Senecio arizonicus

Greene

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

Endemic
Treatment appears in FNA Volume 20. Treatment on page 555. Mentioned on page 547.

Perennials, (20–) 30–40 (–60) cm (rhizomes suberect or weakly spreading). Herbage lanate-arachnose or tomentose, unevenly glabrescent. Stems 1 (–2). Leaves (often purplish abaxially) reduced distally; petiolate; blades ovate to subelliptic, (5–) 6–10 (–15) × (2.5–) 3–5 (–9) cm, bases tapered or contracted, margins subentire to denticulate (denticles callous; mid and distal leaves bractlike). Heads (2–) 5–12 (–20) in corymbiform arrays. Calyculi of 2–5+ bractlets (largest to 3 mm). Phyllaries (± 13) ± 21, 5–7 mm, tips green. Ray-florets ± 13; corolla laminae 5–10 mm. Cypselae hairy (especially on angles). 2n = 40.


Phenology: Flowering late spring–summer.
Habitat: Openings in pine-oak woodlands
Elevation: 1600–2100 m

Discussion

Senecio arizonicus is reputedly in southern New Mexico (W. C. Martin and C. R. Hutchins 1980); that seems unlikely and should be checked.

Selected References

None.

Lower Taxa

None.
... more about "Senecio arizonicus"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Theodore M. Barkley† +
Greene +
tapered +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
ovate;subelliptic +
3cm;5cm +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
1600–2100 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Openings in pine-oak woodlands +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrescent +, tomentose +  and lanate-arachnose +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
cauline +  and basal +
reduced +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
subentire +  and denticulate +
2-carpellate +
persistent +
Flowering late spring–summer. +
mostly oblong +  and lanceolate or linear +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
1 (?) +  and 2 (?) +
appendaged +  and truncate +
papillate +
Compositae +
Senecio arizonicus +
species +
campanulate +
denticulate +  and serrate or toothed +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +