

Discussion

Varieties 3 (3 in the flora).

Varieties of Senecio eremophilus are distinguished by head size and distribution. Varieties eremophilus and macdougalii are notably different; var. kingii is intermediate in both morphology and distribution.

Selected References

None.

Key

1 Calyculi: bractlets prominent (lengths of at least some to about 3/4 phyllaries); involucres 7–10 mm diam.; phyllaries 6–8 mm, tips green or weakly, if at all, black Senecio eremophilus var. eremophilus
1 Calyculi: bractlets conspicuous or inconspicuous (lengths rarely to 1/2 phyllaries); involucres 5–8 mm diam.; phyllaries 3–6 mm, tips usually black > 2
2 Calyculi: bractlets conspicuous (lengths to 1/2 phyllaries); involucres (5–)6–8 diam.; phyllaries ± 13, (4–)5–6 mm Senecio eremophilus var. kingii
2 Calyculi: bractlets inconspicuous; involucres 4–5(–6) mm diam.; phyllaries ± 8 or ± 13, 3–5 mm Senecio eremophilus var. macdougalii
... more about "Senecio eremophilus"
Theodore M. Barkley† +
Richardson +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Alaska +, Ariz. +, Colo. +, Mont. +, N.Dak. +, N.Mex. +, S.Dak. +, Utah +, Wyo. +, Mostly n +  and w North America. +
in J. Franklin et al., Narr. Journey Polar Sea, +
Compositae +
Senecio eremophilus +
species +