1. Family: Araceae Juss.
    1. Genus: Apoballis Schott
      1. Apoballis ovata (Schott) S.Y.Wong & P.C.Boyce

        This species is accepted, and its native range is Sumatera.

    [CATE]

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

    Habitat
    Terrestrial on forest floor, sometimes locally very abundant (possibly with the decumbent branching stems forming clonal colonies),
    Distribution
    Malesia: endemic to Sumatera (North and West Sumatera).
    General Description
    Herb c. 15–30 cm tall. Stem to c. 40 cm long, decumbent to sprawling, pleionanthic, sometimes tinged deep red, c. 1–2 cm diam., with coarsely scabrid verruculate to rugose internodes. Leaves to c. 10 along the stem; petiole 9–18 cm long, scabrid-rugose abaxially at the base, the rest densely and minutely puberulent, sheathing in the lower ⅓–½ the wings of the sheath at first fully attached and tapering, then withering and partly deciduous, especially in the distal part; blade ovate to broadly ovate, dull dark green adaxially, paler abaxially, 8–17 cm long × 6–10 cm wide, the base obtuse to retuse, occasionally narrowly and shallowly cordate with posterior lobes to c. 1 cm long, the apex obtuse to acute, not at all acuminate, if obtuse then apiculate for c. 4 mm; midrib prominent abaxially, with 7–11 primary lateral veins on each side diverging at 45–60°; interprimary veins not differentiated, or very sporadic and hardly thicker than the secondary venation; secondary veins mostly arising from the midrib, some from near the bases of the primary veins in the lower part of the leaf; tertiary venation obscure. Inflorescence solitary; peduncle not or hardly exserted from the subtending leaf base, c. 3 cm long. Spathe 4.5–6 cm long, thick and spongy; lower spathe narrowly ovoid, c. 2–2.5 cm long, differentiated from the limb by a weak constriction; limb 2–2.5 cm long, oblong-lanceolate, not much opening, withering after anthesis and then deciduous, whitish. Spadix 3.5–4.5 cm long, subcylindric; female zone 1–1.3 cm long, obliquely inserted, subcylindric, c. 3 mm diam.; pistils more or less crowded, subcylindric-bottle-shaped, c. 0.7 mm diam.; stigma sessile, discoid, papillate, somewhat narrower than the ovary; interpistillar staminodes in 1–2 irregular whorls around the base of the female zone, shorter than and about the same diameter as the ovaries, more or less flat-topped, recurring in 1–4 very irregular whorls at the top of the female zone marking the base of the interstice; sterile interstice somewhat attenuate, 0.8–1.2 cm long, naked but for scattered groups of small sessile staminodes resembling sterile anthers; male zone somewhat thicker than the interstice, subcylindric, c. 1.4 cm long × 3 mm thick; stamens crowded, truncate, more or less dumbbell-shaped, c. 0.5 mm across; appendix much reduced, sometimes merely a terminal cluster of staminodes, or up to c. 4 mm long and conic, the base isodiametric with the top of the male zone; staminodes of appendix irregularly polygonal, more or less flat-topped, c. 0.7 mm diam. Fruiting peduncle somewhat declinate, not much further exserted than at flowering; fruiting spathe broadly urceolate, to 3 cm long.
    Diagnostic
    It differs in having rough internodes and puberulous, longer petioles, and interpistillar staminodes confined to each end of the female zone.
    [CATE]

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

    Distribution

    Malesia: endemic to Sumatera (North and West Sumatera).

    General Description

    Herb c. 15-30 cm tall. Stem to c. 40 cm long, decumbent to sprawling, pleionanthic, sometimes tinged deep red, c. 1-2 cm diam., with coarsely scabrid verruculate to rugose internodes. Leaves to c. 10 along the stem; petiole 9-18 cm long, scabrid-rugose abaxially at the base, the rest densely and minutely puberulent, sheathing in the lower ?-1/2 the wings of the sheath at first fully attached and tapering, then withering and partly deciduous, especially in the distal part; blade ovate to broadly ovate, dull dark green adaxially, paler abaxially, 8-17 cm long × 6-10 cm wide, the base obtuse to retuse, occasionally narrowly and shallowly cordate with posterior lobes to c. 1 cm long, the apex obtuse to acute, not at all acuminate, if obtuse then apiculate for c. 4 mm; midrib prominent abaxially, with 7-11 primary lateral veins on each side diverging at 45-60°; interprimary veins not differentiated, or very sporadic and hardly thicker than the secondary venation; secondary veins mostly arising from the midrib, some from near the bases of the primary veins in the lower part of the leaf; tertiary venation obscure. Inflorescence solitary; peduncle not or hardly exserted from the subtending leaf base, c. 3 cm long. Spathe 4.5-6 cm long, thick and spongy; lower spathe narrowly ovoid, c. 2-2.5 cm long, differentiated from the limb by a weak constriction; limb 2-2.5 cm long, oblong-lanceolate, not much opening, withering after anthesis and then deciduous, whitish. Spadix 3.5-4.5 cm long, subcylindric; female zone 1-1.3 cm long, obliquely inserted, subcylindric, c. 3 mm diam.; pistils more or less crowded, subcylindric-bottle-shaped, c. 0.7 mm diam.; stigma sessile, discoid, papillate, somewhat narrower than the ovary; interpistillar staminodes in 1-2 irregular whorls around the base of the female zone, shorter than and about the same diameter as the ovaries, more or less flat-topped, recurring in 1-4 very irregular whorls at the top of the female zone marking the base of the interstice; sterile interstice somewhat attenuate, 0.8-1.2 cm long, naked but for scattered groups of small sessile staminodes resembling sterile anthers; male zone somewhat thicker than the interstice, subcylindric, c. 1.4 cm long × 3 mm thick; stamens crowded, truncate, more or less dumbbell-shaped, c. 0.5 mm across; appendix much reduced, sometimes merely a terminal cluster of staminodes, or up to c. 4 mm long and conic, the base isodiametric with the top of the male zone; staminodes of appendix irregularly polygonal, more or less flat-topped, c. 0.7 mm diam. Fruiting peduncle somewhat declinate, not much further exserted than at flowering; fruiting spathe broadly urceolate, to 3 cm long.

    Habitat

    Terrestrial on forest floor, sometimes locally very abundant (possibly with the decumbent branching stems forming clonal colonies), c. 500-1200 m alt.

    Distribution

    Native to:

    Sumatera

    Apoballis ovata (Schott) S.Y.Wong & P.C.Boyce appears in other Kew resources:

    First published in Bot. Stud. (Taipei) 51: 254 (2010)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Literature

    CATE Araceae
    • Hay, A. & Yuzammi 2000. Schismatoglottideae (Araceae) in Malesia: 1. Schismatoglottis. Telopea. 9 (1): 1-177

    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