1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis filifolia Merr.

        This species is accepted, and its native range is Taiwan, Philippines, New Guinea.

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Rhizomes short. Culms erect; 30-50 cm long; 0.8-1.5 mm diam.; 1-2 -noded. Culm-internodes smooth. Leaves mostly basal. Leaf-sheaths 2-5 cm long; smooth; glabrous on surface. Ligule an eciliate membrane; 0.7-3 mm long. Leaf-blades filiform; involute; 15-30 cm long; 2-3 mm wide; stiff. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle. Peduncle smooth, or scaberulous above. Panicle contracted; linear, or lanceolate; 6-20 cm long; 0.7-1.6 cm wide. Primary panicle branches appressed; 1-6 cm long; bearing spikelets almost to the base. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.8-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.33-0.5 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.8-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.33-0.5 length of lemma.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 4.8-5.5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 4.8-6.5 mm long; 1.2-1.4 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled. Upper glume primary vein scabrous. Upper glume surface asperulous. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 4-4.5 mm long; membranous; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma surface asperulous. Lemma apex entire; acuminate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25-0.33 way up back of lemma; geniculate; 5-6 mm long overall; with twisted column. Rhachilla extension 1 mm long; pilose.
    Flowers
    Lodicules 2. Anthers 3; 1-1.2 mm long. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    Asia-temperate: eastern Asia. Asia-tropical: Malesia and Papuasia.
    Reference
    Aveneae. Koyama 1994.

    Images

    Distribution

    Native to:

    New Guinea, Philippines, Taiwan

    Calamagrostis filifolia Merr. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Merrill, E.D. [4537], Philippines K000290486 isolectotype
    Sonster, J. [455], New Guinea K000290483 holotype
    Sonster, J. [455], New Guinea K000290484 isotype

    First published in Philipp. J. Sci. 1(Suppl.): 179 (1906)

    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.

    Literature

    Kew Backbone Distributions
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

    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 2020. 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 2020. 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