1. Family: Poaceae Barnhart
    1. Rostraria Trin.

      1. This genus is accepted, and its native range is Macaronesia, Medit. to Sahara and India, Caucasus to Central Asia and W. Himalaya, Peru to Chile.

    [GB]

    nonem

    Habit
    Annual. Culms erect, or geniculately ascending (9), or decumbent (1); 2.5-22.85-70 cm long. Lateral branches lacking (2/2), or sparse (1/2). Ligule an eciliate membrane. Leaf-blades linear, or lanceolate (1); firm (6), or flaccid (6).
    Inflorescences
    Inflorescence a panicle; exserted (11), or embraced at base by subtending leaf (1). Panicle contracted (1), or spiciform (11). Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong (9/9).
    Spikelets
    Spikelets comprising 1 fertile florets (1), or 2 fertile florets (3), or 3 fertile florets (9), or 4 fertile florets (10), or 5 fertile florets (6), or 6 fertile florets (3), or 7-8 fertile florets (2); with a barren rhachilla extension (4), or with diminished florets at the apex (8). Spikelets oblong (10), or obovate (3), or cuneate (1); laterally compressed; 2.5-4.645-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (4/11), or pubescent (6/11), or pilose (1/11). Floret callus glabrous (1/2), or pubescent (1/2).
    Fertile
    Spikelets comprising 1 fertile florets (1), or 2 fertile florets (3), or 3 fertile florets (9), or 4 fertile florets (10), or 5 fertile florets (6), or 6 fertile florets (3), or 7-8 fertile florets (2); with a barren rhachilla extension (4), or with diminished florets at the apex (8). Spikelets oblong (10), or obovate (3), or cuneate (1); laterally compressed; 2.5-4.645-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (4/11), or pubescent (6/11), or pilose (1/11). Floret callus glabrous (1/2), or pubescent (1/2).
    Glume
    Glumes persistent; shorter than spikelet (6), or reaching apex of florets (6), or exceeding apex of florets (2); gaping. Lower glume linear (1), or lanceolate (8), or elliptic (3); 0.25-0.7342-1 length of upper glume; membranous; without keels (6), or 1-keeled (6); 1 -veined (10), or 2 -veined (2), or 3 -veined (3). Lower glume lateral veins absent (10), or distinct (3). Lower glume surface glabrous (9), or puberulous (1), or pubescent (2), or pilose (1), or villous (1). Lower glume apex acute (5), or acuminate (5), or attenuate (2). Upper glume lanceolate (2), or elliptic (7), or oblong (1), or ovate (2); 0.75-0.9667-1.3 length of adjacent fertile lemma; membranous; with undifferentiated margins (11), or hyaline margins (1); without keels (4), or 1-keeled (8); 1 -veined (1), or 3 -veined (10), or 5 -veined (1). Upper glume primary vein eciliate (10), or ciliolate (3). Upper glume lateral veins without ribs (10/11), or ribbed (1/11). Upper glume surface glabrous (11), or puberulous (2), or pubescent (1), or pilose (1), or villous (1). Upper glume apex acute (9), or acuminate (2), or attenuate (1); muticous, or mucronate (1).
    Florets
    Fertile lemma linear (1), or lanceolate (1), or elliptic (4), or oblong (4), or ovate (2), or obovate (1); oblong in profile (1/1); membranous; of similar consistency on margins (3), or much thinner on margins (9); without keel (1), or keeled (11); 3 -veined (3), or 4 -veined (1), or 5 -veined (10). Lemma midvein without distinctive roughness (10), or scaberulous (1), or scabrous (1); eciliate (11), or ciliate (1). Lemma lateral veins obscure (1/1); without ribs (10), or ribbed (2). Lemma surface smooth (11), or asperulous (1), or papillose (1), or tuberculate (1); glabrous (7), or pubescent (5), or pilose (1), or setose (1); with simple hairs (6/7), or tubercle-based hairs (1/7). Lemma apex entire (3), or dentate (9); 2 -fid (9/9); emarginate (1/11), or truncate (1/11), or obtuse (2/11), or acute (7/11), or setaceously attenuate (1/11); muticous (1), or mucronate (2), or awned (11); 1 -awned (11/11). Principal lemma awn apical (2), or subapical (6), or from a sinus (1), or dorsal (4); straight (11), or curved (1), or geniculate (1); 0.9-1-1.1 length of lemma. Palea gaping; 0.5-0.751-1 length of lemma; hyaline (9), or membranous (3). Palea keels smooth (3), or scaberulous (9). Palea apex dentate (1/1); muticous (10), or awned (2). Apical sterile florets resembling fertile though underdeveloped (8/8).
    Flowers
    Lodicules 2 (3/3); membranous (3/3). Anthers 3. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp (2/2). Hilum punctiform (1/1).
    Distribution
    Europe (5), or Africa (8), or Temperate Asia (6), or Tropical Asia (3), or Australasia (3), or North America (1), or South America (2).

    Images

    Distribution

    Native to:

    Afghanistan, Albania, Algeria, Azores, Baleares, Bulgaria, Canary Is., Cape Verde, Chad, Chile Central, Chile North, Corse, Cyprus, East Aegean Is., Egypt, Eritrea, France, Greece, Gulf States, India, Iran, Iraq, Italy, Kriti, Krym, Kuwait, Lebanon-Syria, Libya, Madeira, Mauritania, Morocco, Niger, North Caucasus, Oman, Pakistan, Palestine, Peru, Portugal, Sardegna, Saudi Arabia, Selvagens, Sicilia, Sinai, Spain, Sudan, Tadzhikistan, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Uzbekistan, West Himalaya, Western Sahara, Yugoslavia

    Introduced into:

    Alabama, Argentina Northeast, Argentina Northwest, Arizona, Austria, Baltic States, Bermuda, Brazil South, California, Cape Provinces, Chile South, Czechoslovakia, Florida, Japan, Louisiana, Maryland, Mexico Northwest, New South Wales, New York, Norfolk Is., Oregon, Pennsylvania, Queensland, South Australia, South Carolina, Tasmania, Texas, Uruguay, Victoria, Western Australia

    Rostraria Trin. appears in other Kew resources:

    First published in Fund. Agrost.: 149 (1820)

    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 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