Puccinellia tenella (Lange) Holmb.

First published in Meddel. Grønland 58: 45 (1926)
This species is accepted
The native range of this species is Subarctic to NE. U.S.A. It is a perennial and grows primarily in the subalpine or subarctic biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms geniculately ascending, or decumbent, or prostrate; 5-30 cm long. Ligule an eciliate membrane; 1-3 mm long; truncate, or obtuse. Leaf-blades flat, or involute; 4-7 cm long; 1-2 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by an unspecialized leaf-sheath, or an inflated leaf-sheath. Panicle open, or contracted; oblong, or ovate; 3-12 cm long. Primary panicle branches ascending, or spreading, or reflexed; 2-6 -nate. Spikelets solitary. Fertile spikelets pedicelled. Pedicels tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-6 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. Rhachilla internodes elongated between glumes.
Fertile
Spikelets comprising 3-6 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. Rhachilla internodes elongated between glumes.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate, or oblong; 0.5-1.5 mm long; 0.4-0.7 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex erose; truncate, or acute. Upper glume ovate; 1.2-2.1 mm long; 0.66 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate, or obovate; 2-3 mm long; membranous; much thinner above; without keel; 5 -veined. Lemma lateral veins obscure; stopping well short of apex. Lemma surface pubescent; hairy below; hairy on veins. Lemma apex erose; truncate, or obtuse. Palea 1 length of lemma; 2 -veined. Palea keels scabrous; eciliate; adorned below. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5-1 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 1.4-1.6 mm long. Hilum punctiform.
Distribution
Europe: northern and eastern. Asia-temperate: Siberia and Soviet far east. North America: Subarctic, western Canada, and eastern Canada.
Reference
Poeae. Circumpolar Fl 1994.
[GB]

Sources

  • 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 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