Genus:
Poa L.

Poa atropidiformis Hack.

This species is accepted, and its native range is S. Chile to S. Argentina.

[GB]
Morphology General Habit
Perennial; caespitose. Culms 10-30 cm long. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2-3 mm long; lacerate. Leaf-blades straight, or curved; conduplicate; 2-4 cm long; 2-3 mm wide. Leaf-blade venation prominent. Leaf-blade margins scabrous. Leaf-blade apex abruptly acute, or acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; embraced at base by subtending leaf, or enclosed. Panicle contracted; linear; 5-10 cm long. Primary panicle branches appressed; 1-4 cm long. Panicle axis scabrous. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 3.5-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5-1 mm long. Floret callus glabrous.
Fertile
Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 3.5-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5-1 mm long. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet, or reaching apex of florets. Lower glume lanceolate; 3.5-5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1-3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent, or distinct. Lower glume apex acute. Upper glume ovate; 3.5-5 mm long; 1.2-1.7 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2.5-3 mm long; membranous; much thinner on margins; keeled; 5 -veined. Lemma midvein scabrous. Lemma surface smooth, or scaberulous; rough above; glabrous, or pubescent. Lemma apex obtuse. Palea 1 length of lemma. Palea keels scabrous. Palea surface glabrous, or pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.4-0.8 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 1.2-1.5 mm long. Hilum punctiform.
Distribution
South America: southern South America.
Reference
Poeae. Fl Pat 1995.

Native to:

Argentina South, Chile South

Poa atropidiformis Hack. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Dauber, L. [180], Argentina K000433735 Yes

First published in P.K.H.Dusén, Ergebn. Schwed. Exp. Magell. 3(5): 224 (1900)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of 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

  • 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

  • Herbarium Catalogue Specimens

    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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