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Montana Field Guide

Montana Field Guides

Little Indian Breadroot - Pediomelum hypogaeum

Potential Species of Concern

Global Rank: G5
State Rank: S3S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 3
C-value:

External Links






State Rank Reason (see State Rank above)
See rank details.
  • Details on Status Ranking and Review
    Little Indian Breadroot (Pediomelum hypogaeum) Conservation Status Review
    Review Date = 06/10/2013
    View State Conservation Rank Criteria
    Population Size

    Score2 - Small: Generally 2,000-10,000 individuals.

    Range Extent

    Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

    Area of Occupancy

    Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1-2 - Moderate to High.

    Trends

    ScoreNA - Rank factor not assessed.

    CommentNo data on trends available.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score1 - Moderate Vulnerability: Specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species susceptible to extirpation from stochastic events or other adverse impacts to its habitat and slow to recover.

    Raw Conservation Status Score

    Score 5 to 7 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Little Indian Breadroot is a perennial herb with a deep, club-shaped root that is up to 6 cm long and surmounted by a subterranean connecting stem. Above ground, the plant consists of a rosette of long-petioled leaves that are palmately divided into 3-7 linear-elliptic leaflets that are 25-50 mm long. The foliage is covered with dot-like glands and dense, white appressed hairs, but the upper leaf surfaces become glabrous with age. Blue, pea-like flowers are borne in condensed spikes arising among the bases of the leaf petioles at or barely above ground-level. The tubular calyx is 6-9 mm long and has 4 long, narrow lobes and a fifth that is longer and broader. The upper petal is 10-13 mm long and held forward. The hairy pods are egg-shaped, ca. 5 mm long, and each has a beak that is 5-13 mm long.

Phenology
Flowering late May-June.

Diagnostic Characteristics
Psoralea esculenta has a distinct flowering stem with spreading pubesence on the stem and leaf petiole, while Psoralea hypogaea is stemless and has appressed pubesence.

Species Range
Present
 


Range Comments
Great Plains, from NE to MT, and south from TX to NM. Peripheral.

Summary of Observations Submitted for Montana
Number of Observations: 27

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

Recency

 

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



Habitat
Loose, sandy soil of grasslands and open pine woodlands on the plains, below sandstone outcrops and in blowouts.

References
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Citation for data on this website:
Little Indian Breadroot — Pediomelum hypogaeum.  Montana Field Guide.  .  Retrieved on , from