Packera pauciflora

(Pursh) Á. Löve & D. Löve

Bot. Not. 128: 520. 1976.

Common names: Alpine groundsel
Endemic
Basionym: Senecio pauciflorus Pursh Fl. Amer. Sept. 2: 529. 1813
Synonyms: Senecio aureus var. discoideus Hooker Senecio discoideus (Hooker) Britton Senecio lembertii Greene
Treatment appears in FNA Volume 20. Treatment on page 595. Mentioned on page 572, 590.
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Perennials, 20–40+ cm; fibrous-rooted (caudices weakly spreading, horizontal to erect). Stems 1 or 2–3, clustered, glabrous or glabrate. Basal leaves (relatively thick and turgid) petiolate; blades elliptic-ovate, ovate, or subreniform, 20–40+ × 10–30+ mm, bases tapering to subcordate, margins dentate to crenate (proximal cauline leaves petiolate; margins dissected to pinnatifid). Cauline leaves gradually reduced (sessile, subentire). Heads 1–6+ in open to compact, subumbelliform arrays. Peduncles bracteate (bractlets cyanic or reddish), glabrous or sparsely tomentose distally. Calyculi conspicuous (bractlets deep red or at least apices deep red to purple). Phyllaries 13 or 21, deep red or green (then tips deep red to purple), 7–10 mm, glabrous. Ray-florets 0 or 8–13; corolla laminae (deep orange-yellow) 5–7 mm. Disc-florets 60–80+; corolla-tubes 1.5–2.5 mm, limbs 2.5–3.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 3–4.5 mm. 2n = 46, 130+.


Phenology: Flowering early Jul–late Aug.
Habitat: Damp meadows or woods, subalpine to alpine in west, lower in east
Elevation: 0–2700 m

Distribution

V20-1331-distribution-map.gif

Alta., B.C., Nfld. and Labr., N.W.T., Ont., Que., Yukon, Alaska, Calif., Wash., Wyo.

Discussion

Heads of Packera pauciflora are usually discoid. Its range and habitat overlap those of P. indecora; the two can be difficult to distinguish. Disjunction from principal distribution to Sierra Nevada of California is 1200 km.

Selected References

None.

Lower Taxa

None.
... more about "Packera pauciflora"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
subumbelliform +, open +  and compact +
indeterminate +  and determinate +
Debra K. Trock +
(Pursh) Á. Löve & D. Löve +
tapering +  and subcordate +
Senecio pauciflorus +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
subreniform;ovate;subreniform;ovate;elliptic-ovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
winged;nerved;ribbed +
Alpine groundsel +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
pale-yellow +  and deep orange-red +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Nfld. and Labr. +, N.W.T. +, Ont. +, Que. +, Yukon +, Alaska +, Calif. +, Wash. +  and Wyo. +
0–2700 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Damp meadows or woods, subalpine to alpine in west, lower in east +
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 +
dentate +  and crenate +
2-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
tomentose +  and glabrous +
Flowering early Jul–late Aug. +
list +  and count +
linear +  and ensiform +
0.7 cm7 mm <br />0.007 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 +  and glabrous +
2 +  and 3 +
appendaged +  and truncate +
papillate +
Senecio aureus var. discoideus +, Senecio discoideus +  and Senecio lembertii +
Packera pauciflora +
species +
campanulate +
serrate +  and denticulate +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +