1. Family: Araceae Juss.
    1. Lasia Lour.

      1. This genus is accepted, and its native range is Tropical & Subtropical Asia.

    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    Diagnostic
    Clump-forming, evergreen helophytes; stem prickly, aerial, and scrambling to prostrate, internodes distinct, green; petiole prickly, weakly geniculate at apex; leaf blade usually pinnatifid, rarely sagittate or bipinnatifid, fine venation reticulate; spathe spirally twisted, erect, thickened, spongy, marcescent to deciduous; flowers bisexual, perigoniate, tepals free; berries shortly spiny to smooth at apex.
    Distribution
    Trop. & Subtrop. Asia.
    General Description
    HABIT : clump- and colony-forming evergreen herbs, stoloniferous, stem thick, aculeate or unarmed ( L. concinna), erect to decumbent, green, epigeal or submersed, internodes relatively long or short. LEAVES : several. PETIOLE : long, aculeate, weakly geniculate apically, sheath relatively short. BLADE : sagittate to hastate-sagittate when juvenile, adult blade deeply pinnatifid in anterior division, posterior divisions pedatifid, sometimes simple, adult blade rarely entire, or bipinnatifid ( L. concinna), major veins aculeate on lower surface; primary lateral veins pinnate in anterior division, pedate in posterior divisions, primary lateral veins of each pinna forming submarginal collective vein in pinnatifid leaves, or running into marginal vein in simple leaves, higher order venation reticulate. INFLORESCENCE : solitary. PEDUNCLE : subequal to petiole, aculeate as petiole. SPATHE : linear, very long and narrow (L. spinosa) or broader ( L. concinna), very thick and spongy, spirally twisted, marcescent or deciduous, basal part enclosing spadix, gaping at anthesis. SPADIX : shortly cylindric, obtuse, sessile. FLOWERS : bisexual, perigoniate; tepals usually 4, more rarely 6, fornicate. STAMENS : 4(-6), filaments free, broad, connective slender, thecae ellipsoid, dehiscing by longitudinal slit. POLLEN : monosulcate, ellipsoid, medium-sized (mean 27 µm.), exine reticulate, psilate along aperture margins. GYNOECIUM : ovoid to ellipsoid, ovary 1-locular, ovule 1, anatropous, funicle very short, placenta apical, stylar region well developed, shortly attenuate to cylindric, stigma discoid-hemispheric. BERRY : borne in cylindric infructescence, crowded, quadrangular, apically densely muricate to spinose or smooth, 1-seeded, green. SEED : large, compressed-obovoid, testa thin, brown, hard, somewhat rugose, embryo large, somewhat curved, endosperm present but only as a single cell layer.
    Habitat
    Tropical humid forest; helophytes, wet places in forest, open swamps, along streams, rice fields, tidal flats.

    Images

    Distribution

    Doubtfully present in:

    Maluku, Sulawesi

    Native to:

    Assam, Bangladesh, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Jawa, Laos, Malaya, Myanmar, Nepal, New Guinea, Sri Lanka, Sumatera, Taiwan, Thailand, Tibet, Vietnam

    Lasia Lour. appears in other Kew resources:

    First published in Fl. Cochinch.: 81 (1790)

    Accepted by

    • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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