Quaking-grass

Briza media

Summary 7

Briza media is a perennial grass in the family Poaceae and is a species of the genus Briza.

National distribution 8

Canada
Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States
Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Physical description 9

Perennials, Terrestrial, not aquatic, Rhizomes present, Rhizome short and compact, stems close, 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 basa l leaves, Leaves mostly basal, below middle of stem, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, 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, Leaf blades scabrous, roughened, or wrinkled, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence lax, widely spreading, branches drooping, pendulous, Inflorescence branches more than 10 to numerous, Flowers bisexual, Spikelet 3-10 mm wide, Spikelets with 3-7 florets, Spikelets with 8-40 florets, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating above the glumes, glu mes 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 shorter than adjacent lemma, Glumes 3 nerved, Glumes 4-7 nerved, Glumes 8-15 nerved, Lemma similar in texture to glumes, Lemma 5-7 nerved, Lemma 8-15 nerved, Lemma glabrous, Lemma body or surface hairy, Lemma apex truncate, rounded, or obtuse, Lemma awnless, Lemma mucronate, very shortly beaked or awned, less than 1-2 mm, Lemma awn less than 1 cm long, Lemma awns straight or curved to base, Lemma margins thin, lying flat, Lemma saccate or swollen, Lemma straight, Palea present, well developed, Palea membranous, hyaline, Palea shorter than lemma, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis.

Habitat 10

Meadow slopes, grassy clearings in forests; 3600–3800 m.

National nature serve conservation status 11

Canada
Rounded National Status Rank: NNA - Not Applicable
United States
Rounded National Status Rank: NNA - Not Applicable

Sources and Credits

  1. (c) Sarah, some rights reserved (CC BY-SA), http://www.flickr.com/photos/dluogs/6818809269/
  2. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/SDL-Briza-media-00001.jpg
  3. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/JCS-Briza-media-65926.JPG
  4. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/jcs-briza-media-57122.jpg
  5. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/SDL-Briza-media-00002.jpg
  6. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/jcs-briza-media-57121.jpg
  7. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Briza_media
  8. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/29015272
  9. (c) Dr. David Bogler, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/6658101
  10. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/19814843
  11. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/29015270

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