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Great Plains ragwort

Piedmont ragwort

Habit Annuals, 20–50+ cm; taprooted (caudices ascending to erect). Perennials, 25–60+ cm; fibrous-rooted (caudices branched).
Stems

1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.

1 or 2–3, clustered, glabrous or leaf axils sparsely hairy.

Basal leaves

(and proximal cauline) petiolate;

blades oblanceolate to spatulate (usually pinnately lobed, lateral lobes 1–6+ pairs, their bases petioluliform, terminal lobes usually larger than laterals, often reniform to ± orbiculate, midribs sometimes ± winged and/or toothed between the primary lobes), 40–120+ × 10–30+ mm, bases ± cuneate, ultimate margins subentire or irregularly crenate, dentate, or lobed.

(and proximal cauline) petiolate;

blades narrowly ovate to ovate (2–3 times pinnately dissected, ultimate lobes mostly linear to filiform), 50–80 × 30–50 mm, bases ± truncate or auriculate, ultimate margins entire or remotely dentate.

Cauline leaves

gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).

gradually reduced (petiolate or sessile, similar to basals).

Peduncles

bracteate, glabrous.

bracteate or ebracteate, glabrous.

Ray florets

8 or 13;

corolla laminae 3–7 mm.

8–10(–13);

corolla laminae 8–12 mm.

Disc florets

30–45(–100+);

corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.

35–50+;

corolla tubes 2–3 mm, limbs 1.5–2.5 mm.

Phyllaries

13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.

(13–)21, green, 4–6 mm, glabrous (tips sometimes hair-tufted).

Calyculi

inconspicuous or 0.

0.

Heads

4–25+ in corymbiform arrays.

10–30+ in open, corymbiform arrays.

Cypselae

1–1.5 mm, hirtellous on ribs;

pappi 3–5 mm.

0.75–1.5 mm, hairy on ribs;

pappi 3–4 mm.

2n

= 46.

Packera tampicana

Packera millefolium

Phenology Flowering Feb–Jun. Flowering early May–mid Jun.
Habitat Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas Open areas along streams, rock outcrops in thin, granitic-derived soils
Elevation 0–1000 m (0–3300 ft) 400–900 m (1300–3000 ft)
Distribution
from FNA
AR; KS; LA; OK; TX; Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
GA; NC; SC; VA
[BONAP county map]
Discussion

Packera tampicana is fairly widespread along the Gulf Coastal Plain and north and in Mexico. Morphologically, P. tampicana most closely resembles P. glabella; the former grows in very wet, sandy or clay soils and open sunlight, the latter grows in drier habitats, usually in partial shade.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

Packera millefolia is known only from granitic soils in the southern Appalachians. It is similar in overall aspect to the widespread P. anonyma; it differs by its 2–3 times pinnately dissected leaves.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 600. FNA vol. 20, p. 591.
Parent taxa Asteraceae > tribe Senecioneae > Packera Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio tampicanus, Senecio greggii, Senecio imparipinnatus Senecio millefolium, Senecio memmingeri
Name authority (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) (Torrey & A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981)
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