Packera eurycephala var. lewisrosei

(J. T. Howell) J. F. Bain

Novon 9: 457. 1999.

Common names: Lewis’s groundsel
EndemicConservation concern
Basionym: Senecio lewisrosei J. T. Howell Leafl. W. Bot. 3: 141. 1942
Synonyms: Senecio eurycephalus var. lewisrosei (J. T. Howell) T. M. Barkley
Treatment appears in FNA Volume 20. Treatment on page 586.

Caudices subligneous, bases spreading and branched. Stems 1, tomentose or glabrate. Leaf-blades: margins finely dissected, lateral lobes also dissected, midribs not or weakly winged.


Phenology: Flowering mid Apr–mid Jun.
Habitat: On serpentine-derived soils, rocky slopes
Elevation: 100–1500 m

Discussion

Of conservation concern.

Variety lewisrosei is found only near the Feather River and its tributaries in Butte and Plumas counties. The finely dissected leaf lobing is similar to that of the eastern species Packera millefolia.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
cymiform +, compact +  and open +
indeterminate +  and determinate +
Debra K. Trock +
(J. T. Howell) J. F. Bain +
tapering +
Senecio lewisrosei +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
spatulate;obovate;spatulate;obovate;ovate;lyrate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
winged;nerved;ribbed +
inconspicuous +
subligneous +
Lewis’s groundsel +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
pale-yellow +  and deep orange-red +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
100–1500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
On serpentine-derived soils, rocky slopes +
discoid +  and radiate +
in compact or congested to open corymbiform cymiform or subumbelliform , , , arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;cylindric +
sessile +  and petiolate +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
dissected +
2-carpellate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
lanate-tomentose +
Flowering mid Apr–mid Jun. +
glabrescent +  and tomentose +
linear +  and ensiform +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
Endemic +  and Conservation concern +
prostrate +  and ascending +
glabrate +  and tomentose +
appendaged +  and truncate +
papillate +
Senecio eurycephalus var. lewisrosei +
Packera eurycephala var. lewisrosei +
Packera eurycephala +
variety +
campanulate +
serrate +  and denticulate +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +