american groundsels and ragworts

genus Packera

Member of groundsels and allies (tribe Senecioneae)
yellow daisies
sunflower family (family Asteraceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild species of this genus in the bay area.

Jepson doesn’t describe well how to distinguish these.

brewer’s ragwort
Packera breweri

brewer’s ragwort
Packera breweri

generally 1 stem
glabrous or sparsely hairy when young
15–50+ heads
green phyllary tips
phyllaries glabrous

widehead groundsel
Packera eurycephala var. eurycephala

1 or several clustered stems
glabrous or densely tomentose
5–30+ heads
phyllary tips sometimes yellow
phyllaries densely tomentose proximally (not reliably shown in in CalPhotos)

Although iNaturalist has a few observations of other species in the bay area, none of them are research grade.

1 observed taxon / 1 unobserved taxon / 1 key

Chris’s observations: 3 (all are research grade)

Locations:

Calero CP: 2
Hidden Villa, Los Altos Hills

Months:

Apr.: 1
May: 2

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora