Family:
Poaceae Barnhart
Genus:
Poa L.

Poa macusaniensis (E.H.L.Krause) Refulio

This species is accepted, and its native range is Peru to NE. Argentina.

[GB]
Morphology General Habit
Annual. Culms slender; 3-7 cm long. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.7-1.7 mm long. Leaf-blades ascending; involute; 1-4 cm long; 1-2 mm wide. Leaf-blade surface smooth; glabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; shorter than basal leaves. Panicle spiciform; oblong; 1-2 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 3.3-4.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3-0.4 mm long.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 3.3-4.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3-0.4 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate, or oblong; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 3 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume apex acute. Upper glume oblong, or ovate; 3.3-4.2 mm long; 1.3-1.5 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 2.5-2.8 mm long; chartaceous; much thinner above; keeled; 3 -veined. Lemma lateral veins close to margins. Lemma surface puberulous. Lemma apex dentate; 3 -fid; with outer lobes shorter; acute. Palea keels ciliolate.
Morphology Reproductive morphology Flowers
Anthers 3; 0.3 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Endosperm farinose.
Distribution
South America: western South America.
Reference
Aveneae. Swallen.

Native to:

Argentina Northeast, Bolivia, Peru

Poa macusaniensis (E.H.L.Krause) Refulio appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Lechler, W. [1836?], Peru Dissanthelium macusaniense K000433977 Yes

First published in Syst. Bot. 37: 129 (2012)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6. Scientific Data 8: 215.

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

  • 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