Trisetum Pers.
  • Syn. Pl. 1: 97 (1805) 


Notes: , nom. cons.

General Description

HABIT Perennial. Rhizomes absent (71), or short (9), or elongated (9). Stolons absent (81), or present (6). Culms erect (35/43), or geniculately ascending (19/43), or rambling (1/43); robust (3/12), or slender (8/12), or weak (1/12); 2-49.29-300 cm long; without nodal roots (1/1), or rooting from lower nodes (1/1). Culm-nodes constricted (3/3). Lateral branches lacking (7/8), or sparse (2/8), or ample (1/8). Ligule an eciliate membrane (73), or a ciliolate membrane (15). Leaf-blades filiform (5), or linear (82); herbaceous (85), or coriaceous (2); stiff (12), or firm (73), or flaccid (2). Leaf-blade midrib conspicuous (1/1). Leaf-blade margins unthickened (2/3), or cartilaginous (1/3). Leaf-blade apex muticous (86), or pungent (1). INFLORESCENCE Inflorescence a panicle; exserted, or embraced at base by subtending leaf (1). Panicle open (44/86), or contracted (27/86), or spiciform (21/86). Primary panicle branches not whorled (79), or whorled at most nodes (8). Spikelets appressed (2/2); solitary. Fertile spikelets pedicelled. Pedicels filiform (1/2), or oblong (1/2). FERTILE SPIKELETS Spikelets comprising 1 fertile florets (7), or 2 fertile florets (76), or 3 fertile florets (63), or 4 fertile florets (10), or 5 fertile florets (4), or 6 fertile florets (2); with a barren rhachilla extension (81), or with diminished florets at the apex (8). Spikelets lanceolate (1), or oblong (83), or cuneate (8); laterally compressed; 3-6.375-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (11/86), or sparsely hairy (4/86), or pubescent (25/86), or pilose (47/86), or villous (2/86). Floret callus glabrous (2/73), or pubescent (61/73), or pilose (7/73), or bearded (3/73); truncate (1), or obtuse (86). GLUMES Glumes persistent; shorter than spikelet (56), or reaching apex of florets (31), or exceeding apex of florets (9); thinner than fertile lemma (83), or similar to fertile lemma in texture (4), or firmer than fertile lemma (1); parallel to lemmas (9), or gaping (78). Lower glume linear (6), or lanceolate (63), or elliptic (14), or oblong (5), or ovate (4); 0.25-1.636-75 length of upper glume; hyaline (5), or membranous (82); 1-keeled (86/86); 1 -veined (66/78), or 2 -veined (7/78), or 3 -veined (19/78). Lower glume lateral veins absent (65), or obscure (6), or distinct (22). Lower glume surface smooth (85), or asperulous (1), or scabrous (1). Lower glume apex obtuse (1/86), or acute (62/86), or acuminate (22/86), or attenuate (1/86), or setaceously attenuate (6/86); muticous (85), or mucronate (2), or awned (1). Upper glume linear (1), or lanceolate (46), or elliptic (33), or oblong (7), or ovate (8), or obovate (1); 0.66-1.039-2.5 length of adjacent fertile lemma; hyaline (5), or membranous (82); with undifferentiated margins (77), or hyaline margins (10); 1-keeled (86/86); 1 -veined (2/79), or 2 -veined (1/79), or 3 -veined (77/79), or 4 -veined (2/79), or 5 -veined (3/79). Upper glume primary vein eciliate (84), or ciliolate (1), or ciliate (2). Upper glume surface smooth (85), or asperulous (1), or scabrous (1). Upper glume apex entire (86), or erose (1); obtuse (3/86), or acute (69/86), or acuminate (14/86), or setaceously attenuate (6/86); muticous (84), or mucronate (2), or awned (1); 1 -awned (1/1). FLORETS Fertile lemma lanceolate (19), or elliptic (32), or oblong (32), or ovate (3), or obovate (3); membranous (80), or chartaceous (4), or cartilaginous (3); of similar consistency above (73), or much thinner above (14); of similar consistency on margins (70), or much thinner on margins (17); without keel (5), or keeled (82); 3 -veined (2), or 5 -veined (85), or 6-7 -veined (1). Lemma midvein without distinctive roughness (81), or scaberulous (5), or scabrous (1); eciliate (86), or ciliate (1). Lemma lateral veins obscure (4/6), or prominent (2/6); excurrent (6/6), or extending close to apex (1/6). Lemma surface smooth (51), or asperulous (12), or scaberulous (11), or scabrous (8), or papillose (6); unwrinkled (86), or rugose (1); glabrous (75), or puberulous (2), or pubescent (7), or pilose (4), or hirsute (2). Lemma apex entire (7), or dentate (80), or lobed (1); 2 -fid (79/81), or 3 -fid (1/81), or 4 -fid (3/81); incised 0.15-0.24-0.33 of lemma length; obtuse (2/6), or acute (3/6), or acuminate (1/6), or setaceously attenuate (1/6); muticous (3), or mucronate (2), or awned (85); 1 -awned (70/85), or 3 -awned (14/85), or 5 -awned (1/85). Principal lemma awn subapical (3), or dorsal (84); straight (13), or curved (30), or flexuous (3), or geniculate (52); limb glabrous (85), or puberulous (1), or ciliate (1). Column of lemma awn glabrous (50/52), or puberulous (1/52), or pubescent (1/52). Lateral lemma awns shorter than principal (1/1). Palea embraced by lemma (7), or gaping (80); 0.5-0.8636-1 length of lemma; hyaline (82), or membranous (5). Palea keels smooth (49), or scaberulous (37), or scabrous (2); eciliate (77), or ciliolate (6), or ciliate (4). Palea surface glabrous (85), or pubescent (1), or pilose (1). Palea apex erose (1/3), or dentate (2/3); muticous (80), or with excurrent keel veins (7). Apical sterile florets resembling fertile though underdeveloped (6/8), or distinct from fertile (2/8). FLOWER Lodicules 2 (26/26); membranous (5/5); glabrous (24/26), or ciliate (3/26); entire (1/4), or 2-toothed (4/4); emarginate (1/2), or truncate (1/2). Anthers 3. Ovary glabrous (41/49), or with a few apical hairs (1/49), or pubescent on apex (7/49), or pubescent all over (1/49). FRUIT Caryopsis with adherent pericarp (78/78); linear (1/5), or fusiform (3/5), or oblong (1/5); apex rostrate (1/1). Embryo 0.2 length of caryopsis. Hilum punctiform (54/56), or elliptic (1/56), or linear (1/56). DISTRIBUTION Europe (19), or Africa (2), or Temperate Asia (24), or Tropical Asia (8), or Australasia (10), or Pacific (3), or North America (21), or South America (26), or Antarctica (1).

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Africa Macaronesia Azores
  • Northern Africa Algeria
  • Morocco
  • Tunisia
  • Antarctic Subantarctic Islands Falkland Is.
  • Asia-Temperate Caucasus North Caucasus
  • Transcaucasus
  • China China North-Central
  • China South-Central
  • China Southeast
  • Inner Mongolia
  • Manchuria
  • Qinghai
  • Tibet
  • Xinjiang
  • Eastern Asia Japan
  • Korea
  • Taiwan
  • Middle Asia Kazakhstan
  • Kirgizistan
  • Tadzhikistan
  • Turkmenistan
  • Uzbekistan
  • Mongolia Mongolia
  • Russian Far East Amur
  • Kamchatka
  • Khabarovsk
  • Kuril Is.
  • Magadan
  • Primorye
  • Sakhalin
  • Siberia Altay
  • Buryatiya
  • Chita
  • Irkutsk
  • Krasnoyarsk
  • Tuva
  • West Siberia
  • Yakutskiya
  • Western Asia Afghanistan
  • Iran
  • Iraq
  • Lebanon-Syria
  • Turkey
  • Asia-Tropical Indian Subcontinent East Himalaya
  • India
  • Nepal
  • Pakistan
  • West Himalaya
  • Malesia Borneo
  • Papuasia New Guinea
  • Australasia Australia New South Wales
  • Queensland
  • Tasmania
  • Victoria
  • New Zealand Antipodean Is.
  • Chatham Is.
  • New Zealand North
  • New Zealand South
  • Europe Eastern Europe Baltic States
  • Belarus
  • Central European Russia
  • East European Russia
  • Krym
  • North European Russia
  • Northwest European Russia
  • South European Russia
  • Ukraine
  • Middle Europe Austria
  • Belgium
  • Czechoslovakia
  • Germany
  • Hungary
  • Netherlands
  • Poland
  • Switzerland
  • Northern Europe Finland
  • Great Britain
  • Iceland
  • Ireland
  • Norway
  • Svalbard
  • Sweden
  • Southeastern Europe Albania
  • Bulgaria
  • Greece
  • Italy
  • Kriti
  • Romania
  • Sicilia
  • Turkey-in-Europe
  • Yugoslavia
  • Southwestern Europe Corse
  • France
  • Portugal
  • Sardegna
  • Spain
  • Northern America Eastern Canada Labrador
  • New Brunswick
  • Newfoundland
  • Nova Scotia
  • Ontario
  • Québec
  • Mexico Mexico Central
  • Mexico Gulf
  • Mexico Northeast
  • Mexico Northwest
  • Mexico Southeast
  • Mexico Southwest
  • North-Central U.S.A. Minnesota
  • South Dakota
  • Wisconsin
  • Northeastern U.S.A. Connecticut
  • Maine
  • Masachusettes
  • Michigan
  • New Hampshire
  • New York
  • Pennsylvania
  • Rhode I.
  • Vermont
  • Northwestern U.S.A. Colorado
  • Idaho
  • Montana
  • Oregon
  • Washington
  • Wyoming
  • South-Central U.S.A. New Mexico
  • Southeastern U.S.A. North Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. Arizona
  • California
  • Nevada
  • Utah
  • Subarctic America Alaska
  • Aleutian Is.
  • Greenland
  • Northwest Territories
  • Nunavut
  • Yukon
  • Western Canada Alberta
  • British Columbia
  • Manitoba
  • Saskatchewan
  • Pacific North-Central Pacific Hawaii
  • Southern America Brazil Brazil South
  • Brazil Southeast
  • Caribbean Dominican Republic
  • Haiti
  • Central America Costa Rica
  • Guatemala
  • Honduras
  • Panamá
  • Northern South America Venezuela
  • Southern South America Argentina Northeast
  • Argentina Northwest
  • Argentina South
  • Chile Central
  • Chile North
  • Chile South
  • Juan Fernández Is.
  • Western South America Bolivia
  • Colombia
  • Ecuador
  • Peru
Introduced into
  • Antarctic Subantarctic Islands Kerguelen
  • Northern America North-Central U.S.A. Kansas
  • Missouri
  • Oklahoma
  • Northeastern U.S.A. New Jersey
  • Southeastern U.S.A. Mississippi

Included Species

  Bibliography

  • 1 Govaerts, R.H.A. (2011). World checklist of selected plant families published update. Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

 Information From

GrassBase - The Online World Grass Flora
http://www.kew.org/data/grasses-db/
Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. http://www.kew.org/data/grasses-db.html. [accessed 24 January 2012; 14:30 GMT]
  • A © Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
  • C See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement.