american yellowrocket

Barbarea orthoceras

Member of wintercresses (genus Barbarea)
mustard family (family Brassicaceae)
dicots (class Magnoliopsida)
yellow in flowering plants

petals 5–7 mm (including claw), bright yellow
sepals 2.5–3.5 mm
stigma barely above anthers
cauline leaves pinnately lobed, strongly at the base
basal lobes of distal leaves generally with 1–many hairs [but not visible in CalPhotos]
common

Toxicity of wintercress (Barbarea spp.):
0 – Non-toxic.

Chris’s observations: 18 (3 are research grade)

Locations:

Henry Coe SP: 3
Sweeney Ridge National Recreation Area: 3
Edgewood County Park & Natural Preserve: 2
Waterdog Lake & Open Space: 2
Almaden Quicksilver CP
Alpine Rd.
Castle Rock SP
Coal Creek OSP
Coyote Valley OSP
El Corte de Madera OSP
Joseph D. Grant CP
Purisima Creek Redwoods OSP

Months:

Feb.: 2
Mar.: 5
Apr.: 8
May: 1
Jun.: 1
Jul.: 1

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Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora