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Scribner's Bluegrass

Poa trivialis

Summary 8

Poa trivialis (rough bluegrass;UK:rough-stalked meadow-grass), is a perennial plant, but regarded in the USA as an ornamental plant. It is part of the Poa family.

National distribution 9

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 10

Perennials, Terrestrial, not aquatic, Stolons or runners present, Stems nodes swollen or brittle, Stems erect or ascend ing, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, 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 basal, below middle of stem, 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, Ligule present, Ligule an unfringed eciliate membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence a contracted panicle, narrowly paniculate, branches appressed or ascending, 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, Lower panicle branches whorled, Flowers bisexual, Spikelets pedicellate, Spikelets laterally compressed, Spikelet less than 3 mm wide, Spikelets with 2 florets, Spikelets with 3-7 florets, Spikelets solitary at 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 keeled or winged, Glumes 3 nerved, Lemmas thin, chartaceous, hyaline, cartilaginous, or membranous, Lemma similar in texture to glumes, Lemma 5-7 nerved, Lemma glabrous, Lemma body or surface hairy, Lemma apex acute or acuminate, Lemma awnless, Lemma margins thin, lying flat, Lemma straight, Callus or base of lemma evidently hairy, Callus hairs shorter than lemma, Lemma with long co bwebby white hairs, Palea present, well developed, Palea about equal to lemma, Palea 2 nerved or 2 keeled, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudinally grooved, hilum long-linear.

Habitat 11

Moist places, grassy places on slopes; 1000–3500 m.

National nature serve conservation status 12

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

Sources and Credits

  1. (c) James K. Lindsey, some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:Poa.trivialis.-.lindsey.jpg
  2. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/photos/SDL-Poa-trivialis-00001.jpg
  3. (c) Soreng, R.J., some rights reserved (CC BY-NC-SA), https://collections.nmnh.si.edu/services/media.php?env=botany&irn=10337147
  4. (c) Soreng, R.J., some rights reserved (CC BY-NC-SA), https://collections.nmnh.si.edu/services/media.php?env=botany&irn=10337321
  5. (c) licensed media from BioImages DwCA without owner, some rights reserved (CC BY-NC-SA), http://www.bioimages.org.uk/html/../image.php?id=39025
  6. (c) licensed media from BioImages DwCA without owner, some rights reserved (CC BY-NC-SA), http://www.bioimages.org.uk/html/../image.php?id=39026
  7. (c) anonymous, some rights reserved (CC BY-NC), http://www.biopix.com/PhotosMedium/JCS%20Poa%20trivialis%2037088.jpg
  8. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Poa_trivialis
  9. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/29113646
  10. (c) Dr. David Bogler, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/6659158
  11. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/19815905
  12. (c) NatureServe, some rights reserved (CC BY-NC), http://eol.org/data_objects/29113644

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