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Montana Field Guides

American Winter-cress - Barbarea orthoceras


Global Rank: G5
State Rank: S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






State Rank Reason (see State Rank above)
S4 non-SOC: Barbarea orthoceras appears to be present through much of central and western Montana.
  • Details on Status Ranking and Review
    American Winter-cress (Barbarea orthoceras) Conservation Status Review
    Review Date = 09/23/2016
    View State Conservation Rank Criteria
    Population Size

    ScoreU - Unknown

    Range Extent

    ScoreF - 10,000 - 100,000 individuals

    Area of Occupancy

    ScoreE - 26-125 4-km2 grid cells

    Number of Populations

    ScoreC - 21 - 80

    Number of Occurrences or Percent Area with Good Viability / Ecological Integrity

    ScoreC - Few (4-12) occurrences with excellent or good viability or ecological integrity

    Environmental Specificity

    ScoreC - Moderate. Generalist or community with some key requirements scarce

    Long-term Trend

    ScoreU - Unknown

    Trends

    ScoreU - Unknown

    Threats

    ScoreD - Low

    CommentThreat categories include: Housing & urban areas, Annual & perennial non-timber crops.

    Intrinsic Vulnerability

    ScoreC - Not intrinsically vulnerable

 
General Description
Plants: Glabrous to sparingly-haired bienniel herb with a taproot (Hitchcock et al. 1964) Stems angled, unbranched or branched above (McGregor et al. 1986), erect, 20–50 cm tall (Lesica 2012).

Leaves: Basal leaves 4–12 cm in length, oblong with 1 to 6 pairs of lateral lobes with sinuate margins. Stem leaves pinnately lobed or divided, reduced upward (Lesica 2012).

Inflorescence: Dense racemes; pedicels thick or club-shaped, up to 1 mm in length (McGregor et al. 1986).

(P. Lesica's contribution adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.)

Phenology
Flowers March-July (FNA 2010).

Range Comments
AK to NL south to CA, AZ, MN, NH; Asia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Scree, rocky bluffs (FNA 2010), moist soil of thickets, wet meadows, along streams, wetlands, open forest; valleys to lower subalpine (Lesica 2012).

(Lesica's contribution adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.)

Reproductive Characteristics
Flowers: Sepals light yellow-green, 2 mm in length (Hitchcock et al. 1964), upright, oblong; petals light yellow (McGregor et al. 1986), 3–6 mm in length (Lesica 2012).

Fruits: Siliques 15–25 mm in length, up to 1 mm in width, 4-angled, erect or spreading, with a beak 2 mm in length (Lesica 2012); valve with prominent midnerve (Hitchcock et al. 1964). Seeds brown, minutely wrinkled, 0.8-1 mm in width (McGregor et al. 1986).

(P. Lesica's contribution adapted from Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.)

References
  • Literature Cited AboveLegend:   View Online Publication
    • Flora of North America Editorial Committee, eds. 2010. Flora of North America North of Mexico. Volume 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, Inc., NY. 832 pp.
    • Hitchcock, C. L., A. Cronquist, M. Ownbey, and J. W. Thompson. 1964. Vascular Plants of the Pacific Northwest. Part 2: Salicaceae to Saxifragaceae. University of Washington Press, Seattle. 597 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • McGregor, R.L., coordinator, and T.M. Barkley, R.E. Brooks, and E.K. Schofield, eds.: Great Plains Flora Association. 1986. Flora of the Great Plains. Lawrence, KS: Univ. Press Kansas. 1392 pp.
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Citation for data on this website:
American Winter-cress — Barbarea orthoceras.  Montana Field Guide.  .  Retrieved on , from