Flora of North America species comparison

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Senecio actinella

Flagstaff ragwort
Habit Perennials, (7–)20–30(–40+) cm (rhizomes exfoliating).
Herbage

densely lanate-tomentose, glabrescent (especially on adaxial faces of leaves).
Stems

single.
Leaves

mostly basal; petiolate;

blades narrowly obovate, (2–)3–7(–10) × 1–2(–3+) cm, bases tapered, margins subentire to denticulate (cauline leaves bractlike).
Ray florets

± 13;

corolla laminae usually 8–10 mm (sometimes tubular, unexpanded, heads then perhaps technically disciform).
Phyllaries

± 21, 8–12 mm, tips greenish (with white bristles).
Calyculi

of (1–)5–8+ linear to filiform bractlets (lengths 1/3–3/4 phyllaries).
Heads

1(–3).
Cypselae

hairy.

Senecio actinella
Phenology Flowering summer.
Habitat In duff, rocky woodlands, especially in pine-dominated areas
Elevation 2000–3000 m (6600–9800 ft)
Distribution
from FNA
AZ; NM; Mexico (Chihuahua, Durango)
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants of Senecio actinella with relatively small proximal leaves similar to basal leaves and adaxial leaf faces early glabrate have been recognized as var. mogollonicus; the distinction is difficult to maintain. Receptacles in Senecio actinella are sometimes insect-infested.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 553.
Parent taxa Asteraceae > tribe Senecioneae > Senecio
Sibling taxa
S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii
Synonyms S. actinella var. mogollonicus, S. mogollonicus
Name authority Greene: Bull. Torrey Bot. Club 10: 87. (1883)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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