1. Family: Poaceae Barnhart
    1. Genus: Stephanachne Keng
      1. Stephanachne nigrescens Keng

        This species is accepted, and its native range is Qinghai to Central China.

    [GB]
    Habit
    Perennial. Culms erect; 90 cm long; 2 mm diam.; 4 -noded. Culm-internodes 12-23 cm long. Leaf-sheaths as wide as blade at the collar; striately veined; glabrous on surface. Ligule an eciliate membrane; 1-5 mm long; erose. Leaf-blades erect; flat, or involute; 15-20 cm long; 5-6 mm wide. Leaf-blade surface smooth, or scaberulous; rough abaxially; glabrous, or puberulous; hairy adaxially. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear; interrupted; 7-9 cm long; 1.2 cm wide. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 1-4 mm long; puberulous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 12-16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1.5 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 12-16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1.5 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; gaping. Lower glume linear; 1 length of upper glume; membranous; much thinner on margins; without keels; 3-5 -veined. Lower glume apex acuminate. Upper glume linear; 12-16 mm long; 1.3-1.8 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 3 -veined. Upper glume apex acuminate.
    Florets
    Fertile lemma ovate; 9 mm long; membranous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface pubescent; hairy below; with a transverse fringe of hair. Lemma hairs 4-5 mm long. Lemma apex lobed; 2 -fid; with lanceolate lobes; with lobes 4 mm long; incised 0.3-0.4 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 12-15 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 2-4 mm long. Palea 7-8 mm long; 2 -veined. Palea surface pilose; hairy on back.
    Flowers
    Lodicules 3; 3 mm long. Anthers 3; 1.2-1.6 mm long. Stigmas 2. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China.
    Reference
    Poeae. Keng.

    Images

    Distribution

    Native to:

    China North-Central, China South-Central, Qinghai

    Stephanachne nigrescens Keng appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Fang, W.P. [4026], Sichuan K000308202 Unknown type material

    First published in Contr. Biol. Lab. Sci. Soc. China, Bot. Ser. 9: 135 (1934)

    Accepted by

    • 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.

    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