Flora of North America species comparison

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Packera breweri

Brewer's ragwort
Habit Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout).
Stems

1, glabrous or leaf axils tomentose.
Basal leaves

(and proximal cauline) petiolate;

blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous).
Cauline leaves

gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow).
Peduncles

usually ebracteate (rarely with 1–2 bractlets), glabrous.
Ray florets

8–10+;

corolla laminae 10–15+ mm.
Disc florets

45–60+;

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

13 or 21, green, 7–9+ mm, glabrous.
Calyculi

inconspicuous.
Heads

15–50+ in corymbiform arrays.
Cypselae

2–2.5 mm, glabrous;

pappi 6–7 mm.
2n

= 46.

Packera breweri
Phenology Flowering mid Apr–late May.
Habitat Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas
Elevation 200–1500 m (700–4900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Packera breweri is known only from Coast Ranges from San Francisco Bay to Los Angeles County and along the eastern edges of the San Joaquin Valley. Populations are relatively small and sporadic; the plants appear not to hybridize with other species of Packera.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 580.
Parent taxa Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, 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
Synonyms Senecio breweri
Name authority (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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