1. Family: Poaceae Barnhart
    1. Streptostachys Desv.

      1. This genus is accepted, and its native range is Trinidad to N. South america and NE. Brazil.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (2), or short (4), or elongated (1). Culms erect (4/4); robust (3/3); 35-115.2-200 cm long; without nodal roots (1/1), or rooting from lower nodes (1/1). Culm-internodes terete (2/3), or elliptical in section (1/3). Culm-nodes swollen (1/1). Lateral branches lacking (1/1). Ligule a ciliate membrane (1), or a fringe of hairs (6), or absent (3). Leaf-blade base without a false petiole (6), or with a brief petiole-like connection to sheath (1). Leaf-blades linear (2), or lanceolate (6), or ovate (1); stiff (2), or firm (5). Leaf-blade midrib indistinct (1/1). Leaf-blade apex muticous (6), or pungent (1).
    Inflorescences
    Inflorescence a panicle (5), or composed of racemes (2). Panicle open (5/5). Primary panicle branches not whorled (4/5), or whorled at lower nodes (2/5), or whorled at most nodes (1/5). Racemes digitate (1/2), or borne along a central axis (1/2). Rhachis angular (1/1). Spikelet packing contiguous (1/2), or distant (1/2). Spikelets solitary (3), or in pairs (4). Fertile spikelets sessile and pedicelled (2), or pedicelled (5); 2 in the cluster (2/2). Pedicels free (6), or with the longest adnate below to rhachis (1); linear (2/6), or oblong (3/6), or clavate (2/6); tip discoid (1/1).
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or elliptic (4), or oblong (1), or ovate (2); dorsally compressed; 3.5-6.255-9.3 mm long; falling entire. Spikelet callus brief (1), or square (4), or toroidal (2); free from lower glume (2), or incorporating lowest rhachilla internode with adnate lower glume (5), or supplemented by thickened base of upper glume (4). Rhachilla internodes brief up to lowest fertile floret (1), or elongated between glumes (6), or elongated below basal sterile floret (5). Rhachilla elongation stout (5/5).
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate (1), or elliptic (4), or oblong (1), or ovate (2); dorsally compressed; 3.5-6.255-9.3 mm long; falling entire. Spikelet callus brief (1), or square (4), or toroidal (2); free from lower glume (2), or incorporating lowest rhachilla internode with adnate lower glume (5), or supplemented by thickened base of upper glume (4). Rhachilla internodes brief up to lowest fertile floret (1), or elongated between glumes (6), or elongated below basal sterile floret (5). Rhachilla elongation stout (5/5).
    Glume
    Glumes one the lower absent or obscure (1), or two (6); shorter than spikelet (5), or reaching apex of florets (1), or exceeding apex of florets (1); thinner than fertile lemma, or similar to fertile lemma in texture (1). Lower glume lanceolate (1/6), or ovate (5/6); clasping (1/1); membranous (6/6); without keels (6/6); 1-2 -veined (1/6), or 3 -veined (4/6), or 4 -veined (2/6), or 5 -veined (4/6). Lower glume lateral veins absent (1/6), or distinct (6/6). Lower glume surface glabrous (3/6), or pubescent (2/6), or pilose (1/6). Lower glume apex acute (6/6). Upper glume lanceolate (1), or elliptic (1), or ovate (5); membranous (6), or coriaceous (1); without keels; 5 -veined (6), or 6 -veined (2), or 7 -veined (3). Upper glume lateral veins transversely connected at apex (2/2); parallel at apex (1/1). Upper glume surface glabrous (2), or puberulous (2), or pubescent (2), or pilose (1), or hispidulous (1). Upper glume apex obtuse (3/5), or acute (3/5), or acuminate (1/5).
    Florets
    Basal sterile florets male (6), or barren (4); with palea (6), or without significant palea (1). Lemma of lower sterile floret elliptic (1), or ovate (6); membranous (6), or coriaceous (2); 3-4 -veined (2), or 5 -veined (6), or 6 -veined (1), or 7 -veined (2); obtuse (1/5), or acute (4/5). Fertile lemma elliptic (3), or ovate (5); indurate; without keel; 5 -veined (3/3). Lemma surface smooth (3), or scaberulous (1), or papillose (4); glabrous (5), or pubescent (2). Lemma margins involute. Lemma apex obtuse (3/3); without ornament (5), or pubescent (2). Palea 1 length of lemma; indurate; without keels.
    Flowers
    Lodicules 2 (5/5); fleshy (4/4); truncate (1/1). Anthers 3 (1/1).
    Fruits
    Caryopsis with adherent pericarp; ellipsoid (4/5), or oblong (1/5); dorsally compressed (4/4); plano-convex (1/1). Embryo 0.4 length of caryopsis. Hilum linear (5/5); 1 length of caryopsis.
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Brazil Northeast, French Guiana, Guyana, Suriname, Trinidad-Tobago, Venezuela

    Streptostachys Desv. appears in other Kew resources:

    First published in Nouv. Bull. Sci. Soc. Philom. Paris 2: 190 (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

    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