yampahs

genus Perideridia

Member of carrot family (family Apiaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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

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gairdner’s yampah
Perideridia gairdneri

• roots tuberous
• basal petiole 8–15 cm
• cauline leaves 1–2-pinnate or 1–2-ternate [not ternate-pinnate?]

oregon yampah
Perideridia oregana

• roots tuberous
• basal petiole 2–10 cm
• all leaf segments alike in size and form

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2 observed taxons / 2 unobserved taxons / 1 key

Chris’s observations: 3 (1 is research grade)

Locations:

• Coal Creek OSP
• Edgewood Park & Natural Preserve
• Henry Coe SP

Months:

• May: 1
• Jun.: 0
• Jul.: 1
• Aug.: 0
• Sep.: 1

For more details, use advanced search.

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Not all sites include this taxon:

• genus Perideridia → iNaturalist – Calflora – Jepson eFlora
• not yet listed → FNA

Bay Area species: iNaturalist – Calflora