Senecio spartioides

Torrey & A. Gray

Fl. N. Amer. 2: 438. 1843.

Endemic
Synonyms: Senecio andersonii Clokey Senecio incurvus A. Nelson Senecio multicapitatus Greenman Senecio serra var. sanctus H. M. Hall Senecio spartioides var. granularis Maguire & A. H. Holmgren ex Cronquist Senecio toiyabensis
Treatment appears in FNA Volume 20. Treatment on page 559. Mentioned on page 548, 560, 564, 566.

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: Flowering summer–fall.
Habitat: Open, dry disturbed sites, especially stream banks and hillsides
Elevation: 1000–3500 m

Distribution

V20-1243-distribution-map.gif

Ariz., Calif., Colo., Nebr., Nev., N.Mex., S.Dak., Tex., Utah, 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.

Selected References

None.

Lower Taxa

None.
... more about "Senecio spartioides"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and compound +
indeterminate +  and determinate +
Theodore M. Barkley† +
Torrey & A. Gray +
decurrent +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
narrowly linear;filiform +
1mm;6mm +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
glabrous +  and hirtellous +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Nebr. +, Nev. +, N.Mex. +, S.Dak. +, Tex. +, Utah +  and Wyo. +
1000–3500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, dry disturbed sites, especially stream banks and hillsides +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
hairy +  and glabrous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
petiolate +  and sessile +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
2-carpellate +
persistent +
Flowering summer–fall. +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
mostly oblong +  and lanceolate or linear +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Senecio andersonii +, Senecio incurvus +, Senecio multicapitatus +, Senecio serra var. sanctus +, Senecio spartioides var. granularis +  and Senecio toiyabensis +
Senecio spartioides +
species +
campanulate +
black +  and green +
denticulate +  and serrate or toothed +
perennial +, biennial +  and annual +