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  1. Family: Araceae Juss.
    1. Genus: Adelonema Schott
      1. Adelonema allenii (Croat) S.Y.Wong & Croat

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


    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.


    CATE Araceae, 17 Dec 2011.


    Homalomena erythropus ssp. allenii ranges from Costa Rica to Colombia. In Central America it ranges from San Jose province in central Costa Rica east along the Pacific Ocean to the Osa Peninsula, and along the Atlantic slope to Colombia.

    General Description

    Terrestrial to 40 cm high; internodes short, (.8)1-1.5 cm diam.; sap aromatic, weakly anise-scented; cataphylls 7-9 cm long, medium green, but darker than lamina; LEAVES with petioles (5)13-30 cm long, elliptic to bluntly or acutely C-shaped in cross-section (the margins sometimes reddish), 8-10 x 5-7 mm diam., laterally compressed, semiglossy, medium green, pinkish toward base, adaxial surface narrowly and shallowly sulcate, the margins obtuse; sheaths 4-10 cm long, well developed, auriculate and unequal at apex; blades subcoriaceous, elliptic to oblong-ovate, (13)20-35 em long, (4)10-16 cm wide, 1.8-3.4 times longer than wide, inequilateral, 4-10 mm wider on one side; apex abruptly to gradually acuminate, sometimes almost rounded; base obtuse to rounded, sometimes inequilateral, surfaces usually matte; adaxial surface medium green and concolorous, sparingly to heavily marked with irregular yellowish to grayish green or whitish spots; abaxial surface lighter colored, sometimes semiglossy; midrib slightly sulcate, strongly raised (in dried material) above, narrowly convex beneath; primary lateral veins mostly (8)10-12 per side, weakly sunken above, weakly raised below, scarcely more prominent than interprimary veins; interprimary veins visible, somewhat darker than surface, somewhat raised; tertiary veins visible and darker than surface below. INFLORESCENCES with peduncles rounded on one side, obtusely triangular on the other side, 7-14 cm long, 0.5-1.3 cm diam., darker medium green; spathe 8-12 cm long, the tube 1.6-2.5(3.5) cm wide, outer surface brownish green to greenish white to cream with light pinkish cast, the inner surface shiny whitish cream colored; the tube usually pale green; the blade greenish :white outside, white inside but glossier, sometimes tinged somewhat pinkish throughout or in part, sometimes with small reddish spots; spadix 6.5-11.5 cm long; pistillate section 1.5-2.5 cm long, 0.4-1 em in diameter, yellowish white, adnate adaxially to the spathe for 0.7-1.5 cm; staminate section 3.7-6 cm long, 3-10 mm diam. at base, narrowing toward the top to 3-5 mm diam., cream to light pinkish colored; pistillate section with ovary slightly obovoid, cream to whitish with faint yellowish green tint, 1.5-2.9 mm long, (8)1-1.5 mm wide at the broadest point; pistils greenish, bilocular; ovules many per locule, semi-orthotropous; stigma sessile, 4-lobed, discoid, ca. 1.5 mm diam., light yellowish or tan; staminodes absent; sterile staminate section with flowers capitate, white turning lavender, 2-3 mm long, ca. 1.8 mm diam., elliptical-elongate; staminate portion 3.7-6 cm long, 4-6 mm diam.; flowers cream, very light yellow in middle; staminate flowers consisting of (3)4(5) stamens, ellipsoid-rhombic in view from above, 2-3 mm long, 1-1.8 mm wide, distal flowers smaller; stamens truncate, surface irregularly rhomboidal, 0.9-1.9 mm long, 0.4-0.5 mm wide, ca. 1-1.9 mm high, thecae lateral, elliptical to oblong, 0.7-0.8 mm diam., opening by apical pore; pollen ellipsoidal, ca. 25 micron long, 15 mm wide, exine psilate. INFRUCTESCENCE reclining, berries numerous, cylindrical, 4-5 mm long, ca. 2 mm diam., whitish with very light greenish tint, 0.8-1 mm long, 0.6-0.7 mm diam., testa ribbed whitish.


    It occurs in Tropical wet forest (bmh-T), frequently along streams, from 20-900 m elevation.


    Native to:

    Colombia, Costa Rica


    Other Data

    Adelonema allenii (Croat) S.Y.Wong & Croat appears in other Kew resources:


    First published in Syst. Bot. 41: 37 (2016)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.


    Kew Backbone Distributions

    • Idárraga-Piedrahita, A., Ortiz, R.D.C., Callejas Posada, R. & Merello, M. (eds.) (2011). Flora de Antioquia: Catálogo de las Plantas Vasculares 2: 1-939. Universidad de Antioquia, Medellín.


    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.

    Catálogo de Plantas y Líquenes de Colombia

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.