1. Family: Araceae Juss.
    1. Genus: Apoballis Schott
      1. Apoballis longicaulis (Ridl.) 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

    Habitat
    Reported from disturbed lowland rainforest along valley bottoms and from a dry stream bed;
    Distribution
    Malesia: endemic to Sumatera (North Sumatera, Lampung).
    General Description
    Herb to c. 15 cm tall. Stem repent, branching, to c. 30 cm long, c. 1 cm diam., with internodes to 2 cm long, pleionanthic. Leaves c. 4 clustered at the end of the shoot; petiole to c. 6–14 cm long, sheathing in the lower c. 1⁄5‒⅓, faintly alate on the adaxial side between the sheath and the lamina; wings of sheath fully attached, persistent, broad and apically obtuse; blade more or less ovate, 6–11 cm long × 3–4.5 cm wide, the base obtuse to very slightly cordate with the posterior lobes c. 3 mm long and 1 cm wide, the apex acute to slightly acuminate, somewhat coriaceous, slightly glossy; midrib flush with the lamina adaxially, prominent abaxially, with 6–9 primary lateral veins on each side, alternating with interprimaries (these rather obscure in the fresh state), diverging at 60–80°; secondary venation arising mostly from the midrib, some from the lower parts of the lower primary veins; tertiary venation obscure. Inflorescence solitary; peduncle c. 4 cm long, upturned to bring the inflorescence erect on the repent stem. Spathe 3.5–6.5 cm long; lower spathe c. 1–2 cm long, green, very broadly ovoid, distally tapering sharply into the limb but not constricted; limb oblong-lanceolate 2.5–4 cm long, apiculate, whitish to yellowish, barely opening — gaping slightly at anthesis then clasping the spadix and persistent until falling with spent parts of spadix enclosed. Spadix sessile, 3–5.5 cm long, subcylindric; female zone obliquely inserted, 1–1.2 cm long, slightly conoid, c. 5 mm diam. at the top; pistils crowded, more or less cylindric, c. 0.5 mm diam.; stigma sessile, button-like, about as wide as the ovary, papillate; interpistillar staminodes absent from among the pistils, confined to one or two incomplete rings at the top and bottom of the female zone, stalked, clavate, more or less flat-topped, about the height and diameter of the pistils; interstice 0.5–1.5 cm long, cylindric, about the thickness of the female zone but slightly and abruptly attenuate at junction with fertile zones, almost completely naked but for few, scattered small groups of staminodes about half the size of the interpistillar staminodes, stalked near the base of the interstice, distally sessile and impressed; male zone 1–1.7 cm long, cylindric, 4 mm diam.; stamens crowded, truncate, dumbbell-shaped with the thecae somewhat elevated above and spread apart by the broad connective, c. 1 mm across; appendix slightly to distinctly shorter than the male zone, c. 0.5–1.4 cm long, basally isodiametric with male zone, tapering to an acute tip; staminodes of appendix flattopped, irregularly polygonal, c. 0.7 mm across.
    Diagnostic
    This species appears to be most closely allied to S. okadae. It differs in the leaves with more numerous more spreading primary veins, the larger inflorescence with a much broader lower spathe and female zone of the spadix, a short but nevertheless much longer appendix and the stamens with the connective rather dilated, spreading the thecae apart.
    [CATE]

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

    Distribution

    Malesia: endemic to Sumatera (North Sumatera, Lampung).

    General Description

    Herb to c. 15 cm tall. Stem repent, branching, to c. 30 cm long, c. 1 cm diam., with internodes to 2 cm long, pleionanthic. Leaves c. 4 clustered at the end of the shoot; petiole to c. 6-14 cm long, sheathing in the lower c. 1/5??, faintly alate on the adaxial side between the sheath and the lamina; wings of sheath fully attached, persistent, broad and apically obtuse; blade more or less ovate, 6-11 cm long × 3-4.5 cm wide, the base obtuse to very slightly cordate with the posterior lobes c. 3 mm long and 1 cm wide, the apex acute to slightly acuminate, somewhat coriaceous, slightly glossy; midrib flush with the lamina adaxially, prominent abaxially, with 6-9 primary lateral veins on each side, alternating with interprimaries (these rather obscure in the fresh state), diverging at 60-80°; secondary venation arising mostly from the midrib, some from the lower parts of the lower primary veins; tertiary venation obscure. Inflorescence solitary; peduncle c. 4 cm long, upturned to bring the inflorescence erect on the repent stem. Spathe 3.5-6.5 cm long; lower spathe c. 1-2 cm long, green, very broadly ovoid, distally tapering sharply into the limb but not constricted; limb oblong-lanceolate 2.5-4 cm long, apiculate, whitish to yellowish, barely opening - gaping slightly at anthesis then clasping the spadix and persistent until falling with spent parts of spadix enclosed. Spadix sessile, 3-5.5 cm long, subcylindric; female zone obliquely inserted, 1-1.2 cm long, slightly conoid, c. 5 mm diam. at the top; pistils crowded, more or less cylindric, c. 0.5 mm diam.; stigma sessile, button-like, about as wide as the ovary, papillate; interpistillar staminodes absent from among the pistils, confined to one or two incomplete rings at the top and bottom of the female zone, stalked, clavate, more or less flat-topped, about the height and diameter of the pistils; interstice 0.5-1.5 cm long, cylindric, about the thickness of the female zone but slightly and abruptly attenuate at junction with fertile zones, almost completely naked but for few, scattered small groups of staminodes about half the size of the interpistillar staminodes, stalked near the base of the interstice, distally sessile and impressed; male zone 1-1.7 cm long, cylindric, 4 mm diam.; stamens crowded, truncate, dumbbell-shaped with the thecae somewhat elevated above and spread apart by the broad connective, c. 1 mm across; appendix slightly to distinctly shorter than the male zone, c. 0.5-1.4 cm long, basally isodiametric with male zone, tapering to an acute tip; staminodes of appendix flat-topped, irregularly polygonal, c. 0.7 mm across.

    Habitat

    Reported from disturbed lowland rainforest along valley bottoms and from a dry stream bed; altitude not recorded except for Forbes’ specimen at c. 160 m.

    Distribution

    Native to:

    Sumatera

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

    Date Reference Identified As Barcode Type Status
    Dec 1, 1999 Rodd, A. [32], Indonesia Schismatoglottis longicaulis 71291.000

    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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    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