Araceae
Lasia

Lasia concinna Alderw.

First published in Bull. Jard. Bot. Buitenzorg, sér. 3, 1: 379 (1920)
This species is accepted
The native range of this species is Borneo (W. Kalimantan). It is a perennial or rhizomatous geophyte and grows primarily in the wet tropical biome.

Descriptions

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

General Description
Massive rhizomatous herb; rhizome condensed, orthotropic, decumbent, c. 13 cm diameter; stolons wanting. Leaves to c. 1.6 m long; sheath short, papery, brown, about a quarter of the length of the petiole; petioles diverging from near the base, mottled white, green, and olive, very spiny with the small spines mostly arranged in oblique, somewhat undulating combs; lamina hastate-sagittate, divided to the third or fourth degree, somewhat coriaceous, dark green, unarmed, c. 60 cm long; peduncle similar to but somewhat exceeding the petioles. Spathe erect, narrowly ovate, to c. 30 cm long, very thick and coriaceous, convolute below, constricted at the lower third above the level of the spadix apex, the upper part slightly twisted and gaping, in the lower part bright green with vertical yellow stripes, in the upper part pale brown outside, marcescent; spadix sessile, to c. 7.5 cm long, ± cylindrical, yellow. Flowers hexamerous; fruiting spadix c. 18 cm long, 6 cm diameter. Fruits ovoid, obtuse at the apex, smooth. Seed more or less pyramidal, c. 1.5 cm long, filling the locule, on apical placenta; seed-coat thin, brown, spinulous.
Distribution
Known only from a single plant cultivated at Bogor (II Q D5). No field-collected specimen has been located. The earliest reference to it in a catalogue of the plants at Bogor is in that of Boldingh (1916: 112). It is said to have originated in Borneo, with no more precise locality.
Diagnostic
Stem condensed, unarmed, not stoloniferous; leaves 3 x or 4 x divided.
[CATE]

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]

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 2025. 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 2025. 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