1. Family: Poaceae Barnhart
    1. Dimeria R.Br.

      1. This genus is accepted, and its native range is Madagascar, S. Arabian Peninsula, Primorye to Tropical & Subtropical Asia, N. & NE. Australia to W. Pacific.

    [GB]

    nonem

    Habit
    Annual (44), or perennial (13). Stolons absent (55), or present (2). Culms erect (36/41), or geniculately ascending (12/41), or decumbent (5/41); slender (19/19); 5-32.25-120 cm long; without nodal roots (2/5), or rooting from lower nodes (5/5). Lateral branches lacking (9/16), or sparse (5/16), or ample (3/16). Leaves differentiated into sheath and blade (56), or without demarcation between sheath and blade (1). Ligule an eciliate membrane (18), or a ciliolate membrane (39). Leaf-blades linear (56), or lanceolate (16); stiff (2), or firm (52), or flaccid (3). Leaf-blade midrib evident (1/4), or conspicuous (3/4). Leaf-blade margins cartilaginous (3/3).
    Inflorescences
    Inflorescence composed of racemes; not deciduous as a whole (56), or deciduous as a whole (1); subtended by an unspecialized leaf-sheath (54), or an inflated leaf-sheath (3); exserted (56), or embraced at base by subtending leaf (1). Peduncle widened at apex (1/1). Racemes single (20), or paired (36), or digitate (16); side by side (42/43), or intertwined (1/43); appressed (1), or erect (5), or ascending (53); unilateral; bearing few fertile spikelets (1), or many spikelets (56); bearing 2-7 fertile spikelets on each (1/1). Rhachis persistent (42/43), or deciduous from axis (1/43); wingless (37), or narrowly winged (15), or broadly winged (5); flattened (28/48), or angular (17/48), or subterete (4/48). Spikelet packing crowded (43), or contiguous (11), or lax (3); 2 -rowed (52/52). Raceme-bases brief (56), or filiform (1); unequal (the longer measured) (1/1). Spikelets appressed (54/56), or ascending (1/56), or spreading (1/56); solitary. Fertile spikelets sessile (5), or pedicelled (52). Pedicels linear (1/50), or oblong (3/50), or clavate (2/50), or cuneate (31/50), or reduced to a stump (13/50).
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (2), or lanceolate (5), or elliptic (23), or oblong (29), or ovate (4), or obovate (1), or oblanceolate (2); laterally compressed; 1-4.618-12 mm long; persistent on plant (1), or falling entire (56). Spikelet callus brief (41), or square (7), or oblong (6), or cuneate (3); glabrous (1/49), or pubescent (31/49), or pilose (9/49), or bearded (10/49); base truncate (6/50), or obtuse (44/50), or acute (2/50), or pungent (1/50); attached obliquely (1/1).
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (2), or lanceolate (5), or elliptic (23), or oblong (29), or ovate (4), or obovate (1), or oblanceolate (2); laterally compressed; 1-4.618-12 mm long; persistent on plant (1), or falling entire (56). Spikelet callus brief (41), or square (7), or oblong (6), or cuneate (3); glabrous (1/49), or pubescent (31/49), or pilose (9/49), or bearded (10/49); base truncate (6/50), or obtuse (44/50), or acute (2/50), or pungent (1/50); attached obliquely (1/1).
    Glume
    Glumes shorter than spikelet (1), or reaching apex of florets (2), or exceeding apex of florets (54); firmer than fertile lemma; parallel to lemmas (56), or recurved at apex (1). Lower glume linear (18), or lanceolate (6), or elliptic (22), or oblong (24); chartaceous (10), or coriaceous (47); without keels (2), or 1-keeled (55); wingless (40), or winged on keel (17), or winged on margins (1); 1 -veined (2/16), or 3 -veined (14/16). Lower glume lateral veins absent (2), or distinct (55). Lower glume surface smooth (46), or asperulous (6), or scabrous (5); glabrous (43), or puberulous (1), or pubescent (9), or pilose (6). Lower glume apex emarginate (1/56), or obtuse (6/56), or acute (29/56), or acuminate (17/56), or attenuate (3/56), or setaceously attenuate (3/56); muticous (55), or mucronate (3). Upper glume lanceolate (13), or elliptic (37), or oblong (21), or ovate (3); 5.5-5.75-6 length of adjacent fertile lemma; chartaceous (8), or coriaceous (54); with undifferentiated margins (25), or hyaline margins (32); without keels (5), or 1-keeled (52); wingless (16), or winged on keel (42), or winged on margins (1); 1 -veined (3/18), or 3 -veined (15/18). Upper glume primary vein eciliate (25), or ciliolate (3), or ciliate (30). Upper glume surface smooth (48), or asperulous (5), or scabrous (3), or rugose (1); glabrous (39), or puberulous (1), or pubescent (4), or pilose (12), or hirsute (1), or villous (2), or hispid (1). Upper glume apex emarginate (1), or obtuse (4), or acute (28), or acuminate (25), or attenuate (3), or setaceously attenuate (2); muticous (48), or mucronate (2), or awned (7); 1 -awned (7/7).
    Florets
    Basal sterile florets barren (55/55); without significant palea (55/55). Lemma of lower sterile floret linear (2/54), or lanceolate (44/54), or elliptic (2/54), or oblong (9/54), or obovate (1/54); hyaline (54/54); 0 -veined (3/19), or 1 -veined (13/19), or 2 -veined (3/19); obtuse (2/9), or acute (7/9). Fertile lemma lanceolate (2), or elliptic (44), or oblong (9), or ovate (1), or obovate (1), or oblanceolate (3); hyaline (31/34), or membranous (2/34), or cartilaginous (1/34); without keel; 1 -veined (52/52). Lemma surface smooth (56), or papillose (1). Lemma margins eciliate (55), or ciliolate (2), or ciliate (1). Lemma apex entire (1), or dentate (56); 2 -fid (56/56); muticous (1), or mucronate (1), or awned (56); 1 -awned (56/56). Principal lemma awn apical (1), or from a sinus (56); straight (3), or curved (1), or geniculate (55); limb glabrous (56), or puberulous (1). Column of lemma awn glabrous (55/56), or puberulous (1/56). Palea present (11), or absent or minute (46); hyaline (3/11), or membranous (8/11); 0 -veined (1/1). Palea keels smooth (9/11), or tuberculate (2/11); eciliate (10/11), or ciliate (1/11). Palea surface glabrous (9/11), or pilose (2/11).
    Flowers
    Lodicules 2 (18/18); fleshy (1/1); glabrous (17/18), or ciliate (1/18); truncate (2/2). Anthers 2 (54/54). Stigmas 2 (1/1).
    Fruits
    Caryopsis with adherent pericarp (19/19); linear (2/18), or lanceolate (1/18), or ellipsoid (4/18), or oblong (14/18); isodiametric (1/3), or laterally compressed (2/3). Embryo 0.5 length of caryopsis. Hilum punctiform (2/2).
    Distribution
    Africa (3), or Temperate Asia (6), or Tropical Asia (49), or Australasia (3), or Pacific (3).

    Images

    Distribution

    Native to:

    Andaman Is., Assam, Bangladesh, Borneo, Cambodia, Caroline Is., China South-Central, China Southeast, India, Japan, Jawa, Korea, Laos, Lesser Sunda Is., Madagascar, Malaya, Marianas, Myanmar, Nansei-shoto, Nepal, New Guinea, Nicobar Is., Northern Territory, Oman, Philippines, Primorye, Queensland, Santa Cruz Is., Sri Lanka, Sulawesi, Sumatera, Taiwan, Thailand, Vietnam, West Himalaya, Western Australia

    Dimeria R.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Wallich, N. [Cat. no. 8839], Nepal K001128326
    Wallich, N. [Cat. no. 8840], Myanmar K001128328
    Wallich, N. [Cat. no. 8841], Nepal K001128329
    Gomez, W. [Cat. no. 8839], Myanmar K001128327
    s.coll. [Cat. no. 8839] K001128325

    First published in Prodr. Fl. Nov. Holland.: 204 (1810)

    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.

    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 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