Packera greenei

(A. Gray) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Flame ragwort
EndemicConservation concern
Basionym: Senecio greenei A. Gray Proc. Amer. Acad. Arts 10: 75. 1874
Treatment appears in FNA Volume 20. Treatment on page 588. Mentioned on page 577.

Perennials, 20–30+ cm; rhizomatous (rhizomes horizontal to erect, not branched), sometimes stoloniferous. Stems 1, irregularly lanate or tomentose. Basal leaves (and proximal cauline) petiolate; blades orbiculate, ovate, oblanceolate, or rhombic, 20–50+ × 20–40+ mm, bases tapering, sometimes obtuse, margins coarsely dentate to crenate-dentate. Cauline leaves gradually to abruptly reduced (petioles broad-winged, clasping, blades obovate, bases tapering, margins irregularly dentate; distal sessile, linear to lanceolate, entire). Heads 1–3+. Peduncles bracteate, lanate or tomentose distally. Calyculi conspicuous. Phyllaries 21, green (tips sometimes deep red), 8–10+ mm, densely tomentose proximally, sparsely tomentose distally. Ray-florets 8–10 (–13); corolla laminae (red-orange) 8–15+ mm. Disc-florets 35–65+; corolla-tubes 4–5 mm, limbs 5–6 mm. Cypselae 1.5–2.5 mm, glabrous; pappi 8–11 mm. 2n = 40, 46, 92.


Phenology: Flowering mid May–early Jul.
Habitat: Dry, rocky, usually serpentine soils, open scrub-pine associations
Elevation: 100–1600 m

Discussion

Of conservation concern.

Packera greenei is known from Coast Ranges of northern California. It has relatively large heads and bright orange-red ray corollas; its leaves are usually cyanic abaxially.

Selected References

None.

Lower Taxa

None.
... more about "Packera greenei"
92 +, 46 +  and 40 +
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
congested +  and open corymbiform cymiform or subumbelliform +
indeterminate +  and determinate +
Debra K. Trock +
(A. Gray) W. A. Weber & Á. Löve +
obtuse +  and tapering +
Senecio greenei +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
rhombic;oblanceolate;rhombic;oblanceolate;ovate;orbiculate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;nerved;ribbed +
Flame ragwort +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pale-yellow +  and deep orange-red +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
100–1600 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, rocky, usually serpentine soils, open scrub-pine associations +
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 +
coarsely dentate +  and crenate-dentate +
2-carpellate +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
tomentose +  and lanate +
Flowering mid May–early Jul. +
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 +
tomentose +  and lanate +
appendaged +  and truncate +
papillate +
Compositae +
Packera greenei +
species +
campanulate +
serrate +  and denticulate +
stoloniferous +  and rhizomatous +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +