Genus:
Poa L.

Poa pearsonii Reeder

This species is accepted, and its native range is Peru to N. Chile.

[GB]
Morphology General Habit
Perennial; caespitose; clumped densely. Culms geniculately ascending; 18-40 cm long; 2-3 -noded. Lateral branches lacking. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 10-20 mm long; acuminate. Leaf-blades involute; 8-20 cm long; 2-4 mm wide; stiff. Leaf-blade surface scabrous; rough abaxially; pubescent; densely hairy; hairy adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle smooth, or scaberulous above. Panicle open; elliptic; 6-12 cm long. Primary panicle branches ascending. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Fertile
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 4.5-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 3-3.8 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 3.5-4.2 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 4.2-4.8 mm long; membranous; keeled; 5 -veined. Lemma surface scabrous. Lemma apex acute. Palea keels scabrous.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 2 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
South America: western South America.
Reference
Poeae. Tovar 1995.

Native to:

Bolivia, Chile North, Peru

Poa pearsonii Reeder appears in other Kew resources:

First published in J. Washington Acad. Sci. 41: 295 (1951)

Accepted by

  • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru. Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286. Missouri Botanical Garden.
  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
  • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur. Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348. Missouri Botanical Garden.

Literature

Kew Backbone Distributions

  • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru. Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286. Missouri Botanical Garden.
  • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
  • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur. Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348. Missouri Botanical Garden.

  • GrassBase - The Online World Grass Flora

    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0