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

Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose
large-fruited desert-parsley (bigseed biscuitroot)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #85852)

E-Flora BC Static Map
Distribution of Lomatium macrocarpum
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Species Information

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Stout perennial herb from an elongated, thickened taproot or necklace-like or tuberous base, capped by a simple, often subterranean root-crown; stem branched near the base, 12-50 cm tall, spreading or ascending.
All basal, clustered near the ground, finely dissected, greyish, hairy to woolly-hairy; ultimate segments not resembling leaflets, small, narrow, pinnately dissected.
Inflorescence of compound umbels; flowers white or purplish-white, rarely yellow; spokes of the umbel elongating unequally, 2-6 cm long; involucel bractlets narrow, mostly linear or irregularly fused, well-developed and conspicuous.
Oblong to elliptic, 7-28 mm long, glabrous; wings of the fruit narrow to fairly broad.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Early Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Spring
Source:  The USDA

Habitat / Range

Dry rocky or gravelly slopes and grasslands in the lowland, steppe and montane zones; common in SC BC, rare in SW and SE BC; E to MB and S to SD, CO, UT and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Lomatium macrocarpum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 10 814 2217
Slope Gradient (%) 0 24 105
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 193 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 6
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(395), CWH(1), ESSF(34), ICH(2), IDF(226), MS(27), PP(143)


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 not evaluated, unknown or variable.

Synonyms and Alternate Names

Cogswellia macrocarpa (Nutt. ex Torr. & A. Gray) M.E. Jones
Ferula macrocarpa Hook. & Arn.
Lomatium macrocarpum var. artemisiarum Piper
Lomatium macrocarpum var. ellipticum (Torr. & A. Gray) Jeps.
Peucedanum macrocarpum Nutt. ex Torr. & A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References