1. Family: Araceae Juss.
    1. Genus: Apoballis Schott
      1. Apoballis hastifolia (Hallier f. ex Engl.) S.Y.Wong & P.C.Boyce

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

    [CATE]

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

    General Description
    Herb to ?70 cm tall. Stem epigeal, erect to decumbent, at least 20 cm long, 3 cm diam., with internodes c. 1.5 cm long, probably pleionanthic (renewal not observable on available material); petiole 40–55 cm long, sheathing in the lower ¼–⅓, minutely and rather sparsely pubescent; wings of sheath fully attached, tapering, ?persistent; blade narrowly triangular-sagittate, 27–34 cm long × 10–13 cm wide across the tips of the posterior lobes, the base deeply divided into two acute triangular posterior lobes 5–10 cm long, the apex acute and acuminate for c. 1 cm; midrib prominent abaxially (dry), minutely and densely pubescent abaxially especially in the distal part, with c. 11 primary lateral veins on each side, alternating with lesser but robust interprimaries and diverging at rather erratic angles between 45° and 90°, the nexus of primary veins of the posterior lobes more or less forming posterior costae; secondary venation abaxially conspicuous, arising from the midrib and from the primary veins; tertiary venation obscure. Inflorescences 2 (?or more) together; peduncle c. 10 cm long, slender. Spathe 8.5 cm long, thick and spongy; lower spathe broadly ovoid, 1.5 cm long, differentiated from the limb by an abrupt constriction; limb 7 cm long, oblonglanceolate, apiculate for 1 cm, deciduous. Spadix c. 7 cm long, subcylindric; female zone 1 cm long, obliquely inserted, not adnate to spathe, cylindric, 2 mm thick (dry); pistils crowded, subglobose, c. 0.3 cm diam.; stigma sessile, discoid, papillate, slightly narrower than the ovary; interpistillar staminodes few among the pistils through most of the female zone, a concentration at the base of the female zone, robust, more or less globular, subsessile, c. 0.5 mm diam and slightly higher than the pistils (drying translucent yellow); interstice 8 mm long, slightly narrower than either fertile zone, mostly naked with a concentration of interpistillar staminodes at the base, distally with few increasingly distant small groups of interpistillar staminodes, apically with 2 very irregular whorls of enlarged sterile anthers c. 0.7 mm diam.; male zone cylindric 1.3 cm long, 3 mm diam. (dry); stamens crowded, truncate, weakly dumbbell-shaped (almost rectangular), with the connective thick but not or hardly exceeding the thecae, c. 0.5 mm across; appendix subcylindric-tapering, apically acute, 3 cm long, basally slightly wider than the male zone, c. 4 mm diam.; staminodes of appendix flat-topped, irregularly polygonal, c. 1 mm diam. Fruiting peduncle slightly elongating, declinate. Fruiting spathe broadly ovoid-urceolate, 4 cm long.
    Distribution
    Malesia: endemic to Sumatera (North Sumatera); known only from the epitype locality.
    Habitat
    Unknown.
    [CATE]

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

    Distribution

    Malesia: endemic to Sumatera (North Sumatera); known only from the epitype locality.

    General Description

    Herb to ?70 cm tall. Stem epigeal, erect to decumbent, at least 20 cm long, 3 cm diam., with internodes c. 1.5 cm long, probably pleionanthic (renewal not observable on available material); petiole 40-55 cm long, sheathing in the lower ¼-?, minutely and rather sparsely pubescent; wings of sheath fully attached, tapering, ?persistent; blade narrowly triangular-sagittate, 27-34 cm long × 10-13 cm wide across the tips of the posterior lobes, the base deeply divided into two acute triangular posterior lobes 5-10 cm long, the apex acute and acuminate for c. 1 cm; midrib prominent abaxially (dry), minutely and densely pubescent abaxially especially in the distal part, with c. 11 primary lateral veins on each side, alternating with lesser but robust interprimaries and diverging at rather erratic angles between 45° and 90°, the nexus of primary veins of the posterior lobes more or less forming posterior costae; secondary venation abaxially conspicuous, arising from the midrib and from the primary veins; tertiary venation obscure. Inflorescences 2 (?or more) together; peduncle c. 10 cm long, slender. Spathe 8.5 cm long, thick and spongy; lower spathe broadly ovoid, 1.5 cm long, differentiated from the limb by an abrupt constriction; limb 7 cm long, oblong-lanceolate, apiculate for 1 cm, deciduous. Spadix c. 7 cm long, subcylindric; female zone 1 cm long, obliquely inserted, not adnate to spathe, cylindric, 2 mm thick (dry); pistils crowded, subglobose, c. 0.3 cm diam.; stigma sessile, discoid, papillate, slightly narrower than the ovary; interpistillar staminodes few among the pistils through most of the female zone, a concentration at the base of the female zone, robust, more or less globular, subsessile, c. 0.5 mm diam and slightly higher than the pistils (drying translucent yellow); interstice 8 mm long, slightly narrower than either fertile zone, mostly naked with a concentration of interpistillar staminodes at the base, distally with few increasingly distant small groups of interpistillar staminodes, apically with 2 very irregular whorls of enlarged sterile anthers c. 0.7 mm diam.; male zone cylindric 1.3 cm long, 3 mm diam. (dry); stamens crowded, truncate, weakly dumbbell-shaped (almost rectangular), with the connective thick but not or hardly exceeding the thecae, c. 0.5 mm across; appendix subcylindric-tapering, apically acute, 3 cm long, basally slightly wider than the male zone, c. 4 mm diam.; staminodes of appendix flat-topped, irregularly polygonal, c. 1 mm diam. Fruiting peduncle slightly elongating, declinate. Fruiting spathe broadly ovoid-urceolate, 4 cm long.

    Habitat

    Unknown.

    Distribution

    Native to:

    Sumatera

    Apoballis hastifolia (Hallier f. ex Engl.) S.Y.Wong & P.C.Boyce appears in other Kew resources:

    First published in Bot. Stud. (Taipei) 51: 253 (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