E-Flora BC: Electronic Atlas of the Flora of British Columbia

Perideridia gairdneri (Hook. & Arn.) Mathias
Gairdner's yampah
Apiaceae

Introduction to Vascular Plants

Distribution of Perideridia gairdneri
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Species Information

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Illustration Source: The Illustrated Flora of British Columbia

General:
Slender perennial herb from tuberous-thickened and often clustered edible root, often fascicled, glabrous; stems solitary, 0.4-1.2 m tall.

Leaves:
Several, well distributed along stem, divided 1-3 times, elongate; basal leaf sheaths not much inflated; ultimate segments long and narrow.

Flowers:
Inflorescence of compound umbels; flowers terminal and lateral; spokes up to 6 cm long at maturity; flowers white or pink; involucel bractlets bristly or obsolete.

Fruits:
Roundish, 2-3 mm long and wide, slightly flattened, glabrous, prominent ribs.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
White

Blooming Period:
Mid Spring

Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer

Source: The USDA

Habitat / Range

Moist to dry meadows and woodlands in the lowland and montane zones; infrequent in SE and SW BC (known from SE Vancouver Island and the Gulf Islands), also rare in SC BC; E to SK and S to SD, CO, NM and CA.

Source: The Illustrated Flora of British Columbia

Ecological Indicator Information

A very shade-intolerant, submontane to montane. North American forb distributed equally in the Pacific, Cordilleran, and Atlantic regions. Occurs in maritime to submaritime summer-dry cool mesothermal climates on moderately dry to fresh, nitrogen-medium soils; its occurrence increases with increasing temperature and decreases with increasing precipitation. Scattered in forest openings and non-forested communities on water-shedding sites. Characteristic of moisture-deficient sites.

Source: Indicator Plants of Coastal British Columbia (Information applies to coastal locations only)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is cool mesothermal.

Status Information

Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Unlisted	Unlisted	Unlisted	Unlisted

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Taxonomic and Nomenclatural Links

Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer
USDA

Additional Photo Sources

UBC Herbarium Scanned Collection Record
Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2024-05-18 2:59:34 AM ]

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