Koeleria riguorum Edgar & Gibb

This species is accepted, and its native range is New Zealand South Island.

[GB]
Morphology General Habit
Perennial. Rhizomes elongated. Butt sheaths persistent and investing base of culm. Basal innovations extravaginal. Culms erect, or geniculately ascending; slender; 25-36 cm long. Culm-internodes distally glabrous to hirsute. Leaf-sheaths ribbed; puberulous. Ligule a ciliolate membrane; 0.6-1.1 mm long; truncate, or acute. Leaf-blades filiform, or linear; flat, or conduplicate, or involute; 3.2-17 cm long; 0.3-1.2 mm wide. Leaf-blade surface ribbed; grooved adaxially; puberulous; hairy adaxially. Leaf-blade margins scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle spiciform; linear; interrupted; 2-7 cm long; 0.3-1 cm wide. Panicle axis pubescent. Panicle branches pubescent. Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets laterally compressed; 3.6-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.2 mm long; pubescent.
Fertile
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets laterally compressed; 3.6-6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.2 mm long; pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture; shiny; gaping. Lower glume lanceolate, or elliptic; 3.4-4.1 mm long; 0.9-1 length of upper glume; membranous; 1-keeled; 1-3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent, or distinct. Lower glume apex entire, or erose; obtuse, or acute. Upper glume lanceolate, or elliptic; 4-4.2 mm long; 0.9-1 length of adjacent fertile lemma; membranous; 1-keeled; 3-5(-7) -veined. Upper glume primary vein scabrous. Upper glume apex entire, or erose; obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 4-4.6 mm long; membranous; shiny; keeled. Lemma surface smooth, or asperulous; rough above. Lemma apex entire, or dentate; 2 -fid; muticous, or mucronate, or awned; 1 -awned. Principal lemma awn subapical; 0-2 mm long overall. Palea gaping; 4-4.2 mm long; 1 length of lemma. Palea keels scabrous; adorned above; with 0.66 of their length adorned. Rhachilla extension 1-1.5 mm long; pilose.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.5-1.2 mm long; membranous. Anthers 3; 0.5-1.7 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 2 mm long.
Distribution
Australasia: New Zealand.
Reference
Aveneae. Edgar & Gibb 2000.

Native to:

New Zealand South

Koeleria riguorum Edgar & Gibb appears in other Kew resources:

First published in New Zealand J. Bot. 37: 59 (1999)

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.
  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.

Literature

Kew Backbone Distributions

  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.

  • 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