Puccinellia walkeri (Kirk) Allan

First published in Introd. Grass. N. Zeal.: 40, 157 (1936)
This species is accepted
The native range of this species is New Zealand South Island, Chatham Islands, Antipedean Islands. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped densely. Butt sheaths yellow, or grey, or light brown, or purple. Basal innovations intravaginal. Culms erect; 10-50 cm long. Leaf-sheaths open for most of their length; longer than adjacent culm internode; without keel; smooth. Ligule an eciliate membrane; 0.6-3 mm long; entire; truncate, or obtuse. Leaf-blades conduplicate; 5-25 cm long; 5-10 mm wide. Leaf-blade surface ribbed; grooved adaxially; scaberulous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 2-17 cm long; 2-14 cm wide. Primary panicle branches appressed. Panicle branches angular; smooth, or scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.5 mm long. Floret callus glabrous.
Fertile
Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.5 mm long. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate, or oblong; 1.5-3.6 mm long; 0.75 length of upper glume; membranous; without keels; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume lanceolate, or oblong; 2-4.5 mm long; 0.66-0.9 length of adjacent fertile lemma; membranous; without keels; 3-5 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic, or oblong; 3-4.8 mm long; membranous; much thinner above; glaucous; without keel; 5-7 -veined. Lemma midvein extending to apex. Lemma lateral veins stopping well short of apex. Lemma surface glabrous, or puberulous; hairy below, or at base; hairy on veins. Palea 2 -veined. Palea keels scabrous; eciliate; adorned above; with 0.33-0.66 of their length adorned. Palea apex muticous, or with excurrent keel veins. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.8-1.5 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 1.8-2.6 mm long. Hilum punctiform.
Distribution
Australasia: New Zealand.
Reference
Poeae. Edgar 1995.
[GB]

Sources

  • 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 Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0