1. Family: Araceae Juss.
    1. Phymatarum M.Hotta

      1. This genus is accepted, and its native range is Borneo.

    [CATE]

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

    Distribution
    Borneo.
    General Description
    HABIT : small evergreen herbs, stem creeping to decumbent. LEAVES : several. PETIOLE : sheath fairly short with long marcescent ligule. BLADE : narrowly elliptic, somewhat coriaceous, apex with tubular mucro; primary lateral veins pinnate, running into conspicuous marginal vein, secondary and tertiary laterals parallel-pinnate, higher order venation inconspicuously transverse-reticulate. INFLORESCENCE : solitary. PEDUNCLE : erect, shorter or subequal to petiole. SPATHE : constricted between tube and blade, tube convolute, persistent, green, blade longer, boat-shaped and gaping at anthesis, whitish, cuspidate, caducous after anthesis. SPADIX : extreme base bearing a few sterile flowers or not, female zone conoid to subcylindric, basally adnate to spathe, separated from male zone by cylindric to ellipsoid zone of sterile male flowers, male zone very short and slightly narrower, appendix much longer, elongate-conoid, bearing sterile male flowers. FLOWERS : unisexual, perigone absent. MALE FLOWER : apparently 1-androus, free, filament short, connective inconspicuous, thecae tuberculate, ending in curved horn, dehiscing by apical pore. STERILE FLOWERS : subprismatic, tuberculate, flattened or excavated, lowermost either with or without central, short, subulate projection, uppermost more slender, relatively longer, otherwise similar but never with projections. POLLEN : inaperturate, ellipsoid, small (mean 19 µm., range 17-22 µm.) exine psilate. FEMALE FLOWER : gynoecium depressed-globose, ovary 1-locular, ovules many, hemiorthotropous, funicle long, placenta basal, stigma sessile, slightly concave centrally, much narrower than ovary, very thinly discoid. BERRY : many-seeded, depressed-obovoid, slightly furrowed, greenish-white. SEED : ellipsoid, with long micropylar appendage, testa costate, embryo elongate, straight, endosperm copious.
    Habitat
    Tropical humid forest; rheophytes.
    Diagnostic
    Small rheophytes, stem creeping or decumbent; petiole sheath with a long marcescent ligule; leaf blade apex with tubular mucro; spathe blade falling after anthesis; flowers unisexual, perigone absent; thecae of each anther with horn- or needle-like projections. Differs from Bucephalandra and Aridarum in constricted spathe. Further differs from Bucephalandra in densely tuberculate male flowers and subprismatic (not broad and flattened) sterile flowers between male and female flowers . Differs from Aridarum in stigma smaller than ovary, upper part of the spadix sterile with distinct appendix of hornless sterile flowers and stamens never excavated apically.

    Distribution

    Phymatarum M.Hotta appears in other Kew resources:

    First published in Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol. 32(1): 29 (1965)

    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