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Bolander's groundsel, Bolander's ragwort

burnet ragwort

Habit Perennials, 20–50+ cm; fibrous-rooted (caudices creeping). Perennials or biennials, 30–50+ cm; ± fibrous-rooted (bases creeping, ascending to erect).
Stems

1 or 2–3, loosely clustered, glabrous.

1 or 2–3, clustered, glabrous or leaf axils tomentose.

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 broadly oblanceolate (pinnately lobed, lateral lobes 2–3+ pairs, their bases petioluliform, terminal lobes larger than laterals, ovate to reniform, midribs not winged), 60–120+ × 20–60 mm, bases contracted, ultimate margins crenate to crenate-dentate.

Cauline leaves

gradually reduced (petiolate or sessile and clasping; lanceolate, incised).

gradually reduced (petiolate or sessile; lyrate to sublyrate, midribs winged, terminal lobes weakly distinct, shallowly dentate).

Peduncles

ebracteate or inconspicuously bracteate, glabrous.

inconspicuously bracteate, glabrous or tomentose proximally.

Ray florets

8 or 13;

corolla laminae 10–15+ mm.

8;

corolla laminae 6–12 mm.

Disc florets

30–45+;

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

35–50+;

corolla tubes 2.5–3.5 mm, limbs 2–3 mm.

Phyllaries

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

13, bright green (tips light green to yellow), 4–7 mm, glabrous.

Calyculi

conspicuous.

inconspicuous.

Heads

8–15+ in corymbiform or subumbelliform arrays.

3–8+ in subumbelliform or compound, cymiform arrays (of 2–4+ cymiform clusters of 2–5+ heads each).

Cypselae

2.5–3.5 mm, glabrous;

pappi 5–7 mm.

1.5–2 mm, glabrous;

pappi 4.5–5.5 mm.

2n

= 46.

= 46.

Packera bolanderi

Packera sanguisorboides

Phenology Flowering late Jul–mid Sep.
Habitat Damp, open meadows, spruce-aspen forests
Elevation 2700–3700 m [8900–12100 ft]
Distribution
from FNA
CA; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
NM
[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 sanguisorboides is known from the San Juan and Sangre de Cristo mountains of northern New Mexico, the Magdalena Mountains of western New Mexico, and the Sacramento Mountains of southern Lincoln and Otero counties. It may have affinities with P. coahuilensis Greenman.

(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. 598.
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. 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. 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 sanguisorboides
Name authority (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981)
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