Senecio wootonii

Greene

Bull. Torrey Bot. Club 25: 122, plate 331, figs. 1, 2. 1898.

Synonyms: Senecio anacletus Greene
Treatment appears in FNA Volume 20. Treatment on page 554. Mentioned on page 547.

Perennials, (15–) 20–45 (–60) cm (caudices erect or weakly spreading). Herbage nearly always glaucous, glabrous. Stems single or clustered. Leaves (thickish and turgid) progressively reduced distally; petiolate; blades ovate or obovate to lanceolate, 4–9 (–15+) × 1.5–3 (–4+) cm, bases tapered, margins wavy or subentire (often with callous denticles; mid and distal leaves sessile, bractlike). Heads (3–) 8–24+ in corymbiform arrays. Calyculi of 1–3+ oblong to lance-linear bractlets (less than 3 mm). Phyllaries ± 13 (± 21), 6–9 mm, tips green to brownish (not blackened). Ray-florets 8–10; corolla laminae 4–10 mm. Cypselae glabrous. 2n = 40.


Phenology: Flowering spring–summer.
Habitat: Damp or drying sites, often in rocky, moderately disturbed sites
Elevation: 2000–3500 m

Distribution

V20-1224-distribution-map.gif

Ariz., Colo., N.Mex., Tex., Mexico

Discussion

Senecio wootonii reaches its southern limit in Coahuila and Chihuahua, Mexico; farther south, it is replaced by S. toluccanus de Candolle, a similar, larger, more robust species.

Selected References

None.

Lower Taxa

None.
... more about "Senecio wootonii"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Theodore M. Barkley† +
Greene +
tapered +
9 cm90 mm <br />0.09 m <br /> (15 cm150 mm <br />0.15 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
obovate;lanceolate +
1.5cm;3cm +
winged;nerved;ribbed +
oblong;lance-linear +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, N.Mex. +, Tex. +  and Mexico +
2000–3500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Damp or drying sites, often in rocky, moderately disturbed sites +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrous +  and glaucous +
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 wavy +
2-carpellate +
persistent +
Flowering spring–summer. +
mostly oblong +  and lanceolate or linear +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Senecio anacletus +
Senecio wootonii +
species +
campanulate +
green +  and brownish +
denticulate +  and serrate or toothed +
45 cm450 mm <br />0.45 m <br /> (60 cm600 mm <br />0.6 m <br />) +
20 cm200 mm <br />0.2 m <br /> (45 cm450 mm <br />0.45 m <br />) +
shrub +  and subshrub +