Senecio sheldonensis

A. E. Porsild

Canad. Field-Naturalist 64: 43. 1950.

Endemic
Treatment appears in FNA Volume 20. Treatment on page 567. Mentioned on page 549.

Perennials, 30–40 (–50) cm (caudices branched, fibrous-rooted). Herbage glabrous or with scattered hairs near leaf-bases and among heads. Stems single or loosely clustered. Leaves evenly distributed; petiolate or subsessile; blades lanceolate, 4–10 × 2–4 cm, bases ± tapered, margins denticulate (distal leaves sessile, smaller). Heads (1–) 3–5 (–6) in cymiform arrays. Calyculi of 3–7 bractlets (0.5–3 mm). Phyllaries ± 13, 7–10 mm, tips black (hairy). Ray-florets ± 8; corolla laminae ± 10 mm. Cypselae glabrous.


Phenology: Flowering late Jul–mid Aug.
Habitat: Subalpine meadows and valleys
Elevation: 1200–1800 m

Distribution

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B.C., N.W.T., Yukon.

Discussion

Senecio sheldonensis is infrequently collected and poorly understood. The treatment here is provisional.

Selected References

None.

Lower Taxa

None.
... more about "Senecio sheldonensis"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Theodore M. Barkley† +
A. E. Porsild +
tapered +
4 cm40 mm <br />0.04 m <br /> - 10 cm100 mm <br />0.1 m <br /> +
lanceolate +
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 +
10 cm100 mm <br />0.1 m <br /> - ? +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
B.C. +, N.W.T. +  and Yukon. +
1200–1800 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Subalpine meadows and valleys +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
with scattered hairs near leaf-bases and among heads +  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 +
subsessile +  and petiolate +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
denticulate +
2-carpellate +
persistent +
Flowering late Jul–mid Aug. +
mostly oblong +  and lanceolate or linear +
0.7 cm7 mm <br />0.007 m <br /> - 1 cm10 mm <br />0.01 m <br /> +
Canad. Field-Naturalist +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Compositae +
Senecio sheldonensis +
species +
campanulate +
denticulate +  and serrate or toothed +
40 cm400 mm <br />0.4 m <br /> - 50 cm500 mm <br />0.5 m <br /> +
30 cm300 mm <br />0.3 m <br /> - 40 cm400 mm <br />0.4 m <br /> +
100 cm1,000 mm <br />1 m <br /> - 250 cm2,500 mm <br />2.5 m <br /> +
shrub +  and subshrub +