Monstera membranacea Madison

First published in Contr. Gray Herb. 207: 55 (1977)
This species is accepted
The native range of this species is Costa Rica to W. Panama. It is a climber and grows primarily in the wet tropical biome.

Descriptions

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

Diagnostic

This is a very distinctive, easily recognized species. It possesses at least four characters unique in the genus; the lamina is very thin and membranaceous, somewhat bullate in live material; the spathe is decurrent on the peduncle for 3 – 8 cm; the fruit is green with the stylar portion deciduous to expose the seeds in a bright orange pulp; and the seeds are spherical, with the S-shaped raphe forming a bump on the surface. The juvenile of Monstera membranacea is similar to that of M. siltepecana, but many features of the adults separate the two species. Other than this, M. membranacea does not appear to be closely allied to any other species, although it clearly belongs in section Monstera.

General Description

Stem epiphytic, climbing, internodes terete, 1 – 2 cm long, 1 – 2 cm thick. Leaf blade of juvenile plants exserted, ovate, cordate at the base, acuminate at the apex, lacking perforations. Petiole of adult plants 40 – 50 cm long, a little longer than the blade, sheath broad, from 2/3 to 5/6 the length of the petiole, persistent; geniculum 3 – 4 cm long; blade membranaceous, ovate, cordate at the base, shortly mucronate at the apex, 40 – 50 cm long, 25 – 32 cm wide, entire or irregularly pinnatifid, perforations round, uniseriate and situated next to the midrib, primary lateral veins 6 – 9 on each side, subparallel, secondary lateral veins reticulated between one another. Peduncle 13 – 17 cm long, marked with the scars of the 3 – 8 cm decurrent spathe. Fruiting spadix 10 – 18 cm long, 2.5 – 3.5 cm thick. Berries green, upper parts deciduous, revealing the seeds in an orange pulp. Seeds globose, 6 mm long.

Madison 1977: 55. Translated from Latin by Simon Mayo, 9 August 2009.
[CATE]

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 Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0