Packera ganderi

(T. M. Barkley & R. M. Beauchamp) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Gander’s ragwort
EndemicConservation concern
Basionym: Senecio ganderi T. M. Barkley & R. M. Beauchamp Brittonia 26: 106, fig. 1. 1974
Treatment appears in FNA Volume 20. Treatment on page 588. Mentioned on page 572.

Perennials, 30–80+ cm; fibrous-rooted (bases weakly spreading). Stems 1, glabrous or bases hairy. Basal leaves (and proximal cauline, relatively turgid or leathery) petiolate; blades reniform to suborbiculate, 40–70+ × 40–80+ mm, bases truncate to cordate, margins dentate or shallowly lobed. Cauline leaves abruptly reduced (petiolate or sessile, oblanceolate, pinnatifid; distal sessile, bractlike). Heads 3–6+ in compact, cymiform arrays. Peduncles ebracteate (or bractlets 1–2), glabrous. Calyculi 0 or inconspicuous. Phyllaries (13–) 21, dark green with yellow margins, 8–11+ mm, glabrous. Ray-florets 13 or 21; corolla laminae 10–12+ mm. Disc-florets 40–60+; corolla-tubes 3–4 mm, limbs 2.5–3.5 mm. Cypselae 5–6 mm, glabrous; pappi 5–7 mm.


Phenology: Flowering mid Apr–late May.
Habitat: Recently burned chaparral on mountain slopes, gabbroic soils
Elevation: 700–1100 m

Discussion

Of conservation concern.

Packera ganderi is known only from the mountain ranges of San Diego County, where it has been collected from three sites.

Selected References

None.

Lower Taxa

None.
... more about "Packera ganderi"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Debra K. Trock +
(T. M. Barkley & R. M. Beauchamp) W. A. Weber & Á. Löve +
truncate +  and cordate +
Senecio ganderi +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
reniform;suborbiculate +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
winged;nerved;ribbed +
inconspicuous +
Gander’s ragwort +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pale-yellow +  and deep orange-red +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
700–1100 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Recently burned chaparral on mountain slopes, gabbroic soils +
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 +
lobed +  and dentate +
2-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering mid Apr–late May. +
linear +  and ensiform +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
Endemic +  and Conservation concern +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Compositae +
Packera ganderi +
species +
campanulate +
serrate +  and denticulate +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +