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Montana Field Guides

Large-bracted Scurf-pea - Pediomelum cuspidatum

Status Under Review
Undetermined Origin

Global Rank: G4
State Rank: SNA
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Reported for eastern Montana (Dorn 1984). More information needed to determine the status of the species in the state.
General Description
Perennials with shortly branching caudex; stems procumbent to ascending (rarely erect), up to 90 cm tall, branched above, sparsely appressed-pubescent. Leaves palmately 3-5 foliate; leaflets 2.5-6 cm long, 1-3 cm wide. Inflorescence a dense spicate raceme 4-9 cm long. Calyx tube 4-7 mm at anthesis, gibbous at base, longest lobe (=lower lobe) 7-12(-15) mm, tube strigose and glandular. Corolla blue, purple, blue-lavendar or rarely white; banner 12-15 mm long with short basal lobes, claw 4-6 mm long, curved; wings with blades 1 cm long, claws 5-7 mm long, free portin of keel 4-6 mm long. Pods 6-8 cm long, enclosed in enlarged calyx, the curved beak 2 mm long. Seeds 4-5 mm long, olivaceous to dark brown, smooth (adapted from: McGregor, 1986, Flora of the Great Plains).

Range Comments
Central Great Plains, SD and NE south to TX (Kartesz in prep. 2012). Collected from counties in SD and WY adjacent to MT, thus to be expected in MT.

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Dry prairies, gravelly hilltops and slopes, stream valleys, chalk bluffs, and badlands (McGregor, 1986, in Flora of the Great Plains).

The following animal species have been reported as pollinators of this species or genera where their geographic ranges overlap: Bombus pensylvanicus, Bombus griseocollis, and Bombus impatiens (Colla and Dumesh 2010).

  • Literature Cited AboveLegend:   View Online Publication
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141: 39-68.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Web Search Engines for Articles on "Large-bracted Scurf-pea"
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Citation for data on this website:
Large-bracted Scurf-pea — Pediomelum cuspidatum.  Montana Field Guide.  .  Retrieved on , from