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.

kellogg’s yampah
Perideridia kelloggii

kellogg’s yampah
Perideridia kelloggii

roots fibrous or ± thickened
basal petiole 3–6 cm, generally fully sheathing
cauline leaves 1-ternate-pinnate

california yampah
Perideridia californica

california yampah
Perideridia californica

roots tuberous
basal petiole 2–6 cm
terminal leaf segments unlike lateral segments in size and form

gairdner’s yampah
Perideridia gairdneri

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

3 observed taxons / 1 unobserved taxon / 1 key

Chris’s observations: 4 (2 are research grade)

Locations:

Coal Creek OSP
Edgewood County Park & Natural Preserve
Henry Coe SP
Lassen Volcanic NP

Months:

May: 1
Jun.: 0
Jul.: 2
Aug.: 0
Sep.: 1

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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