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

Lomatium triternatum subsp. platycarpum (Pursh) J.M. Coult. & Rose (Torr.) Cronquist
nine-leaved desert-parsley

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Lomatium triternatum subsp. platycarpum
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Species Information

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Perennial herb from an elongated taproot, seldom thickened, surmounted by a simple branched crown or stem-base; stems or scapes solitary or few, erect, 10-80 cm tall, glabrous.
Mostly basal, pinnately compound, divided 1-3 times or, at the base, 2-3 times; stem leaves 1 or more on the middle or upper stem; ultimate leaf segments narrow and scarcely leaflike, usually less than 5 mm wide, finely hairy.
Inflorescence of compound umbels; flowers yellow, spokes of the umbel elongating unequally, 2-10 cm long; involucels present.
Oblong to broadly elliptic, 7-15 mm long, narrowly to very broadly winged, glabrous to minutely hairy or granular-roughened.
Two subspecies occur in BC:

1. Fruits broadly elliptic, wings nearly or fully as wide as body; ultimate leaf segments linear................ ssp. platycarpum (Torr.) Cronq

1. Fruits usually relatively narrow, wings usually half as wide as body; ultimate leaf segments lanceolate..................... ssp. triternatum

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry open slopes and grasslands in the lowland, steppe and montane zones; frequent in SC and SE BC (ssp. triternatum), rare on S Vancouver Island (ssp. platycarpum); E to SW AB and S to CO, UT and CA.

Source: The Illustrated Flora of British Columbia


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

Lomatium simplex (Nutt.) J.F. Macbr.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References