1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus mollis (Trin.) Pilg.

        This species is accepted, and its native range is N. China to Russian Far East and Japan, Subarctic America to N. & W. U.S.A.

    [GB]
    Habit
    Perennial; culms solitary, or caespitose; clumped loosely. Rhizomes elongated; scaly. Butt sheaths light brown; persistent and investing base of culm; with fibrous dead sheaths. Culms erect; robust; 30-100 cm long; 3-4 mm diam.; 3-4 -noded. Culm-internodes terete; distally glabrous. Leaves mostly basal. Leaf-sheaths loose; 7-25 cm long; glabrous on surface. Ligule an eciliate membrane; 1-3 mm long; truncate. Leaf-blades involute; 14-45 cm long; 6-12 mm wide; stiff; glaucous. Leaf-blade surface ribbed; scaberulous; rough adaxially. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Peduncle pubescent above. Racemes 1; single; erect; bilateral; 9-25 cm long; 12-22 mm wide. Rhachis flattened; pubescent on surface; scabrous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 5-20 mm long. Spikelets appressed; in pairs, or in threes. Fertile spikelets sessile; 2-3(-5) in the cluster.
    Spikelets
    Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-22 mm long; 5-7 mm wide; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus glabrous; base truncate. Rhachilla internodes 2-3 mm long; pubescent.
    Fertile
    Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-22 mm long; 5-7 mm wide; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus glabrous; base truncate. Rhachilla internodes 2-3 mm long; pubescent.
    Glume
    Glumes persistent; similar; subequal in width; reaching apex of florets. Lower glume lanceolate; 14-22 mm long; 1 length of upper glume; coriaceous; 1-keeled; (3-)5 -veined. Lower glume surface pubescent. Lower glume apex attenuate. Upper glume lanceolate; 14-22 mm long; 1.2-1.3 length of adjacent fertile lemma; coriaceous; 1-keeled; (3-)5 -veined. Upper glume surface pubescent. Upper glume apex attenuate.
    Florets
    Fertile lemma lanceolate; 12-17 mm long; 3-4 mm wide; chartaceous; keeled; keeled above; 5 -veined. Lemma surface pubescent. Lemma apex acute. Palea 10-13 mm long; 2 -veined. Palea keels ciliate. Palea surface pubescent. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; elliptic; membranous. Anthers 3; 6-7 mm long. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp; apex unappendaged. Hilum linear.
    Distribution
    Asia-temperate: Soviet far east, China, and eastern Asia. North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, and southwest USA.
    Reference
    Triticeae. Koyama 1997.

    Images

    Distribution

    Native to:

    Alaska, Alberta, Aleutian Is., British Columbia, California, China North-Central, Greenland, Illinois, Japan, Kamchatka, Khabarovsk, Korea, Kuril Is., Labrador, Magadan, Maine, Manchuria, Manitoba, Masachusettes, Michigan, Mongolia, New Brunswick, New Hampshire, Newfoundland, Northwest Territorie, Nova Scotia, Nunavut, Ontario, Oregon, Pennsylvania, Primorye, Prince Edward I., Québec, Sakhalin, Saskatchewan, Washington, Wisconsin, Yukon

    Leymus mollis (Trin.) Pilg. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Seemann, B.C. [s.n.] K001065458
    Erskine, D. [1044], Prince Edward I. K001065459 isotype
    Nuttall, T. [s.n.] K001065455
    Pullen, W.J.S. [176] K001065454
    Dore, W.G. [13716], Prince Edward I. K001065460 paratype
    s.coll. [246] K001065456
    s.coll. [s.n.] K001065457

    First published in Bot. Jahrb. Syst. 74: 6 (1947)

    Accepted by

    • Gillespie, L.J. & al. (2015). New vascular plant records for the Canadian Arctic Archipelago PhytoKeys 52: 23-79.
    • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.

    Literature

    Kew Backbone Distributions
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
    • Koyama, T. (1987). Grasses of Japan and its neighboring regions: an identification manual: 1-570. Kodansha, Tokyo, Japan.
    • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.
    • Hultén, E.O.G. (1960). Flora of the Aleutian Islands and westernmost Alaska Peninsula: with notes on the flora of Commander Islands, ed. 2: 1-376. Weinheim : J. Cramer ; New York : Hafner Pub. Co.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    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 Selected Plant Families 2018. 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 2018. 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