Ariopsis protanthera (Engl. & K.Krause) N.E.Br. ex Govaerts & Frodin

First published in World Checkl. & Bibliogr. Araceae: 181 (2002)
This species is accepted
The native range of this species is Nepal to N. Thailand. It is a tuberous geophyte and grows primarily in the seasonally dry tropical biome.


CATE Araceae, 17 Dec 2011.

Plants diminutive, not exceeding 12 cm; petioles very slender, 6–14 cm long, lamina 5–10 by 4–10 cm. Plants flowering before leaf emergence, fruits well developed when leaf expansion occurs. Transhimalaya, including North and Northeastern Thailand.
None recorded.
General Description
Very small, slender, seasonally dormant, lithophytic herbs with milky latex, to 12 cm tall. Stem a ± subglobose tuber, ca 2 cm diam., mostly clustered, covered with fibrous cataphyll remains. Leaves solitary. Petiole very slender, 6–14 cm, sheath very short; lamina peltate, cordate-ovate, 5–10 by 4–10 cm, membranaceous, pale green above, glaucous below, posterior lobes short, fully fused; primary lateral veins pinnate radiating from petiole insertion, forming submarginal collective vein; higher order venation reticulate. Inflorescence 1–3 in each floral sympodium, appearing before the leaves. Peduncle very slender, 4–5 cm, much longer than spathe, erect to spreading. Spathe ovate, boat-shaped, 2–2.5 by 1 cm, not constricted, fornicate, gaping widely at anthesis, not convolute at base, marcescent, dull yellow. Spadix shorter than spathe, ca 1.5 by 0.4 cm; female flower zone adnate to spathe, ca 4 mm long, few-flowered; ovaries rhombic-ovoid to rhombic-ovoid-oblong, ca 3 by 4 mm, pale green speckled purple, stylar region very short, stigma stellate with 4–6 lobes, lobes initially erect, later spreading and reflexed, whitish green; sterile interstice free, naked, ca 3 mm long; male flower zone fertile to apex, cylindric-conoid, ca 1 cm by 4 mm, many-flowered, dirty very pale yellow; synandria peltate, the connate filaments forming a stipe longer and narrower than dilated common connective, synandria all connate apically, forming continuous surface punctured by cavities with somewhat prominent margins into which pollen is shed from the 6(–8) surrounding thecae of which each pair of thecae belongs to a different synandrium. Fruit a 4–6-angled berry, ca 5 by 5 mm, pale green, stigma persistent.
Dry seasonal evergreen forest, on rocks by stream.
From NE India (Assam) through N Burma.

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.

Predicted extinction risk: not threatened. Confidence: confident


None recorded.


  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
  • 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.
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at and
    • © Copyright 2023 World Checklist of Vascular Plants.
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at and
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants.