Packera hartiana

(A. Heller) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Hart’s ragwort
Endemic
Basionym: Senecio hartianus A. Heller Bull. Torrey Bot. Club 26: 622. 1899
Synonyms: Packera quaerens (Greene) W. A. Weber & Á. Löve S. prionophyllus Greene S. quaerens Greene.
Treatment appears in FNA Volume 20. Treatment on page 589. Mentioned on page 573.

Perennials, 40–70 cm; fibrous-rooted, sometimes stoloniferous (caudices ascending). Stems 1 or 2–3, clustered, bases and leaf-axils usually loosely floccose-tomentose, sometimes glabrate. Basal leaves petiolate; blades ovate to obovate or suborbiculate, 30–80 × 20–40+ mm, bases tapering, sometimes obtuse or contracted, margins serrate-dentate to weakly crenate (abaxial faces sometimes hairy). Cauline leaves gradually reduced (petiolate, often sublyrate, sometimes weakly pinnatisect; mids and distals sessile, pinnatisect to subentire). Heads 3–9+ in open, corymbiform arrays. Peduncles bracteate, loosely tomentose or glabrescent. Calyculi 0. Phyllaries (13–) 21, green, 5–7 mm, glabrous or sparsely tomentose. Ray-florets 8 or 13; corolla laminae 5–8 mm. Disc-florets 50–65+; corolla-tubes 2–4 mm, limbs 2.5–3.5 mm. Cypselae 1–2 mm, glabrous; pappi 3.5–4.5 mm. 2n = 44.


Phenology: Flowering mid May–early Jul.
Habitat: Meadows or open areas, woodlands, along streams
Elevation: 1600–2600 m

Discussion

Packera hartiana resembles both P. paupercula and P. plattensis; it is separated from both on the basis of geography and morphologic characters. New Mexico populations were formerly treated as P. quaerens; the morphologic characters used to separate the two entities vary and overlap.

Selected References

None.

Lower Taxa

None.
... more about "Packera hartiana"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and open +
indeterminate +  and determinate +
Debra K. Trock +
(A. Heller) W. A. Weber & Á. Löve +
glabrate +  and floccose-tomentose +
obtuse +  and tapering +
Senecio hartianus +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
ovate;obovate or suborbiculate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;nerved;ribbed +
Hart’s ragwort +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pale-yellow +  and deep orange-red +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +  and Tex. +
1600–2600 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Meadows or open areas, woodlands, along streams +
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 +
glabrate +  and floccose-tomentose +
sessile +  and petiolate +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
serrate-dentate +  and weakly crenate +
2-carpellate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
glabrescent +  and tomentose +
Flowering mid May–early Jul. +
tomentose +  and glabrous +
linear +  and ensiform +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
prostrate +  and ascending +
2 +  and 3 +
appendaged +  and truncate +
papillate +
Packera quaerens +, S. prionophyllus +  and S. quaerens +
Packera hartiana +
species +
campanulate +
serrate +  and denticulate +
stoloniferous +  and fibrous-rooted +
40 cm400 mm <br />0.4 m <br /> (70 cm700 mm <br />0.7 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +