1. Family: Poaceae Barnhart
    1. Genus: Puccinellia Parl.
      1. Puccinellia rupestris (With.) Fernald & Weath.

        This species is accepted, and its native range is W. Europe.

    [GB]
    Habit
    Annual; caespitose. Culms decumbent, or prostrate; 4-40 cm long; 1-3 -noded. Leaf-sheaths open for most of their length; without keel; smooth. Ligule an eciliate membrane; 1-2.5 mm long. Leaf-blades 1-10 cm long; 2-6 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex obtuse, or abruptly acute; hooded.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong, or ovate; dense; secund; 2-8 cm long; 1-4.5 cm wide. Primary panicle branches ascending, or spreading; bearing spikelets almost to the base. Panicle branches stiff; scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.
    Spikelets
    Spikelets comprising 3-5 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. Floret callus pubescent.
    Fertile
    Spikelets comprising 3-5 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. Floret callus pubescent.
    Glume
    Glumes persistent; dissimilar; shorter than spikelet. Lower glume ovate; 1.5-2.5 mm long; 0.6-0.8 length of upper glume; membranous; much thinner on margins; without keels; 1-3 -veined. Lower glume apex obtuse. Upper glume ovate; 2.5-3 mm long; 0.75-0.8 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex obtuse.
    Florets
    Fertile lemma elliptic; 3-4 mm long; membranous; much thinner above; much thinner on margins; without keel; 5 -veined. Lemma lateral veins obscure; stopping well short of apex. Lemma surface puberulous; hairy below. Lemma apex erose; obtuse; muticous, or mucronate. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 1 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; 2 mm long. Embryo 0.6 length of caryopsis. Hilum punctiform.
    Distribution
    Europe: northern, central, and southwestern. Asia-temperate: western Asia. Australasia: New Zealand. North America: northeast USA.
    Reference
    Poeae. CEH.

    Distribution

    Native to:

    Belgium, France, Great Britain, Netherlands, Spain

    Introduced into:

    New Jersey, New Zealand South, Norway, Pennsylvania, Washington

    Puccinellia rupestris (With.) Fernald & Weath. appears in other Kew resources:

    First published in Rhodora 18: 10 (1916)

    Not 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. [Cited as Pseudosclerochloa rupestris.]

    Literature

    Kew Backbone Distributions
    • von Raab-Straube, E. (ed.) (2012-continuously updated). The Euro+Med PlantBase - the information resource for Euro-Mediterranean plant diversity http://ww2.bgbm.org/EuroPlusMed/query.asp.
    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

    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 Selected Plant Families 2019. 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 2019. 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