1. Family: Araceae Juss.
    1. Genus: Anthurium Schott
      1. Anthurium alstonii Croat

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

    [CPLC]

    Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

    Distribution
    Endémica y nativa en Colombia; Alt. 50 - 320 m.; Pacífico.
    Habit
    Hierba
    Conservation
    No Evaluada
    [CATE]

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

    General Description
    Terrestrial plant, caudex elongated with adventitious roots; internodes c. 1.5 cm diam.; cataphylls 13–20 cm long, 3 cm wide at base when unfolded. Leaves with petiole green, sulcate at base, terete toward apex, geniculate, 48–61 cm long, c. 8 mm diam. at base, 3–4 mm diam. at top; geniculum 2–2.5 cm long, concolorous with petiole; blade broadly ovate-cordate, wider below the middle and triangular in the upper half, shortly acuminate at apex, 30–47 cm long, 20–27 cm wide, averaging 36 × 23 cm, c. 1.5 × longer than wide, c. 0.65 × as long as petiole, metallic green and matte above, pale green and moderately glossy below; sinus somewhere between parabolic and arcuate; midrib narrowly raised and concolorous above, prominently round-raised and lighter below; primary lateral veins 11–14 pairs, arising at 30–40° angle, narrowly raised and concolorous above, round-raised below, concolorous with midrib; tertiary veins prominulous; collective veins generally arising from the 2nd–4th pair of basal veins, 2–4 mm from margin; basal veins (2–)4–5 pairs, all free to the base. Inflorescences erect; peduncle terete, much thinner and shorter than petioles, 13–25 cm long, c. 2 mm diam.; spathe membranaceous, linear-lanceolate and acuminate, clasping the base of the stipe, 5–11 cm long, 0.8–1 cm wide, light green or green; spadix stipitate for 7–15 mm, cylindrical, 6–16 cm long, 4–10 mm diam., white or cream. Flowers 1.3–1.6 mm long, 1.3–1.4 mm wide, 5–6 visible per spiral; tepals pale manilla, moderately smooth with thick pale granular inclusions, lateral tepals 0.8–0.9 mm wide, outer margins 2–3-sided, inner margins broadly rounded.
    Diagnostic
    The species is a member of Anthurium sect. Cardiolonchium and is characterised by its long internodes, its ovate-subcordate leaves with the upper surface matte and the lower surface moderately glossy with prominulous tertiary venation, its 11–14 pairs of narrowly raised primary lateral veins, its light green or green spathe and its shortpedunculate, long-stipitate, white to cream spadix.

    The species is most closely related to Anthurium suramaense Croat (described elsewhere in this paper) from Chocó Province on Cerro Torrá at 1000–1150 m, which differs in having blades rounded at the base and proportionately more elongated (1.7–2.3 × longer than wide in A. suramaense versus 1.5 × longer than wide in A. alstonii) and by its yellow spadix that is usually 29–33 × longer than broad (rather than usually white or cream and 12.8–16.7 × longer than broad in A. alstonii). In addition, the flowers of A. suramaense are 2.3–2.5 mm long on drying (versus 1.4–1.6 mm long in A. alstonii).

    Anthurium alstonii is also closely related to A. silanchense Croat & J. Rodríguez from Pichincha Province in Ecuador at 800 m elevation, which shares very similar leaves with ovate-subcordate blades, but that species differs in having a short and stubby green spadix rather than a white or cream, long-tapered spadix as in A. alstonii.

    The Lucid key to Anthurium keys out this species to A. wallisii Mast. and A. chorense Engl., but both of these species differ in having blades much more elongated. In the case of A. wallisii the blades are narrowly oblongovate-sagittate and 2.5 × longer than broad with a deep, ± hippocrepiform sinus. In the case of A. chorense, which apparently has no existing type specimen, Engler refers to the blade as being elongate-oblong-cordate and he compares the species with A. crassivenium Engl., which has blades 1.8 × longer than broad. A. chorense also differs in having only 4 pairs of primary lateral veins  (versus 11–14 pairs in A. alstonii).
    Habitat
    Tropical rain forest life zone.
    Distribution
    Endemic to Colombia, known only from Nariño Department in the vicinity of Barbacoas.

    Distribution

    Native to:

    Colombia

    Anthurium alstonii Croat appears in other Kew resources:

    First published in Willdenowia 40: 66 (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
    • Croat, T.B., Delannay, X. & Kostelac, C. 2010. New species of Araceae from Colombia. Willdenowia, 40 (1), 63-122.

    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

    Catálogo de Plantas y Líquenes de Colombia
    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