1. Family: Araceae Juss.
    1. Gearum N.E.Br.

      1. This genus is accepted, and its native range is Central Brazil.

    [CATE]

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

    General Description
    HABIT : seasonally dormant, tuberous herbs with aromatic exudate when cut. LEAF : solitary. PETIOLE : sheath distinct, about half length of petiole. BLADE : subpalmatifid, lobes 5, central 3 lobes broader, elliptic, cuspidate, basal 2 narrower, lanceolate; primary lateral veins of each lobe forming submarginal collective vein on each side, higher order venation reticulate. INFLORESCENCE : solitary. PEDUNCLE : very short, much shorter than petiole. SPATHE : erect, slightly constricted, purplish, tube subcylindric, convolute, blade erect, gaping, oblong, cuspidate. SPADIX : shorter than spathe, fertile to apex, female zone shorter than male and separated from it by a sterile zone of synandrodes. FLOWERS : unisexual, perigone absent. MALE FLOWER : 4-androus, consisting of very shallow, subrhombic, truncate, subpeltate synandrium, thecae ± remote, situated near margin of synandrium, globose to oblong-ellipsoid, dehiscing by apical pore or occasionally by an oblique slit. POLLEN : ellipsoid, inaperturate, large (mean 56µm, range 52-60 µm), exine smooth (psilate) to scabrous-granulate. STERILE MALE FLOWERS : composed of irregularly elongated, shallow, truncate synandrodes. FEMALE FLOWER : densely crowded, gynoecium surrounded by usually 4 staminodes, staminodes laterally compressed, thick, rounded to obovoid, ovary subglobose, 3-4-locular, ovules 1 per locule, orthotropous, rather elongate, placenta axile at base of septum, stigma ± discoid, slightly (3-)4-lobed. BERRY : unknown. SEED : unknown.
    Habitat
    Tropical open herbaceous vegetation (“campo cerrado”); geophytes in low-lying sites prone to periodic flooding.
    Diagnostic
    Seasonally dormant tuberous geophytes; peduncle very short. much shorter than petiole; flowers unisexual, perigone absent; male flower a truncate synandrium; female flowers surrounded by a whorl of free staminodes; ovules orthotropous. Differs from Gorgonidium and Synandrospadix in having pedatisect or subpalmatifid leaf blade, styles and synandria short and squat or synandria very flat, staminodes in female flowers thick, obovoid or subtrapezoid.
    Distribution
    C. Brazil.

    Images

    Distribution

    Native to:

    Brazil North, Brazil West-Central

    Gearum N.E.Br. appears in other Kew resources:

    First published in J. Bot. 20: 196 (1882)

    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