Araceae
Arum

Arum hainesii Riedl

First published in Kew Bull. 36: 643 (1981)
This species is accepted
The native range of this species is E. Iraq. It is a tuberous geophyte and grows primarily in the subtropical biome.

Descriptions

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

Diagnostic
Inflorescence borne beneath the leaves. Spathe pale green on both surfaces. Spadix less than ½ as long as the spathe-limb, with numerous densely arranged staminodes; appendix stout, stipitate, pale brown.
General Description
Tuberous herb sprouting (in autumn ?) from a discoid, vertically orientated tuber 3-6 cm across, 2-2.5 cm thick. Petiole terete, 45-60 cm long, 4-5 mm wide, mid-green, paler basally. Leaf- blade hastate, apex acute to slightly obtuse, 10-33 cm long, 8.5-24 cm wide, dull mid-green. INFLORESCENCE scent unknown. Peduncle much shorter than the leaves, terete, 8-10 cm long, 3-4 mm wide, mid-green. Spathe 15.5-25 cm long: spathe-tube cylindric, 3.5-4 cm long, 2-2.5 cm wide, constricted apically, exterior pale green, interior paler, usually suffused with purple; spathe-limb lanceolate, 12-21 cm long, 2.5-4.5 cm wide, erect, acuminate, externally and internally pale green. Spadix less than ½ as long as the spathe limb, up to 13 cm in total length; appendix cylindric, stipitate, 4.5-5.5 cm long, 4-4.5 mm wide, pale brown, slightly farinose (artifact of drying ?). Staminodes in 5 whorls forming a zone 4-5 mm long; bristles filiform, flexuous, 7-8 mm long, pale cream; bases bulbiform, smooth, dull cream. Interstices : upper 2.5 mm long, ± smooth, cream; lower 2 mm long, longitudinally ridged, cream. Staminate flowers in an oblong zone 2 mm long, 5 mm wide; anthers and connectives dark purple. Pistillodes in 3 or 4 whorls forming a zone 2.5-3 mm long; bristles filiform, flexuous, 4-5 mm long, pale cream; bases compressed-semiglobose, smooth, cream. Pistillate flowers in a cylindric cluster 8-10 mm long, 3-4 mm wide; ovaries oblong, truncate, 2-2.25 mm long, pale yellow, purple apically; stigma cream. Fruiting spike oblong-cylindric, 4 cm long long, 1.5 cm wide; berries ovoid, 4.5-9 mm long. 3-3.5 mm wide. Germination not known.
Distribution
Eastern Iraq.
Phenology
Flowering in May.
Habitat
To date known only from cultivated ground.
[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

  • Herbarium Catalogue Specimens

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