Index / Search / Perideridia gairdneri

§1 Plant

Perideridia gairdneri (Hook. & Arn.) Mathias

vernacular Gardner's yampah — species · Apiaceae

USDA: PEGA3
GBIF: 3034543
Rank: species

Gardner's yampah (Perideridia gairdneri) — Platephotograph · Kristin CurrinCC BY-NC source · iNaturalist ↗

§2Habit & range

Growth habit: Forb/herb
Duration: Perennial
Group: Dicot
Family: Apiaceae Lindl.
Genus: Perideridia

§2a

Native status, by region

CAN Canada Native
L48 Lower 48 States Native

§2b

County-level range

· 168 counties across 10 states/territories

Legend Native · 168 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: Low
Shade: Low
Moisture use: High
Fire: Medium
Salinity: None
Anaerobic: Low
CaCO₃: Low
Hedging: None

§3b

Climate & soil

Cold tolerance: -18 °F minimum
Frost-free days: 140 min.
Precipitation: 14–24 in/yr
pH range: 6–7.5
Root depth: 12 in min.
Fertility need: Medium
Soil texture: medium, fine

§3c

Form & growth

Growth form: Single Crown
Growth rate: Moderate
Lifespan: Moderate
Mature height: 4 ft
Foliage texture: Fine
Foliage colour: Green
Porosity (summer): Porous
Porosity (winter): Porous
Flower colour: White
Fruit colour: Brown
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Bloom period: Mid Spring
Seed abundance: Medium
Seed begins: Spring
Seed ends: Summer
Spread rate: Slow
Stratify: No
Seeds / lb: 400,000
Propagation: seed

§3e

Use & availability

Commercial availability: No Known Source
Nursery stock: No
Palatable, human: Yes
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 168 counties across 10 states/territories.

California view state ↗ 27 N ▾

Colorado view state ↗ 3 N ▾

Idaho view state ↗ 28 N ▾

Montana view state ↗ 23 N ▾

Nevada view state ↗ 2 N ▾

Oregon view state ↗ 32 N ▾

South Dakota view state ↗ 2 N ▾

Utah view state ↗ 11 N ▾

Washington view state ↗ 23 N ▾

Wyoming view state ↗ 17 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/PEGA3 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/3034543 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T20:46:58Z