watercress

Nasturtium officinale

Member of water-cresses (genus Nasturtium)
mustard family (family Brassicaceae)
dicots (class Magnoliopsida)
white in flowering plants

Except for historical records that I'm ignoring, there are no other wild species of this genus in the bay area.

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See also sweet alyssum (Lobularia maritima), which has petals that overlap less.

Note that garden nasturtium (Tropaeolum majus) is completely unrelated.

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

Locations:

• Coyote Lake / Harvey Bear Ranch CP
• Sierra Vista OSP
• Stevens Creek CP

Months:

• May: 1
• Jun.: 1
• Jul.: 1

For more details, use advanced search.

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

Bay Area species: iNaturalist – Calflora