Cryptocoryne mekongensis T.Idei, Bastm. & N.Jacobsen

First published in Aqua Pl. 35: 143 (2010)
This species is accepted
The native range of this species is E. Thailand to Laos. It is a helophyte and grows primarily in the wet tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/199684/9117158

Conservation
DD - data deficient
[IUCN]

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

Distribution

Thailand, Mekong River: Laos, southern region of Champasak Province: Cambodia, Kratie Province.

General Description

Deciduous herb to 1.3 m tall. Subterranean stem a subglobose, stoloniferous tuber, up to 4 cm across and 2 cm high, white, with stolons to 10 × 1 cm. Pseudostem ca 20 cm long, green, mottled grey and pink. Leaf solitary, exceptionally bifoliate; cataphylls to 20 cm long, purple; petiole to 1 m long, similar in colour to the pseudostem; leaf blade radiate; leaflets 7–11, ovate, 10–20 × 4–6 cm, margins entire, apex acute, ending in an acumen 1 cm long, base cuneate and sessile, leaflets plain green, with impressed veins above, underside paler. Inflorescence held below the foliage; peduncle 5–20 cm long, green and pink mottled; spathe tube cylindrical, 4–6 × 1–1.2 cm, green with thin white stripes, spathe mouth margins recurved; spathe limb lanceolate, 5–8 × 3–4 cm, green, flushed red-brown, ending in a long brown tail to 25 cm long; spadix appendix well exserted from the tube, 5–6 cm long × 3–4 mm wide, pale green, stout, cylindrical, ending in a rounded and rugose apex curving forward; sessile, pistillate inflorescences with green bristles above the fertile part; fertile zone staminate or pistillate, cylindrical, 1.5–2 cm long; staminate flowers loosely arranged; pistillate flowers densely arranged; ovaries bottle-shaped, green; stigma sessile, penicillate, white. Infructescence on an erect peduncle, globose, 3–5 cm; fruits red-orange when ripe, 8–10 × 5–7 mm, top rounded, up to 3 seeds per berry. Seeds globose, 3–4 mm diam.

Habitat

Cryptocoryne mekongensis grows on river banks that emerge during the dry season from February to April, in partial sun. It can be found sheltered between rocks and big stones or in sheltered places growing in sand and gravel and more or less mud covered. Cryptocoryne mekongensis has been found growing together with different varieties of C. crispatula.

[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
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • 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