Overview

Distribution

Range Description

Bromus suksdorfii is a perennial grass, which is endemic to the northwestern and southwestern USA (Hitchcock 1950, Clayton et al. 2002). The taxon is also reported to occur in Canada (British Columbia) (Quian and Klinka 1998).
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National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Physical Description

Perennials, Terrestrial, not aquatic, Stems nodes swollen or brittle, Stems erect or ascending, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly closed, Leaf sheath smooth, glabrous, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades 2-10 mm wide, Leaf blades mostly flat, Leaf blades mostly glabrous, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence a contracted panicle, narrowly paniculate, branches appressed or ascending, Inflorescence a dense slender spike-like panicle or raceme, branches contracted, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence with 2-10 branches, Inflorescence branches more than 10 to numerous, Flowers bisexual, Spikelets pedicellate, Spikelets laterally compressed, Spikelet 3-10 mm wide, Spikelets with 3-7 florets, Spikelets solitary a t rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glumes persistent, Spikelets disarticulating beneath or between the florets, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes equal or subequal, Glumes distinctly unequal, Glumes shorter than adjacent lemma, Glumes 1 nerved, Glumes 3 nerved, Lemmas thin, chartaceous, hyaline, cartilaginous, or membranous, Lemma 5-7 nerved, Lemma body or surface hairy, Lemma apex truncate, rounded, or obtuse, Lemma distinctly awned, more than 2-3 mm, Lemma with 1 awn, Lemma awn less than 1 cm long, Lemma awn subapical or dorsal, Lemma awns straight or curved to base, Lemma margins thin, lying flat, Lemma straight, Palea present, well developed, Palea membranous, hyaline, Palea shorter than lemma, Palea 2 nerved or 2 keeled, Palea keels winged, scabrous, or ciliate, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudinally grooved, hilum long-linear, Caryopsis hairy at apex.
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Dr. David Bogler

Source: USDA NRCS PLANTS Database

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Type Information

Isotype for Bromus suksdorfii Vasey
Catalog Number: US 81595
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): W. N. Suksdorf
Year Collected: 1883
Locality: Mt. Paddo., Yakima, Washington, United States, North America
  • Isotype: Vasey, G. 1885. Bot. Gaz. 10: 223.
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Isotype for Bromus suksdorfii Vasey
Catalog Number: US 86725
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): W. N. Suksdorf
Year Collected: 1883
Locality: Mt. Paddo. (Adams)., Yakima, Washington, United States, North America
  • Isotype: Vasey, G. 1885. Bot. Gaz. 10: 223.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species grows on open slopes and in open subalpine forests, from 1,300 to 3,300 m, over 12 ecoregions. The taxon forms small bunches in dry/moist loose soils and is often found on disturbed sites (Quattrochi 2004).

Systems
  • Terrestrial
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Bromus suksdorfii

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Bromus suksdorfii

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2014

Assessor/s
Romand-Monnier, F.

Reviewer/s
Hilton-Taylor, C.

Contributor/s

Justification
Bromus suksdorfii is rated as Least Concern due to its large geographic range, low habitat specificity and ruderal habit, the fact that it is locally abundant, the absence of known threats and its occurrence in many protected areas.
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National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Population

Population
This species is known from ca. 160 botanical records. This grass is widespread and locally abundant in many parts of its range but localized and uncommon in others.

Population Trend
Stable
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Threats

Major Threats
There are no known threats to this wide ranging, locally abundant ruderal grass.
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Management

Conservation Actions

Conservation Actions
The taxon occurs within numerous protected areas throughout its range. Its conservation status has been rated as G5 (NatureServe 2009) indicating a 'Secure' species that is common, widespread and abundant.
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