- Family: Poaceae Barnhart
Leymus Hochst.
[GB]
nonem
- Morphology General Habit
- Perennial. Rhizomes absent (13), or short (12), or elongated (26). Culms erect (28/31), or geniculately ascending (8/31), or decumbent (1/31); robust (2/2); 10-69.4-350 cm long. Culm-internodes terete (1/1). Culm-nodes constricted (1/1). Lateral branches sparse (2/3), or fastigiate (1/3). Leaf-sheath auricles absent (41), or falcate (11). Ligule an eciliate membrane (48), or a ciliolate membrane (2). Leaf-blades filiform (1), or linear (49); herbaceous (14), or coriaceous (36); stiff (47), or firm (3). Leaf-blade apex muticous (48), or pungent (2).
- Morphology Reproductive morphology Inflorescences
- Inflorescence composed of racemes; exserted (49), or embraced at base by subtending leaf (1). Racemes single; erect (19), or ascending (30), or drooping (2); linear (48), or oblong (5); bilateral. Rhachis flattened (25/25). Spikelet packing broadside to rhachis; crowded (11), or contiguous (31), or lax (7), or distant (1); 2 -rowed (2/2). Rhachis internodes indefinite (24), or filiform (1), or linear (24), or oblong (1). Spikelets appressed (18/18); solitary (13), or in pairs (37), or in threes (19), or clustered at each node (6). Fertile spikelets sessile (45), or sessile and pedicelled (4), or pedicelled (3); 1 in the cluster (6/42), or 2 in the cluster (38/42), or 3 in the cluster (21/42), or 4 in the cluster (8/42), or 5 in the cluster (6/42), or 6 in the cluster (3/42), or 7-11 in the cluster (1/42).
- Morphology Reproductive morphology Inflorescences Spikelets
- Spikelets comprising 1-5-12 fertile florets; with diminished florets at the apex. Spikelets lanceolate (2), or elliptic (22), or oblong (27), or cuneate (1); laterally compressed; 6-14.91-32 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus glabrous (2/4), or pilose (2/4); base truncate (2/2). Rhachilla internodes glabrous (35), or sparsely hairy (1), or pubescent (13), or pilose (1). Floret callus glabrous (2/7), or sparsely hairy (1/7), or pubescent (3/7), or pilose (2/7).
- Fertile
- Spikelets comprising 1-5-12 fertile florets; with diminished florets at the apex. Spikelets lanceolate (2), or elliptic (22), or oblong (27), or cuneate (1); laterally compressed; 6-14.91-32 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus glabrous (2/4), or pilose (2/4); base truncate (2/2). Rhachilla internodes glabrous (35), or sparsely hairy (1), or pubescent (13), or pilose (1). Floret callus glabrous (2/7), or sparsely hairy (1/7), or pubescent (3/7), or pilose (2/7).
- Morphology Reproductive morphology Inflorescences Bracts Glume
- Glumes distichous (36), or collateral (14); persistent; shorter than spikelet (45/48), or reaching apex of florets (8/48), or exceeding apex of florets (3/48). Lower glume subulate (24), or linear (10), or lanceolate (20), or oblong (1); 0.5-0.9711-1 length of upper glume; chartaceous (2/36), or herbaceous (1/36), or coriaceous (33/36); without keels (1/11), or 1-keeled (10/11); 0 -veined (3/47), or 1 -veined (35/47), or 2 -veined (6/47), or 3 -veined (16/47), or 4-5 -veined (4/47), or 6-7 -veined (1/47). Lower glume lateral veins absent (27), or obscure (11), or distinct (17). Lower glume surface smooth (38), or asperulous (1), or scabrous (15); glabrous (43), or pubescent (7), or pilose (1), or villous (1). Lower glume apex acuminate (7/21), or attenuate (7/21), or setaceously attenuate (9/21); muticous (23/27), or awned (4/27). Upper glume subulate (24), or linear (10), or lanceolate (20), or oblong (1); 0.25-1.031-2 length of adjacent fertile lemma; chartaceous (2/36), or herbaceous (1/36), or coriaceous (33/36); with undifferentiated margins (42), or membranous margins (8); without keels (5/15), or 1-keeled (10/15); 0 -veined (2/47), or 1 -veined (36/47), or 2 -veined (6/47), or 3 -veined (15/47), or 4-5 -veined (4/47), or 6-7 -veined (1/47). Upper glume surface smooth (38), or scabrous (14); glabrous (43), or pubescent (7), or villous (1). Upper glume apex acuminate (6/21), or attenuate (7/21), or setaceously attenuate (9/21); muticous (23/27), or awned (4/27); 1 -awned (4/4).
- Morphology Reproductive morphology Flowers Florets
- Fertile lemma lanceolate (46), or elliptic (6), or oblong (4), or ovate (1); membranous (1), or chartaceous (10), or coriaceous (40); of similar consistency on margins (48), or much thinner on margins (2); without keel (39/47), or keeled (8/47); 5 -veined (45), or 6 -veined (7), or 7 -veined (12), or 8-9 -veined (2), or 10 -veined (1). Lemma lateral veins obscure (12/16), or distinct (2/16), or prominent (2/16); without ribs (49), or ribbed (1). Lemma surface smooth (45), or asperulous (2), or scaberulous (3), or scabrous (4); glabrous (27), or puberulous (7), or pubescent (13), or pilose (6), or villous (3). Lemma margins eciliate (40), or ciliate (7), or pubescent (4). Lemma apex entire (48), or dentate (2); 2 -fid (2/2); acute (22/46), or acuminate (23/46), or attenuate (2/46), or setaceously attenuate (1/46); muticous (21), or mucronate (9), or awned (32); 1 -awned (32/32). Principal lemma awn apical (36/37), or from a sinus (1/37). Palea 0.9-0.9882-1 length of lemma; 2 -veined (48/48). Palea keels smooth (43), or scaberulous (4), or scabrous (3); eciliate (30), or ciliolate (7), or ciliate (15). Palea surface glabrous (46), or pubescent (2), or pilose (2). Palea apex entire (1/4), or dentate (4/4). Apical sterile florets resembling fertile though underdeveloped.
- Morphology Reproductive morphology Flowers
- Lodicules 2 (13/13); membranous (13/13). Anthers 3 (30/30). Stigmas 2 (15/15). Ovary pubescent on apex (20/20).
- Morphology Reproductive morphology Fruits
- Caryopsis with adherent pericarp (23/23); fusiform (1/2), or ellipsoid (1/2); isodiametric (1/1); smooth (1/1); apex unappendaged (2/2). Embryo 0.2 length of caryopsis. Hilum linear (14/14); 0.9 length of caryopsis.
- Distribution
- Europe (7), or Temperate Asia (39), or Tropical Asia (1), or Australasia (3), or North America (11), or South America (2), or Antarctica (1).
Native to:
Afghanistan, Alaska, Alberta, Aleutian Is., Altay, Amur, Argentina Northwest, Argentina South, Arizona, Belarus, Belgium, British Columbia, Bulgaria, Buryatiya, California, Central European Rus, Chile Central, China North-Central, China South-Central, China Southeast, Chita, Colorado, Denmark, East European Russia, Finland, France, Føroyar, Germany, Great Britain, Greece, Greenland, Iceland, Idaho, Illinois, Inner Mongolia, Iran, Ireland, Irkutsk, Japan, Kamchatka, Kazakhstan, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Krym, Kuril Is., Labrador, Magadan, Maine, Manchuria, Manitoba, Massachusetts, Mexico Northeast, Mexico Northwest, Michigan, Minnesota, Mongolia, Montana, Nebraska, Nepal, Netherlands, Nevada, New Brunswick, New Hampshire, New Mexico, Newfoundland, North Caucasus, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ontario, Oregon, Pakistan, Pennsylvania, Primorye, Prince Edward I., Qinghai, Québec, Romania, Sakhalin, Saskatchewan, South Dakota, South European Russi, Spain, Sweden, Tadzhikistan, Texas, Tibet, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Ukraine, Utah, Uzbekistan, Washington, West Himalaya, West Siberia, Wisconsin, Wyoming, Xinjiang, Yakutskiya, Yukon
Introduced into:
Austria, Baltic States, Chatham Is., Chile South, Connecticut, Czechoslovakia, Falkland Is., Hawaii, Indiana, New York, New Zealand South, Tasmania, Victoria
- Leymus aemulans (Nevski) Tzvelev
- Leymus ajanensis (J.J.Vassil.) Tzvelev
- Leymus akmolinensis (Drobow) Tzvelev
- Leymus alaicus (Korsh.) Tzvelev
- Leymus altus D.F.Cui
- Leymus ambiguus (Vasey & Scribn.) D.R.Dewey
- Leymus angustus (Trin.) Pilg.
- Leymus arenarius (L.) Hochst.
- Leymus aristiglumis L.B.Cai
- Leymus × buriaticus Peschkova
- Leymus cappadocicus (Boiss. & Balansa) Melderis
- Leymus chinensis (Trin.) Tzvelev
- Leymus cinereus (Scribn. & Merr.) Á.Löve
- Leymus condensatus (J.Presl) Á.Löve
- Leymus crassiusculus L.B.Cai
- Leymus divaricatus (Drobow) Tzvelev
- Leymus duthiei (Stapf ex Hook.f.) C.Yen, J.L.Yang & B.R.Baum
- Leymus erianthus (Phil.) Dubc.
- Leymus × fedtschenkoi Tzvelev
- Leymus flavescens (Scribn. & J.G.Sm.) Pilg.
- Leymus flexilis (Nevski) Tzvelev
- Leymus flexus L.B.Cai
- Leymus golmudensis Y.H.Wu
- Leymus innovatus (Beal) Pilg.
- Leymus × jenisseiensis (Turcz.) Tzvelev
- Leymus karelinii (Turcz.) Tzvelev
- Leymus komarovii (Roshev.) J.L.Yang & C.Yen
- Leymus kopetdaghensis (Roshev.) Tzvelev
- Leymus lanatus (Korsh.) Tzvelev
- Leymus latiglumis Tzvelev
- Leymus leptostachyus L.B.Cai & X.Su
- Leymus mollis (Trin.) Pilg.
- Leymus multicaulis (Kar. & Kir.) Tzvelev
- Leymus × multiflorus (Gould) Barkworth & R.J.Atkins
- Leymus mundus L.B.Cai & X.Su
- Leymus nikitinii (Czopanov) Tzvelev
- Leymus obvipodus L.B.Cai
- Leymus ordensis Peschkova
- Leymus paboanus (Claus) Pilg.
- Leymus pacificus (Gould) D.R.Dewey
- Leymus paucispiculus L.B.Cai
- Leymus pendulus L.B.Cai
- Leymus pishanicus S.L.Lu & Y.H.Wu
- Leymus pluriflorus L.B.Cai & Tong L.Zhang
- Leymus pseudoracemosus C.Yen & J.L.Yang
- Leymus pubens H.X.Xiao
- Leymus pubinodis (Keng) Á.Löve
- Leymus racemosus (Lam.) Tzvelev
- Leymus × ramosoides Tzvelev
- Leymus ramosus (K.Richt.) Tzvelev
- Leymus ruoqiangensis S.L.Lu & Y.H.Wu
- Leymus salina (M.E.Jones) Á.Löve
- Leymus secalinus (Georgi) Tzvelev
- Leymus shanxiensis G.H.Zhu & S.L.Chen
- Leymus sibiricus (Trautv.) J.L.Yang & C.Yen
- Leymus × sphacelatus Peschkova
- Leymus spiniformis L.B.Cai & X.Su
- Leymus tianschanicus (Drobow) Tzvelev
- Leymus triticoides (Buckley) Pilg.
- Leymus × tuvinicus Peschkova
- Leymus × vancouverensis (Macoun ex Vasey) Pilg.
- Leymus villosissimus (Scribn.) Tzvelev
- Leymus yiunensis N.R.Cui & D.F.Cui
Leymus Hochst. appears in other Kew resources:
First published in Flora 31: 118 (1848)
Accepted by
- Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of 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 2021. 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 2021. 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