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cut-leaf butterweed, wide-head groundsel

Flett's groundsel, Flett's ragwort

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

1 or, usually, multiple, clustered, densely tomentose to glabrescent.

1 or 2–5 (often scapiform), loosely clustered, glabrous or leaf axils sparsely hairy.

Basal leaves

(soon withering), petiolate;

blades lyrate (lateral lobes 2–6+ pairs), ovate, obovate, or spatulate, 70–100+ × 20–30+ mm, bases tapering, ultimate margins irregularly and coarsely serrate-dentate.

(and proximal cauline) petiolate;

blades obovate to ovate or sublyrate, 30–60+ × 10–40+ mm, bases tapering, margins deeply dissected or pinnatifid, ultimate margins crenate to crenate-dentate.

Cauline leaves

gradually reduced (± petiolate, proximal and mid similar to basal, terminal lobes smaller than laterals; distal sessile, incised).

abruptly reduced or 0 (sessile; ovate to obovate, dissected or pinnatifid).

Peduncles

bracteate, sparsely to densely lanate-tomentose.

inconspicuously bracteate or ebracteate, glabrous.

Ray florets

8 or 13;

corolla laminae 10–15 mm.

5 or 8;

corolla laminae 5–10 mm.

Disc florets

35–50+;

corolla tubes 3.5–4.5 mm, limbs 2.5–3.5 mm.

20–30+;

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

Phyllaries

13 or 21, green (tips sometimes yellow), 8–10+ mm, densely tomentose proximally, glabrescent distally.

(8–)13, light green (tips yellowish), 4–7 mm, glabrous.

Calyculi

inconspicuous (bractlets tomentose).

0 or inconspicuous.

Heads

5–20+ in open or compact (rarely), cymiform arrays.

4–10+ in subumbelliform cymiform arrays.

Cypselae

1–1.5 mm, glabrous;

pappi 6–7 mm.

1–1.5 mm, glabrous;

pappi 4–4.5 mm.

2n

= 46.

= 40.

Packera eurycephala

Packera flettii

Phenology Flowering early Jul–mid Aug.
Habitat Exposed slopes, rocky or gravelly soils
Elevation 700–2000 m (2300–6600 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Packera flettii is known from the Olympic Mountains and near Mt. Rainer in Washington and coastal mountains of Clatsop County, Oregon. It has a chromosome number unique in the genus and is not known to hybridize with other species of Packera.

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

Key
1. Stems (1–)2–6; leaf blades: margins usually serrate-dentate, sometimes deeply dissected, midribs winged
var. eurycephala
1. Stems 1; leaf blades finely dissected, lateral lobes also dissected, midribs not or weakly winged
var. lewisrosei
Source FNA vol. 20, p. 586. 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. 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. tampicana, 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. 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
Subordinate taxa
P. eurycephala var. eurycephala, P. eurycephala var. lewisrosei
Synonyms Senecio eurycephalus Senecio flettii
Name authority (Torrey & A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) (Wiegand) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
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