Senecio pattersonensis

Hoover

Leafl. W. Bot. 5: 60. 1947.

EndemicConservation concern
Basionym: Senecio revolutus Hoover Leafl. W. Bot. 3: 256. 1943,
Treatment appears in FNA Volume 20. Treatment on page 564. Mentioned on page 548, 560.

Perennials, to 10 cm (rhizomes branching). Herbage (sometimes reddish-tinged, especially proximally) glabrous. Stems 1–3 (arching upward). Leaves evenly distributed (proximal often withering before flowering); obscurely petiolate or sessile; blades oblanceolate to lance-linear (sometimes with 1–2 lateral lobes), 2–4 cm × 3–5 mm, bases subdecurrent, weakly clasping, margins entire or wavy (often revolute). Heads 1 (–4). Calyculi of 3–5+ (inconspicuous) bractlets. Phyllaries ± 13, 5–7 (–8) mm. Ray-florets ± 8; corolla laminae 5–10 mm. Cypselae glabrous.


Phenology: Flowering summer.
Habitat: Talus slopes
Elevation: 3000–3700 m

Discussion

Of conservation concern.

Senecio pattersonensis has the aspect of a depauperate S. fremontii with notably narrow leaves. Some plants in collections appear to be intergrades with S. spartioides.

Selected References

None.

Lower Taxa

None.
... more about "Senecio pattersonensis"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Hoover +
subdecurrent +
decurrent +
Senecio revolutus +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
oblanceolate;lance-linear +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
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 +
Calif. +  and Nev. +
3000–3700 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Talus slopes +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
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 +
wavy +  and entire +
2-carpellate +
persistent +
Flowering summer. +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
mostly oblong +  and lanceolate or linear +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Leafl. W. Bot. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Endemic +  and Conservation concern +
1 +  and 3 +
appendaged +  and truncate +
papillate +
Compositae +
Senecio pattersonensis +
species +
campanulate +
denticulate +  and serrate or toothed +
0 cm0 mm <br />0 m <br /> (10 cm100 mm <br />0.1 m <br />) +
100 cm1,000 mm <br />1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
shrub +  and subshrub +