Araceae
Rhaphidophora

Rhaphidophora megastigma Engl.

First published in Bot. Jahrb. Syst. 1: 180 (1880)
This species is accepted
The native range of this species is W. Sumatera. It is a climber and grows primarily in the wet tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

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

General Description
Robust homeophyllous liane to unknown ultimate height; seedling stage and pre-adult plants not observed; LEAVES: adult shoot comprised of greatly elongated, clinging, physiognomically monopodial, leaf, non-flowering stems and long, free, sympodial, leafy flowering shoots; stems smooth, subterete, internodes 1-6.5 x 0.7-1 cm, separated by weakly defined leaf scars; clasping roots c. 2 mm diam., minutely pubescent; feeding roots not observed; petiole narrowly but deeply channelled adaxially, 10-18 cm x c. 2 mm, basal and apical geniculi prominent; petiolar sheath rather prominent, extending 3.5-4 cm along petiole, soon falling to leave a prominent scar; lamina oblanceolate to narrowly oblong-elliptic, 15-30 x 5-6.5 cm, coriaceous and rather distinctly discolorous in dried material, apex acute to very briefly attenuate, base briefly decurrent; midrib prominently raised abaxially, slightly raised adaxially; primary lateral veins very faint, barely discernible; peduncle slightly compressed cylindrical, 2.5--3 x 0.25 cm; INFLORESCENCE: spathe ovate-boat-shaped, 4.5-6 x 2-2.5 cm, apex attenuate, falling at anthesis; spadix sessile, cylindrical, 4-4.5 x c. 1 cm; stylar region c. 1.25 x 2 mm, stigma ± ovoid, 1 mm diam, ± flush with the style, the middle excavated, the edges prominently raised; anthers barely exserted at anthesis; INFRUCTESCENCE unknown.
Distribution
Sumatera. Endemic.
Diagnostic
Leaf lamina notably coriaceous. Stigmas c. 1mm diam., the middle excavated, the edges prominently raised. Sumatera (endemic) Close to R. montana but differing by shorter (4.5-6 cm vs. 9-20 cm) cylindrical spadix and the large (1 mm diam.) deeply excavated stigma.
[CATE]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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