1. Family: Poaceae Barnhart
    1. Thaumastochloa C.E.Hubb.

      1. This genus is accepted, and its native range is Maluku to N. Australia.

    [GB]

    nonem

    Habit
    Annual. Culms geniculately ascending (1/1), or decumbent (1/1); 7-29.31-70 cm long; rooting from lower nodes (1/1). Lateral branches ample (1/1). Ligule a ciliolate membrane. Leaf-blade margins cartilaginous (1/1).
    Inflorescences
    Inflorescence composed of racemes; terminal and axillary; not deciduous as a whole (7), or deciduous as a whole (2); subtended by a spatheole; embraced at base by subtending leaf. Spatheole linear; herbaceous (1/1). Peduncle widened at apex; disarticulating. Racemes single; linear (7), or moniliform (1); unilateral; bearing few fertile spikelets (4), or many spikelets (4); bearing 1 fertile spikelets on each (3), or 2-8 fertile spikelets on each (4), or 9 fertile spikelets on each (2), or 10 fertile spikelets on each (1). Rhachis tough (2), or fragile but the lowest internode fused to peduncle (7); subcylindrical and excavated; terminating in a sterile spikelet. Spikelet packing abaxial; 1 -rowed (2/6), or 2 -rowed (5/6). Rhachis internodes oblong (7), or inflated (1). Rhachis internode tip transverse (6), or oblique (4); crateriform. Spikelets sunken; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels fused to internode.
    Sterile
    Companion sterile spikelets represented by barren pedicels.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong (3), or ovate (5); dorsally compressed; 1.6-2.837-4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous (7/7); base truncate; simple (2), or with central boss (2), or with central peg (4); attached transversely (6), or attached obliquely (4). Companion sterile spikelets represented by barren pedicels.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong (3), or ovate (5); dorsally compressed; 1.6-2.837-4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous (7/7); base truncate; simple (2), or with central boss (2), or with central peg (4); attached transversely (6), or attached obliquely (4).
    Glume
    Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume oblong (3), or ovate (5); indurate; 2-keeled; 5-6 -veined (1), or 7 -veined (6), or 8 -veined (1), or 9 -veined (3), or 10 -veined (1). Lower glume lateral veins without ribs (7), or ribbed (2). Lower glume surface convex (6), or flat (4), or concave (1); smooth (6), or rugose (2), or cancellate (1), or areolate (1). Lower glume apex obtuse (3), or acute (5). Upper glume elliptic; coriaceous; with hyaline margins; without keels; 5 -veined (1/1).
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret ovate (1/1); hyaline; 2 -veined (1/1); obtuse (1/1). Fertile lemma ovate (1/1); hyaline; without keel; 0 -veined (3), or 1 -veined (2), or 2 -veined (7), or 3 -veined (1). Lemma margins eciliate (7), or ciliolate (1). Lemma apex obtuse (1/1). Palea 0.9 length of lemma; hyaline (7), or membranous (1); 0-2 -veined (1/1); without keels (1), or 2-keeled (7).
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp (1/1); ovoid (1/1).
    Distribution
    Tropical Asia (3), or Australasia.

    Images

    Distribution

    Native to:

    Maluku, New Guinea, Northern Territory, Queensland, Western Australia

    Thaumastochloa C.E.Hubb. appears in other Kew resources:

    First published in Hooker's Icon. Pl. 34: t. 3313-3314 (1936)

    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