Puccinellia arctica (Hook.) Fernald & Weath.

First published in Rhodora 18: 5 (1916)
This species is accepted
The native range of this species is Subarctic America. It is a perennial and grows primarily in the subalpine or subarctic biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms 10-55 cm long. Ligule an eciliate membrane; 1-2.5 mm long; glabrous on abaxial surface, or scaberulous on abaxial surface. Leaf-blades flat, or conduplicate, or involute; 4-9 cm long; 0.5-2.5 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or elliptic; 5-15 cm long. Primary panicle branches ascending, or spreading. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3.6-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3.6-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 0.8-1.5 mm long; 0.5-0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 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; 1.9-2.7 mm long; membranous; much thinner above; without keel; 5 -veined. Lemma lateral veins stopping well short of apex. Lemma surface pubescent; hairy at base. Lemma apex erose; obtuse. Palea 0.9 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5-1.1 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
North America: Subarctic.
Reference
Poeae. Fl Alaska 1994.
[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