Senecio bigelovii
Senecio pattersonensis
nodding groundsel, nodding ragwort
Mono ragwort, Mount Patterson senecio
usually floccose-tomentose to glabrescent, sometimes glabrous.
(sometimes reddish-tinged, especially proximally) glabrous.
single or loosely clustered.
1–3 (arching upward).
progressively reduced distally; petiolate (proximal);
blades ovate to lanceolate, 7–15 × (1–)2–5 cm, bases contracted or tapered, margins subentire or serrate to dentate (mid and distal leaves similar, sessile, bractlike, often clasping).
evenly distributed (proximal often withering before flowering); obscurely petiolate or sessile;
blades oblanceolate to lance-linear (sometimes with 1–2 lateral lobes), 2–4 cm × 3–5 mm, bases subdecurrent, weakly clasping, margins entire or wavy (often revolute).
0.
± 8;
corolla laminae 5–10 mm.
± 13 or ± 21, 6–12 mm, tips green.
± 13, 5–7(–8) mm.
of 4–10 linear bractlets (lengths mostly 1/3–1/2 phyllaries, sometimes 1 or 2 equaling phyllaries).
of 3–5+ (inconspicuous) bractlets.
nodding (especially when young), (1–)3–12(–20) in racemiform or paniculiform arrays (terminal heads often largest).
1(–4).
glabrous.
glabrous.
= 40.
Senecio bigelovii
Senecio pattersonensis
Varieties 2 (2 in the flora).
The two varieties of Senecio bigelovii are distinguished by morphologic tendencies and by geography.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Senecio pattersonensis has the aspect of a depauperate S. fremontii with notably narrow leaves. Some plants in collections appear to be intergrades with S. spartioides.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Herbage glabrous or nearly so (at flowering); blades of proximal leaves often abruptly contracted or at least obtuse at bases; mid and distal leaves clasping; phyllaries mostly 13, 6–8+ mm | var. bigelovii |
1. Herbage often floccose-tomentose, especially among heads and on abaxial faces of leaves; blades of proximal leaves usually tapered to petioles; mid and distal leaves weakly, if at all, clasping; phyllaries mostly 21, (7–)8–12 mm | var. hallii |
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USDA Plants Database
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