Senecio erucifolius

Linnaeus

Fl. Suec. ed. 2, 291. 1755.

Introduced
Synonyms: Jacobaea erucifolia (Linnaeus) Gaertner
Treatment appears in FNA Volume 20. Treatment on page 569. Mentioned on page 546, 570.

Perennials, 30–120 cm (rhizomes branched, sometimes producing stolons). Herbage floccose-tomentose, unevenly glabrescent (persistently hairy on abaxial leaf faces). Stems usually single, sometimes loosely clustered. Leaves ± evenly distributed (basal and proximal sometimes withering before flowering); petiolate (proximal) or sessile; blades ovoid or oblong to spatulate (usually pinnatifid to pinnatisect, lobes ± lanceolate to linear), (3–) 5–12 × (1.5–) 2–4 cm, bases tapered to ± truncate, ultimate margins (often revolute) dentate or entire. Heads 20–60 in corymbiform arrays. Calyculi of 4–6 (–10) bractlets (lengths to 1/2 phyllaries). Phyllaries ± 13, 5–7 mm, tips green or greenish. Ray-florets ± 13; corolla laminae 12–15 mm. Cypselae hairy.


Phenology: Flowering summer.
Habitat: Waste grounds
Elevation: 0–200+ m

Distribution

V20-1281-distribution-map.gif

Introduced; Pa., Old World

Discussion

Senecio erucifolius has been introduced occasionally around seaports and has persisted. At present, it appears to be uncommon and highly localized; it should be expected almost any place that its close relative, Senecio jacobaea, occurs.

Senecio erucifolius was treated in Jacobaea by E. Wiebe (2000); see discussion under 53. S. jacobaea.

Selected References

None.

Lower Taxa

None.
... more about "Senecio erucifolius"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Theodore M. Barkley† +
Linnaeus +
tapered +  and more or less truncate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
oblong;spatulate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Pa. +  and Old World +
0–200+ m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Waste grounds +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrescent +  and floccose-tomentose +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
sessile +  and petiolate +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
2-carpellate +
persistent +
Flowering 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 />) +
Fl. Suec. ed. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Introduced +
appendaged +  and truncate +
papillate +
Jacobaea erucifolia +
Senecio erucifolius +
species +
campanulate +
greenish +  and green +
denticulate +  and serrate or toothed +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
100 cm1,000 mm <br />1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
shrub +  and subshrub +