Packera porteri

(Greene) C. Jeffrey

Kew Bull. 47: 101. 1992.

Common names: Porter’s groundsel
Endemic
Basionym: Senecio porteri Greene Pittonia 3: 186. 1897,
Synonyms: Senecio aureus var. alpinus A. Gray
Treatment appears in FNA Volume 20. Treatment on page 596. Mentioned on page 571.

Perennials, 3–10+ cm; rhizomatous (rhizomes branched). Stems 1 (often cyanic), glabrous. Basal leaves (relatively turgid, abaxial faces cyanic) petiolate; blades reniform to subreniform, 5–15+ × 5–25+ mm, bases abruptly contracted to cordate, margins usually crenate, sometimes wavy. Cauline leaves abruptly reduced (1–4, sessile; bractlike, entire). Heads borne singly. Peduncles ebracteate, glabrous. Calyculi conspicuous (bractlets often cyanic). Phyllaries 13 or 21, deep red, 8–10+ mm, glabrous. Ray-florets 8 or 13; corolla laminae 8–10+ mm. Disc-florets 40–50+; corolla-tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. Cypselae 1.5–2.5 mm, glabrous; pappi 4–5.5 mm.


Phenology: Flowering mid Jul–mid Aug.
Habitat: Steep talus slopes in alpine habitats
Elevation: 2800–3900 m

Discussion

Multiple collections of Packera porteri are known from Colorado; single collections are known from Oregon (1899; collector indicated few plants were seen) and Washington (1996).

Selected References

None.

Lower Taxa

None.
... more about "Packera porteri"
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 +
(Greene) C. Jeffrey +
cordate +
Senecio porteri +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
reniform;subreniform +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
winged;nerved;ribbed +
Porter’s 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 +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Colo. +, Oreg. +  and Wash. +
2800–3900 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Steep talus slopes in alpine habitats +
discoid +  and radiate +
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 +
wavy +  and crenate +
2-carpellate +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
Flowering mid Jul–mid Aug. +
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 +
prostrate +  and ascending +
appendaged +  and truncate +
papillate +
Senecio aureus var. alpinus +
Packera porteri +
species +
campanulate +
serrate +  and denticulate +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +