dcsimg
Image of tropical panicgrass
Life » » Plants » » True grasses »

Tropical Panicgrass

Panicum trichoides Sw.

Morphology

    Description
    provided by eFloras
    Annual, delicate. Culms geniculately ascending, rooting from lower nodes, 10–80 cm tall, branched, nodes puberulous. Leaves cauline; leaf sheaths striate, pilose or hispid; leaf blades lanceolate, membranous, 3–8 × 0.5–2 cm, pilose, base asymmetrically cordate or narrowed, apex acuminate; ligule ca. 0.2 mm, a ciliolate membrane. Panicle ovate or oblong in outline, 4–20 cm, much branched; branches fine and bearing the spikelets on long pedicels. Spikelets asymmetrically ovate, 1–1.5 mm, pubescent; lower glume ovate, 1/2 length of spikelet, 1–3-veined, separated by an internode; upper glume as long as spikelet, 3–5-veined; lower lemma similar to upper glume, palea 1/2 as long as lemma; upper floret as long as spikelet, thinly coriaceous, glabrous, white, granulose. Fl. and fr. Sep–Dec. 2n = 18.
    license
    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of China Vol. 22: 505, 508 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of China @ eFloras.org
    editor
    Wu Zhengyi, Peter H. Raven & Hong Deyuan
    project
    eFloras.org
    original
    visit source
    partner site
    eFloras
    ID
    242402
    Physical Description
    provided by USDA PLANTS text
    Annuals, Terrestrial, not aquatic, Stems nodes swollen or brittle, Stems geniculate, decumbent, or lax, sometimes rooting at nodes, Stems caespitose, tufted, or clustered, Stems terete, round in cross section, or polygonal, Stems branching above base or distally at nodes, Stem nodes bearded or hairy, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostly open, or loose, Leaf sheath hairy, hispid or prickly, Leaf sheath and blade differentiated, Leaf blades lanceolate, Leaf blades ovate, Leaf blades 2-10 mm wide, Leaf blades 1-2 cm wide, Leaf blades mostly flat, Leaf blades more or less hairy, Ligule present, Ligule a fringed, ciliate, or lobed membrane, Inflorescence terminal, Inflorescence an open panicle, openly paniculate, branches spreading, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescen ce branches more than 10 to numerous, Flowers bisexual, Spikelets pedicellate, Spikelets dorsally compressed or terete, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets with 2 florets, Spikelet with 1 fertile floret and 1-2 sterile florets, Spikelets solitary at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating below the glumes, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes distinctly unequal, Glumes equal to or longer than adjacent lemma, Glume equal to or longer than spikelet, Glumes 3 nerved, Glumes 4-7 nerved, Lemma similar in texture to glumes, Lemma 5-7 nerved, Lemma glabrous, Lemma rugose, with cross wrinkles, or roughened, Lemma apex truncate, rounded, or obtuse, Lemma awnless, Lemma margins inrolled, tightly covering palea and caryopsis, Lemma straight, Palea present, well developed, Palea about equal to lemma, Stamens 3, Styles 2-fid, deeply 2-branched , Stigmas 2, Fruit - caryopsis, Caryopsis ellipsoid, longitudinally grooved, hilum long-linear.
    license
    cc-by-nc-sa-3.0
    compiler
    Dr. David Bogler
    source
    Missouri Botanical Garden
    source
    USDA NRCS NPDC
    original
    visit source
    partner site
    USDA PLANTS text
    ID
    PATR4_Panicum_trichoides_USDA_keys_object

Habitat

    Habitat & Distribution
    provided by eFloras
    Roadsides, waste places. Guangdong, Hainan [tropical America; introduced in tropical Africa and Asia].
    license
    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of China Vol. 22: 505, 508 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of China @ eFloras.org
    editor
    Wu Zhengyi, Peter H. Raven & Hong Deyuan
    project
    eFloras.org
    original
    visit source
    partner site
    eFloras
    ID
    246272