Senecio neowebsteri
Senecio mohavensis
Olympic Mountain ragwort
Mohave groundsel, Mojave ragwort
(sometimes purplish-tinged) floccose-tomentose, unevenly glabrescent.
(sometimes purple-tinged) glabrous.
single or loosely clustered (erect or arching).
usually 1 (freely branching upward).
mostly cauline;
petiolate (petioles about equaling blades);
blades lanceolate or oblanceolate to ovate, (2–)4–8+ × 1.5–3 cm, bases tapered, margins denticulate (distal leaves smaller, lanceolate or linear-lanceolate, bractlike).
equally distributed;
petiolate;
blades ovate to obovate, 2–6 × 0.5–2(–4) cm, bases tapered, margins coarsely lobed or irregularly dentate (mid and distal leaves similar, bases expanded, truncate to cordate, clasping, 1–2 cm across).
± 13;
corolla laminae ± 15 mm.
0 or 1–3+;
corolla laminae 0.1–1 mm (little expanded, barely, if at all, surpassing phyllaries; sometimes laminae 0 and heads perhaps technically disciform).
usually ± 21, sometimes ± 13, (8–)10–15 mm, tips usually greenish (often sparsely hairy).
± 8 or ± 13, 6–7 mm, tips green.
of 4–8 lanceolate to lance-linear bractlets (lengths mostly less than 1/2 phyllaries).
of 3–5+ lance-linear bractlets.
nodding, 1(–2).
3–10 in loose, cymiform arrays.
glabrous.
hairy.
= 40.
= 40.
Senecio neowebsteri
Senecio mohavensis
Of conservation concern.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Senecio mohavensis is similar to S. flavus (Decaisne) Schultz-Bipontinus of the Mediterranean region and southwest Asia, which raises phytogeographic questions (cf. A. Liston et al. 1989; Liston and J. W. Kadereit 1995; M. Coleman et al. 2001). The last cited study showed that a previously recognized variety of S. flavus is more closely related to S. mohavensis than to S. flavus and a new combination was made: S. mohavensis subsp. brevifolius (Kadereit) M. Coleman.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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USDA Plants Database
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