1. Family: Araceae Juss.
    1. Genus: Anthurium Schott
      1. Anthurium rionegrense Matuda

        This species is accepted, and its native range is Mexico (E. Oaxaca to W. Chiapas).

    [CATE]

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

    Distribution

    The locality where Anthurium rionegrense was rediscovered is located between Quebrada Chamarra and Rio Negro, very near the border of Chiapas and Oaxaca states, in Municipio Cintalapa, nearly midway between Felipe Angeles and Caly Mayor, located 38 Km NW of Cintalapa, Chiapas. In this area the species is relatively abundant and occurs with Anthurium schlechtendalii Kunth. A second population of A. rionegrense is located near the town of Emiliano Zapata, approximately 12 km NW of Cintalapa, Chiapas, along the highway between Cintalapa and Ejido Nuevo San Juan. At this locality the species is abundant and populations have both juvenile and adult plants.

    General Description

    Plants rupicolous; stems 5.5-26 em long, 1.5-3 em diam., pale brown, often branching and these giving rise to other individual plants; roots beige, 4.2-8.9 mm diam.; cataphylls narrowly triangular, pinkish when fresh, drying brown and fibrous, 2.3-4.6 cm long, 1.5-2.5 cm wide; LEAVES 1-5; petioles terete, 30-73 cm long, 4.4-7.2 mm diam., light green with whitish punctations; geniculum 1-4 cm long, thicker than the petiole; blades subcoriaceous, cordate-ovate to sub-reniform, dark green and matte-subvelvety adaxially, pale green and weakly pruinose abaxially, gradually acuminate at apex, 21-38.5 cm long, 18.6-30 cm wide; anterior lobe 14.2-23 cm long, posterior lobes 7-15.5 cm long, 6-8 cm wide, turned inward, sometimes overlapping, broadly rounded at apex; sinus hippocrepiform to closed and obovate, obtuse at the apex; major veins moderately paler than surface; midrib convex on both surfaces; primary lateral veins 2-4 pairs, departing midrib at 50° angle; collective veins arising from the first pair of basal veins, 6-10 mm from margin; basal veins 4-7 pairs, broadly arcuate toward the apex beyond the middle, the first pair free to the base, the remainder variously coalesced, the 4th and higher pairs coalesced to 4.7-6 cm; posterior rib curved, naked along the sinus 3-3.5 cm. INFLORESCENCE erect-spreading, longer than leaves; peduncle cylindric, light green with pale short lineations throughout, 39.5-74.5 cm long, 2.7-7.5 mm diam.; spathe linear-lanceolate, spreading, twisted, olive-green, 4.8-10.9 cm long, 1.2-2 cm wide, broadest toward the base and narrower toward the apex; spadix long-tapered, sessile, olive-green, 5.5-13 cm long, 5.4-8.8 mm diam. at the base, 3.6-4.1 mm diam. at apex; flowers rhombic, drying 3 mm long, 2.5 mm wide; outer tepals broadly triangular, the inner margin straight, convex on drying. INFRUCTESCENCE green when immature, orange when mature, erect in early fruit, pendent when mature, 6.5-18 cm long, 1.9-3.3 cm diam.; spathe persistent, pale green; berries orange, semiglossy, 7.3-15.4 mm long, 6.5-10.5 mm wide; seeds 2 per berry, 4.4-8 mm long, 3.5-6.7 mm wide, broadly rounded at apex.

    Habitat

    At the type locality, A. rionegrense occurs on granitic rocks in the forest understory of "bosque tropical subcaducifolio" (semideciduous tropical forest) (Rzedowski, 1978) near Quebrada Chamarra. This type of vegetation is dominated by: Bursera simaruba (L.) Sarg., Randia sp., Croton aff. pseudoniveus, Luhea candida (DC.) Martius., Trichilia hirta L., Comocladia sp., Stemmadenia donnell-smithii (Rose) Woodson, Thevetia ovata (Cav.) A. DC., Yucca elephantipes Regel, Plumeria rubra L., Pseudobombax ellipticum (H.B.K.) Dugand, Spondias purpurea L., Antburium schlechtendalii Kunth, Adiantum concinnum Willd., and Costus spicatus (Jacq) Sw. At the second locality where A. rionegrense was found, it occurs on sandstone in a dry stream bed in disturbed vegetation classified as "bosque tropical caducifolio" (deciduous tropical forest) dominated by Lubea candida (DC.) Martius, Bursera simaruba (L.) Sarg, Tabebuia sp., Haematoxylon brasiletto Karst, Randia sp., Capparis sp, Spondias purpurea L., Solanum sp., Croton aff. pseudoniveus, Anthurium scblechtendalii Kunth, Pilosocereus sp., Comocladia sp., Tillandsia flabellata Baker and Opuntia puverula Pf. So far, it is known that A. rionegrense ranges from 500 to 650 m and is restricted to the mountainous region north of Cintalapa, Chiapas. But, it is possible that the species might also occur in the mountains to the east of Chimalapas, Oaxaca as well.

    Though the species is known from "bosque tropical caducifolio" (deciduous tropical forest) and "bosque tropical subcaducifolio" (sernideciduous tropical forest) it may also occur in "bosque de Quercus" (Quercus forest) and "bosque tropical perennifolio" (evergreen tropical rain forest). These forest types are in neighboring regions where this species might also be present, however this information has not been confirmed.

    Distribution

    Native to:

    Mexico Southeast, Mexico Southwest

    Anthurium rionegrense Matuda appears in other Kew resources:

    First published in Anales Inst. Biol. Univ. Nac. México 36: 109 (1966)

    Accepted by

    • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

    Literature

    CATE Araceae
    • Melendez-Lopez, E., Perez-Farrera, M.A. & Croat, T.B. Additional Notes on Anthurium rionegrense Matuda: Morphology, Habitat and Distribution. Aroideana; Journal of the International Aroid Society 26, 15 (2003).

    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