Senecio actinella

Greene

Bull. Torrey Bot. Club 10: 87. 1883.

Synonyms: Senecio actinella var. mogollonicus (Greene) Greenman Senecio mogollonicus
Treatment appears in FNA Volume 20. Treatment on page 553. Mentioned on page 547.

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). Heads 1 (–3). Calyculi of (1–) 5–8+ linear to filiform bractlets (lengths 1/3–3/4 phyllaries). Phyllaries ± 21, 8–12 mm, tips greenish (with white bristles). Ray-florets ± 13; corolla laminae usually 8–10 mm (sometimes tubular, unexpanded, heads then perhaps technically disciform). Cypselae hairy.


Phenology: Flowering summer.
Habitat: In duff, rocky woodlands, especially in pine-dominated areas
Elevation: 2000–3000 m

Distribution

V20-1219-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Durango)

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.

Selected References

None.

Lower Taxa

None.
... more about "Senecio actinella"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Greene +
tapered +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
obovate +
1cm;2cm +
winged;nerved;ribbed +
linear;filiform +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +  and Mexico (Durango) +
2000–3000 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
In duff, rocky woodlands, especially in pine-dominated areas +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrescent +  and lanate-tomentose +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
subentire +  and denticulate +
2-carpellate +
persistent +
Flowering summer. +
mostly oblong +  and lanceolate or linear +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Senecio actinella var. mogollonicus +  and Senecio mogollonicus +
Senecio actinella +
species +
campanulate +
denticulate +  and serrate or toothed +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +