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Bolander's groundsel, Bolander's ragwort

Flett's groundsel, Flett's ragwort

Habit Perennials, 20–50+ cm; fibrous-rooted (caudices creeping). Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to erect).
Stems

1 or 2–3, loosely clustered, glabrous.

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

Basal leaves

(and proximal cauline) petiolate;

blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised.

(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 or sessile and clasping; lanceolate, incised).

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

Peduncles

ebracteate or inconspicuously bracteate, glabrous.

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

30–45+;

corolla tubes 3–4 mm, limbs 3.5–4.5 mm.

20–30+;

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

Phyllaries

(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.

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

Calyculi

conspicuous.

0 or inconspicuous.

Heads

8–15+ in corymbiform or subumbelliform arrays.

4–10+ in subumbelliform cymiform arrays.

Cypselae

2.5–3.5 mm, glabrous;

pappi 5–7 mm.

1–1.5 mm, glabrous;

pappi 4–4.5 mm.

2n

= 46.

= 40.

Packera bolanderi

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; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties.

(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. Basal leaves (relatively thick and turgid); phyllaries 13 or 21, 6–8+ mm, hairy proximally (hairs tan or brownish, multicelled)
var. bolanderi
1. Basal leaves (relatively thin); phyllaries 8, 13, (or 21), 5–6 mm, glabrous
var. harfordii
Source FNA vol. 20, p. 579. 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. 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. 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. bolanderi var. bolanderi, P. bolanderi var. harfordii
Synonyms Senecio bolanderi Senecio flettii
Name authority (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) (Wiegand) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
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