Difference between revisions of "Senecio integerrimus"

Nuttall

Gen. N. Amer. Pl. 2: 165. 1818.

IllustratedEndemic
Treatment appears in FNA Volume 20. Treatment on page 556. Mentioned on page 547, 554.
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|distribution=Alta.;B.C.;Man.;Sask.;Calif.;Colo.;Idaho;Iowa;Kans.;Minn.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
 
|discussion=<p>Varieties 5 (5 in the flora).</p><!--
 
|discussion=<p>Varieties 5 (5 in the flora).</p><!--
--><p>The varieties of Senecio integerrimus are distinguished by morphology and geography.</p>
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--><p>The varieties of <i>Senecio integerrimus</i> are distinguished by morphology and geography.</p>
 
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name=Senecio integerrimus
 
name=Senecio integerrimus
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|family=Asteraceae
 
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|distribution=Alta.;B.C.;Man.;Sask.;Calif.;Colo.;Idaho;Iowa;Kans.;Minn.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
 
|reference=None
 
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|publication title=Gen. N. Amer. Pl.
 
|publication title=Gen. N. Amer. Pl.
 
|publication year=1818
 
|publication year=1818
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|special status=Illustrated;Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V20_1230.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1230.xml
 
|tribe=Asteraceae tribe Senecioneae
 
|tribe=Asteraceae tribe Senecioneae
 
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Latest revision as of 18:28, 6 November 2020

Perennials (possibly biennials), (10–)20–70 cm (caudices buttonlike, roots fleshy-fibrous). Herbage arachnose, loosely tomentose, or villous (hairs crisped, jointed), glabrescent. Stems single. Leaves progressively reduced distally; ± petiolate; blades elliptic, lanceolate, linear, oblanceolate, rounded-deltate, or suborbiculate, 6–25 × 1–6 cm, bases ± tapered or truncate to cordate, margins entire or ± dentate (distal leaves sessile, bractlike). Heads 6–20(–40+) in corymbiform arrays (peduncle of terminal head often shorter than others). Calyculi of 1–5+ linear to filiform bractlets (seldom more than 2 mm). Phyllaries usually ± 13 or ± 21, rarely ± 8, (4–)5–12(–15) mm, tips usually black, sometimes green. Ray florets usually ± 8 or ± 13, sometimes 0; corolla laminae 6–15(–20) mm (usually yellow, ochroleucous to white in one variety). Cypselae usually glabrous, sometimes hirtellous (mostly on angles). 2n = 40, 80.

Distribution

V20-1230-distribution-map.gif

Alta., B.C., Man., Sask., Calif., Colo., Idaho, Iowa, Kans., Minn., Mont., N.Dak., N.Mex., Nebr., Nev., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Varieties 5 (5 in the flora).

The varieties of Senecio integerrimus are distinguished by morphology and geography.

Selected References

None.

Key

1 Basal leaves with distinct petioles, blades usually ovate to rounded-deltate, sometimes obovate to oblanceolate; ray corollas white or ochroleucous Senecio integerrimus var. ochroleucus
1 Basal leaves with or without distinct petioles, blades elliptic, lanceolate, oblanceolate, rounded-deltate, sublinear, or suborbiculate; ray corollas yellow (or rays 0) > 2
2 Herbage glabrous or glabrate at flowering (except in leaf axils and among heads); phyllaries linear-subulate, tips usually green, minutely (if at all) black Senecio integerrimus var. integerrimus
2 Herbage usually arachnose, tomentose, or villous at flowering; phyllaries lanceolate to linear-subulate, tips black (if minutely so, then narrowly lanceolate and broader than subulate) > 3
3 Basal and proximal leaves oblong or lanceolate to sublinear; heads 3–6(–16+); phyllaries 10–15+ mm Senecio integerrimus var. scribneri
3 Basal and proximal leaves mostly elliptic to oblanceolate, sometimes elliptic or rounded-deltate to suborbiculate; heads usually 6–15(–30+; if fewer than 6, leaves lanceolate or broader); phyllaries 5–12 mm. > 4
4 Plants copiously arachnose, tomentose, or villous at flowering; phyllaries linear-subulate, 8–12 mm, tips minutely, if at all, blackened Senecio integerrimus var. major
4 Plants copiously to sparsely arachnose, tomentose, or villous at flowering; phyllaries mostly lanceolate (seldom as narrow as linear-subulate), 5–10 mm, tips black Senecio integerrimus var. exaltatus
... more about "Senecio integerrimus"
Theodore M. Barkley† +
Nuttall +
Alta. +, B.C. +, Man. +, Sask. +, Calif. +, Colo. +, Idaho +, Iowa +, Kans. +, Minn. +, Mont. +, N.Dak. +, N.Mex. +, Nebr. +, Nev. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
Gen. N. Amer. Pl. +
Illustrated +  and Endemic +
Compositae +
Senecio integerrimus +
species +