Compilation
Senecio andersonii

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Name

Identification
Isotype of Senecio andersonii Clokey [family COMPOSITAE ] Verified by Not on sheet, Senecio spartioides Torr. & A.Gray [family COMPOSITAE ] (stored under name); Verified by Not on sheet,
Related name
  • Senecio multicapitatus
  • Senecio spartioides
  • Senecio andersonii
  • Senecio patagonicus

Flora

Entry for Senecio spartioides Torrey & A. Gray [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Senecio spartioides Torrey & A. Gray [family COMPOSITAE], Fl. N. Amer., 2: 438. 1843
Senecio andersonii Clokey [family COMPOSITAE]
Senecio incurvus A. Nelson [family COMPOSITAE]
Senecio multicapitatus Greenman [family COMPOSITAE]
Senecio serra Hooker var. sanctus H. M. Hall [family COMPOSITAE]
Senecio spartioides var. granularis Maguire & A. H. Holmgren ex Cronquist [family COMPOSITAE]
Senecio toiyabensis S. L. Welsh & Goodrich [family COMPOSITAE]
Treatment Author(s)
Theodore M. Barkley†
Information
Subshrubs, 20–120+ cm (taproots forming woody crowns). Herbage usually glabrous, sometimes sparsely, unevenly hairy. Stems usually multiple (branching and arching upward). Leaves evenly distributed (proximal often smaller); sessile or obscurely petiolate; blades narrowly linear to filiform (or parted into linear-filiform lobes), 5–10 cm × 1–6 mm, bases ± linear, ultimate margins entire. Heads 10–20(–60) in compound corymbiform arrays (involucres cylindric or narrowly campanulate, 3–6 mm diam.). Calyculi 0 or of 1–3+ (minute, inconspicuous) bractlets. Phyllaries usually ± 8, sometimes ± 13, (5–)6–9(–10) mm, tips green or minutely black. Ray florets ± 5 (± 13); corolla laminae 8–12 mm. Cypselae usually hirtellous, sometimes glabrous. 2n = 40.
Phenology
jun-aug (summer), sep-nov (fall)
Altitude range
1000–3500 m;
Distribution
USA Ariz.USA Calif.USA Colo.USA Nebr.USA Nev.USA N.Mex.USA S.Dak.USA Tex.USA UtahUSA Wyo.
Discussion
Plants with the leaves parted into lobes that are seldom more than 1 mm wide have been recognized as Senecio spartioides var. multicapitatus (or as S. multicapitatus); expression of the character is inconsistent throughout the range and recognition of the two entities is all but impossible to maintain.
Senecio spartioides apparently hybridizes with S. eremophilus in Garfield County, Utah, and perhaps elsewhere (cf., Holmgren, Reveal, and LaFrance 3463, BRY, KSC, NY). The name Senecio toiyabensis rests upon materials that suggest introgression with S. fremontii. Some specimens usually referred to 41. S. pattersonensis suggest introgression with S. spartioides.

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