Packera werneriifolia

(A. Gray) W. A. Weber & Á. Löve

Phytologia 49: 48. 1981.

Common names: Hoary groundsel
Endemic
Basionym: Senecio aureus var. werneriifolius A. Gray Proc. Acad. Nat. Sci. Philadelphia 15: 68. 1864 (as werneriaefolius)
Synonyms: Senecio alpicola Rydberg Senecio molinarius Greenman Senecio muirii Greenman Senecio perennans A. Nelson Senecio petraeus Klatt Senecio petrocallis Greene Senecio petrophilus Greene Senecio saxosus Klatt Senecio scaposus A. Nelson Senecio werneriifolius (A. Gray) A. Gray
Treatment appears in FNA Volume 20. Treatment on page 602. Mentioned on page 576, 581, 582, 591.

Perennials, 7–15+ cm; ± rhizomatous (rhizomes branched, sometimes densely crowded). Stems 1 or 3–5, clustered (often scapiform), usually floccose, lanate-tomentose, or canescent, sometimes glabrate. Basal leaves (either of two forms): usually (1) sessile, sometimes petiolate; blades narrowly lanceolate to elliptic, 15–40+ × 5–25 mm, bases tapering, margins entire or dentate toward apices (often revolute), sometimes (2) petiolate; blades ovate to orbiculate, 10–20 × 5–15 mm, bases tapering to abruptly contracted, margins entire or wavy, sometimes dentate toward apices. Cauline leaves abruptly reduced (bractlike). Heads 1–5 (–8) in cymiform to subumbelliform arrays. Peduncles inconspicuously bracteate, glabrous or densely hairy. Calyculi conspicuous (bractlets often cyanic). Phyllaries 13 or 21, green (tips sometimes cyanic), 4–10 mm, glabrous or hairy. Ray-florets 0, 8, or 13; corolla laminae 5–10 mm. Disc-florets 30–50+; corolla-tubes 2.5–3.5 mm, limbs 3–4 mm. Cypselae 1.5–2 mm, glabrous; pappi 5–6 mm. 2n = 44, 46.


Phenology: Flowering mid Jun–mid Aug.
Habitat: Rocky talus slopes, sandy soils in forest openings near or above timberline
Elevation: 2400–3700 m

Distribution

V20-1351-distribution-map.gif

Ariz., Calif., Colo., Idaho, Nev., N.Mex., Utah, Wyo.

Discussion

Packera werneriifolia is morphologically variable; it occurs throughout the central Rockies and, sporadically, as far west as the Sierra Nevada. Leaf morphology varies from ovate, elliptic, or narrowly elliptic in the Rockies to narrow with revolute margins in California and Arizona. All specimens are characteristically scapiform.

Selected References

None.

Lower Taxa

None.
... more about "Packera werneriifolia"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
cymiform +  and subumbelliform +
indeterminate +  and determinate +
Debra K. Trock +
(A. Gray) W. A. Weber & Á. Löve +
petiolate +  and sessile +
tapering +
Senecio aureus var. werneriifolius +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ovate;orbiculate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
winged;nerved;ribbed +
Hoary groundsel +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
pale-yellow +  and deep orange-red +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Colo. +, Idaho +, Nev. +, N.Mex. +, Utah +  and Wyo. +
2400–3700 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky talus slopes, sandy soils in forest openings near or above timberline +
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 +  and entire +
wavy +  and entire +
2-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
hairy +  and glabrous +
Flowering mid Jun–mid Aug. +
hairy +  and glabrous +
linear +  and ensiform +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
prostrate +  and ascending +
glabrate +, canescent +, lanate-tomentose +  and floccose +
3 +  and 5 +
appendaged +  and truncate +
papillate +
Senecio alpicola +, Senecio molinarius +, Senecio muirii +, Senecio perennans +, Senecio petraeus +, Senecio petrocallis +, Senecio petrophilus +, Senecio saxosus +, Senecio scaposus +  and Senecio werneriifolius +
Packera werneriifolia +
species +
campanulate +
serrate +  and denticulate +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +