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Great Plains ragwort

Fendler's ragwort, notchleaf groundsel

Habit Annuals, 20–50+ cm; taprooted (caudices ascending to erect). Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched).
Stems

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

1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent.

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.

petiolate;

blades lanceolate to oblanceolate, 30–60+ × 10–30+ mm, bases tapering, margins shallowly, evenly pinnatifid to pinnatisect or wavy (adaxial faces floccose-tomentose or subglabrescent).

Cauline leaves

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

gradually reduced (sessile; lanceolate to oblanceolate, pinnatisect to wavy).

Peduncles

bracteate, glabrous.

bracteate, densely to irregularly floccose.

Ray florets

8 or 13;

corolla laminae 3–7 mm.

6–8+;

corolla laminae 5–7 mm.

Disc florets

30–45(–100+);

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

30–40+;

corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm.

Phyllaries

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

13, green, 5–7 mm, floccose proximally to glabrescent distally.

Calyculi

inconspicuous or 0.

0 or inconspicuous (bractlets red-tinged).

Heads

4–25+ in corymbiform arrays.

6–25+ in open or compact, corymbiform arrays.

Cypselae

1–1.5 mm, hirtellous on ribs;

pappi 3–5 mm.

2.5–3 mm, glabrous;

pappi 4–5 mm.

2n

= 46.

= 46.

Packera tampicana

Packera fendleri

Phenology Flowering Feb–Jun. Flowering late May–early Oct.
Habitat Disturbed, wet, sandy or clay sites, roadsides, stream banks, waste areas Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites
Elevation 0–1000 m (0–3300 ft) 1600–3200 m (5200–10500 ft)
Distribution
from FNA
AR; KS; LA; OK; TX; Mexico
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[BONAP county map]
from FNA
CO; NM; WY
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[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.)

Packera fendleri is abundant, almost weedy in the southern Rocky Mountains. It thrives in a wide range of elevations and in a wide variety of habitats; flowering times vary. It frequently grows in close association with other species of Packera and may hybridize with them.

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

Source FNA vol. 20, p. 600. FNA vol. 20, p. 587.
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. 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. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio tampicanus, Senecio greggii, Senecio imparipinnatus Senecio fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus
Name authority (de Candolle) C. Jeffrey: Kew Bull. 47: 101. (1992) (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
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