1. Family: Araceae Juss.
    1. Helicodiceros Schott

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

    [CATE]

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

    Distribution
    WC. Medit.
    Habitat
    Warm temperate habitats; geophytes, in limestone and granite rock crevices beside the sea, rarely on stony ground.
    General Description
    HABIT : seasonally dormant herbs, tuber depressed-globose. LEAVES : several. PETIOLE : variously spotted, sheath long, forming loose pseudostem. BLADE : deeply pedatifid, anterior division oblong, lobes of posterior divisions tightly spiralled on basal ribs and thus held ± erect; primary lateral veins of each lobe pinnate, weakly differentiated, forming submarginal collective vein, higher order venation reticulate. INFLORESCENCE : solitary, appearing with leaves. PEDUNCLE : much shorter than petiole. SPATHE : spotted on outer surface, constricted between tube and blade, tube with convolute margins, erect, green, thick, subcylindric, blade sharply bent backwards at constriction, large, oblong-ovate, widely spreading, pale purple, inner surface covered with long, purple hairs. SPADIX : shorter than spathe, bent backwards at spathe constriction, female zone sessile to shortly stipitate, subcylindric, sterile zone separating male and female zones short, covered with subulate pistillodes or naked, male zone subcylindric to ellipsoid, shorter than or subequal to female, appendix vermiform, much longer than rest of spadix, weakly stipitate, thicker at middle, attenuate towards apex and base, ± lying on spathe blade, entirely covered with upwardly curved, setiform staminodial processes becoming gradually larger and subulate towards appendix base. FLOWERS : unisexual, perigone absent. MALE FLOWER : 2-3-androus, anthers sessile, connective slender, inconspicuous, thecae ± ellipsoid, dehiscing by broad apical slit. POLLEN : extruded in strands, inaperturate, ± spherical, exine spinose. FEMALE FLOWER : ovary 1-locular, ovules up to 6, orthotropous, placentae 2, apical placenta with 3-4 ovules and basal placenta with 1-2 ovules, stylar region as broad or broader than ovary, stigma subhemispheric. BERRY : obovoid to ellipsoid, bearing small stigma remnant, (1-)2-3-seeded, orange. SEED : borne on either one or both placentae, broadly ovoid, with yellowish strophiole, testa leathery, strongly reticulate, pale brown when fresh, embryo axile, elongate, endosperm copious.
    Diagnostic
    Seasonally dormant tuberous geophytes; leaf blade with reticulate fine venation; spathe inner surface covered with hairs; flowers unisexual, without perigone. Differs from Theriophonum and Dracunculus in the spadix appendix covered with subulate to bristle-like sterile flowers and pedatifid leaf blades with lobes twisting upwards on each side and held erect. Further differs from Dracunculus in the spadix male zone separated from female zone by subulate to filiform sterile organs.

    Distribution

    Native to:

    Baleares, Corse, Sardegna

    Helicodiceros Schott appears in other Kew resources:

    First published in Index Seminum (B, Berolinensis) 1855(App.): 2 (1855)

    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