Packera dimorphophylla var. paysonii

(T. M. Barkley) Trock & T. M. Barkley

Sida 18: 386. 1998.

Common names: Payson’s groundsel
Endemic
Basionym: Senecio dimorphophyllus var. paysonii T. M. Barkley Trans. Kansas Acad. Sci. 65: 362. 1963
Treatment appears in FNA Volume 20. Treatment on page 586. Mentioned on page 584.

Plants 10–35 cm. Stems 1 (lax), frequently 1–3 times branched. Basal leaves: petioles narrowly, if at all, winged, lengths 1–2 times blades; blades orbiculate to subreniform, 1–5+ × 1–4 cm, bases subcordate or abruptly contracted. Cauline leaves clasping; auriculate.


Phenology: Flowering early Jul–late Aug.
Habitat: Steep, rocky slopes, thin soils in alpine meadows
Elevation: 2700–3300 m

Discussion

Variety paysonii is known only from northwestern Wyoming, adjacent Montana and Idaho, and Elko County, Nevada. Its petioles are slender and their lengths are 1–2 times their blades.

Selected References

None.

Lower Taxa

None.

"-2timesblades" is not declared as a valid unit of measurement for this property.

not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
subumbelliform +, corymbiform +  and congested +
indeterminate +  and determinate +
Debra K. Trock +
(T. M. Barkley) Trock & T. M. Barkley +
subcordate +
Senecio dimorphophyllus var. paysonii +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
orbiculate;subreniform +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;nerved;ribbed +
Payson’s groundsel +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
pale-yellow +  and deep orange-red +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Idaho +, Mont. +, Nev. +  and Wyo. +
2700–3300 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Steep, rocky slopes, thin soils in alpine meadows +
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 +
crenate +  and entire +
2-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ebracteate +  and bracteate +
Flowering early Jul–late Aug. +
linear +  and ensiform +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
1-3 times branched +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Compositae +
Packera dimorphophylla var. paysonii +
Packera dimorphophylla +
variety +
campanulate +
serrate +  and denticulate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
23 +, 22 +  and 20 +