Trisetaria Forssk.

This genus is accepted, and its native range is Canary Islands, Alps, Medit. to Central Asia and Indian Subcontinent.

[GB]

nonem

Morphology General Habit
Annual. Culms erect (12/12), or geniculately ascending (10/12); slender (1/1); 4-23.82-80 cm long. Lateral branches lacking (1/1), or sparse (1/1). Ligule an eciliate membrane (15), or a ciliolate membrane (1). Leaf-blades linear (15), or lanceolate (1). Leaf-blade midrib conspicuous (2/2).
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by an unspecialized leaf-sheath (15), or an inflated leaf-sheath (2); exserted (14), or embraced at base by subtending leaf (2). Panicle open (2), or contracted (8), or spiciform (6), or capitate (1). Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong (4/4).
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets (2), or 2 fertile florets (11), or 3 fertile florets (6), or 4-5 fertile florets (3); with a barren rhachilla extension (11), or with diminished florets at the apex (5). Spikelets oblong (5), or cuneate (13); laterally compressed; 2-4.657-7.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (6/15), or pubescent (6/15), or pilose (3/15), or villous (2/15). Floret callus glabrous (5/10), or pubescent (5/10).
Fertile
Spikelets comprising 1 fertile florets (2), or 2 fertile florets (11), or 3 fertile florets (6), or 4-5 fertile florets (3); with a barren rhachilla extension (11), or with diminished florets at the apex (5). Spikelets oblong (5), or cuneate (13); laterally compressed; 2-4.657-7.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (6/15), or pubescent (6/15), or pilose (3/15), or villous (2/15). Floret callus glabrous (5/10), or pubescent (5/10).
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet (4), or reaching apex of florets (2), or exceeding apex of florets (11); thinner than fertile lemma (11), or similar to fertile lemma in texture (4), or firmer than fertile lemma (1); parallel to lemmas (1), or gaping (15). Lower glume linear (5), or lanceolate (10), or elliptic (1), or oblong (2), or ovate (1); 0.5-0.8781-1 length of upper glume; hyaline (3), or membranous (11), or chartaceous (1), or cartilaginous (1); without keels (1), or 1-keeled (15); 1 -veined (10), or 2 -veined (2), or 3 -veined (7). Lower glume lateral veins absent (9), or distinct (6), or unequally thickened (1); without ribs (6/7), or ribbed (1/7). Lower glume surface smooth (14), or asperulous (2); glabrous (13), or puberulous (1), or pubescent (1), or pilose (1), or villous (1), or setose (1). Lower glume apex obtuse (1), or acute (3), or acuminate (11), or attenuate (3); muticous (13), or mucronate (3), or awned (2). Upper glume lanceolate (12), or elliptic (2), or oblong (2), or ovate (2); 0.8-1.287-2 length of adjacent fertile lemma; hyaline (3), or membranous (11), or chartaceous (1), or cartilaginous (1); with undifferentiated margins (15), or hyaline margins (1); 1-keeled; 3 -veined. Upper glume primary vein eciliate (15), or pectinately ciliate (1). Upper glume lateral veins without ribs (15), or ribbed (1). Upper glume surface smooth (14), or asperulous (2); glabrous (13), or puberulous (1), or pilose (2), or villous (1), or setose (1). Upper glume apex entire, or dentate (1); 2 -fid (1/1); obtuse (1), or acute (3), or acuminate (12), or attenuate (2); muticous (12), or mucronate (3), or awned (3); 1 -awned (3/3).
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate (11), or elliptic (1), or oblong (3), or obovate (2); membranous (14), or cartilaginous (2); of similar consistency on margins (14), or much thinner on margins (2); without keel (12), or keeled (4); 3 -veined (4), or 4 -veined (1), or 5 -veined (13). Lemma midvein without distinctive roughness (11), or scaberulous (4), or scabrous (1). Lemma lateral veins obscure (3/3). Lemma surface smooth (13), or asperulous (1), or scaberulous (1), or scabrous (1), or punctate (1); glabrous (14), or pubescent (4), or villous (1). Lemma margins eciliate (15), or ciliolate (1), or pubescent (1). Lemma apex entire (2), or dentate (12), or lobed (2); 2 -fid (14/14); incised 0.25-0.29-0.33 of lemma length; acute (1/3), or acuminate (2/3); mucronate (1), or awned; 1 -awned (6), or 3 -awned (10). Principal lemma awn apical (1), or subapical (3), or from a sinus (1), or dorsal (11); straight (5), or curved (3), or geniculate (12). Lateral lemma awns shorter than principal (9/9). Palea gaping; 0.66-0.7675-1 length of lemma; hyaline. Palea keels smooth (5), or scaberulous (5), or scabrous (6). Palea apex dentate (6/7), or lobed (1/7); muticous (15), or with excurrent keel veins (1), or awned (1). Apical sterile florets resembling fertile though underdeveloped (3/5), or distinct from fertile (2/5).
Morphology Reproductive morphology Flowers
Lodicules 2 (7/7); membranous (6/6). Anthers 3. Ovary glabrous (15/15).
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp (15/15); lanceolate (1/2), or fusiform (1/2); laterally compressed (1/1); concavo-convex (1/1). Embryo 0.1-0.1312-0.15 length of caryopsis. Hilum punctiform (15/15).
Distribution
Europe (10), or Africa (9), or Temperate Asia (6), or Tropical Asia (1).

Native to:

Afghanistan, Albania, Algeria, Baleares, Canary Is., Corse, Cyprus, Egypt, France, Greece, India, Iran, Iraq, Italy, Kazakhstan, Kirgizstan, Kuwait, Lebanon-Syria, Libya, Morocco, North Caucasus, Pakistan, Palestine, Portugal, Sardegna, Saudi Arabia, Sicilia, Sinai, South European Russi, Spain, Switzerland, Tadzhikistan, Transcaucasus, Tunisia, Turkey, Turkey-in-Europe, Turkmenistan, Uzbekistan, West Himalaya, Yugoslavia

Introduced into:

Austria, Great Britain, New Jersey

Trisetaria Forssk. appears in other Kew resources:

First published in Fl. Aegypt.-Arab.: 27 (1775)

Accepted by

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

  • 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 2022. 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 2022. 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