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

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


    CATE Araceae, 17 Dec 2011.


    Anthurium riojaense is endemic to Peru, known only from the type locality in San Martin Department, Rioja Province at 1,800 m in a Montane rain forest life zone or Lower montane wet forest life zone.

    General Description

    Hemiepiphytic climber; internodes 4.5 cm long, 6 mm diam., drying dark brownish grey, finely granulated, pale inclusions rarely dispersed; cataphylls 5.9 cm long, 7 mm wide, lightly dispersed-pale-lineate, abmptly acuminate at apex; petioles 25.2-37.5 cm long, 3-4 mm wide, drying dark-brownish yellow, D-shaped with 3 ridges adaxially; geniculum 15-17 mm long, 3-4 mm wide, drying dark brown, finely many-ribbed, moderately smooth; blades 26.3-34.3 cm long, 18.8-23.4 cm wide, 1.43 times longer than broad, sub-trilobate, abruptly acuminate at apex, deeply lobed at base, subcoriaceous, weakly bicolorous, drying weakly glossy, medium brown above, grayish yellow-brown below; upper surface moderately smooth, densely pale-lineate; lower surface moderately smooth, less prominent-densely pale-lineate; anterior lobe 17.4-25.4 cm long, 7.8-13.3 cm wide, abruptly concave near base, the constricted area 5.8-7.6 cm wide; posterior lobes 8.4-10.2 cm long, 8.0-9.4 cm wide, rounded at apex, 4.6-6.7 cm across the confluent area (from petiolar plexus to inner edge of confluence); concave toward base; basal veins 5-6 pairs, 15t pair free to base, 2nd fused 5-14 mm, yd fused 17-27 mm, 4th-6th fused 36-42 mm; posterior rib naked 16-26 mm; midrib narrowly rounded to bluntly acute, darker above, broadly rounded, minutely granular, pale-lineate, drying slightly darker than surface below; primary lateral veins 5-6 on both sides, arising at 50-53°, narrowly round-raised, bluntly acute, minutely granular; tertiary veins obscure above, slightly raised below; collective veins arising from 2nd-3rd primary lateral vein, 3-6 mm from margin. INFLORESCENCES erect; peduncle 11.2-14.5 cm long, 1-2 mm wide; spathe green, 5.8-8.6 cm long, 9-14 mm wide, 6.3 times longer than broad, abmptly acute at apex, erect-spreading, hooding spadix, slightly curved, green, drying yellowish brown; spadix 6.4-7 cm long, drying 4-5 mm diam., 13 times longer than broad, stipitate 4-5 mm, yellow, with slight aroma at anthesis; flowers 6 visible per spiral, 1.5-1.6 mm long, 1.4-1.5 mm wide, weakly 4-lobed; tepa Is minutely granular with pale inclusions, lateral tepals .4-.6 mm wide, inner margins rounded, outer margins 4-sided; stamens held in a contiguous cluster around stigma at level of tepals; anthers .5 mm long, .4 wide; thecae parallel.


    Other Data

    Anthurium riojaense Croat appears in other Kew resources:


    First published in Aroideana 34: 60 (2011)

    Accepted by

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


    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.

    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.