Puccinellia distans (Jacq.) Parl.

First published in Fl. Ital. 1: 367 (1850)
This species is accepted
The native range of this species is Subarctic to Temp. Eurasia. It is a perennial or annual and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect, or decumbent, or prostrate; 10-60 cm long; 2-4 -noded. Leaf-sheaths open for most of their length; without keel; smooth. Ligule an eciliate membrane; 1-2 mm long. Leaf-blades 2-10 cm long; 1.5-4 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex obtuse, or abruptly acute; hooded.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 3-18 cm long; 2-14 cm wide. Primary panicle branches reflexed; naked below. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Fertile
Spikelets comprising 3-9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; shorter than spikelet. Lower glume ovate; 1-1.5 mm long; 0.66 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 1.5-2 mm long; 0.75 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2-2.5 mm long; membranous; much thinner above; mid-green, or purple; without keel; 5 -veined. Lemma lateral veins obscure; stopping well short of apex. Lemma surface puberulous; hairy below. Lemma apex erose; obtuse. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.8-1 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 1.5 mm long. Embryo 0.25 length of caryopsis. Hilum punctiform.
Distribution
Europe: northern, central, southwestern, southeastern, and eastern. Africa: north and south. Asia-temperate: Siberia, Soviet far east, Soviet Middle Asia, Caucasus, western Asia, China, and Mongolia. Asia-tropical: India. Australasia: Australia and New Zealand. North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and southeast USA.
Reference
Poeae. CEH.
[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
  • Kew Science Photographs

    • Copyright applied to individual images