Araceae Juss.
Arum L.

Arum orientale M.Bieb.

This species is accepted, and its native range is E. Central Europe to W. Caucasus.


CATE Araceae, 17 Dec 2011.

Spathe-limb evenly suffused with pale purple on inner surface. Spadix-appendix slender-cylindric, up to ¾ as long as spathe-limb. Inflorescence smelling of horse-dung.
General Description
Tuberous herb sprouting in mid-autumn to late autumn from a discoid, horizontally orientated tuber 4-6 cm across, 2-2.5 cm thick. Petiole terete, 18-46 cm long, 3-7 mm wide, deep greeen, usually stained with purple, especially towards the base. Leaf- blade broadly hastate, apex obtuse to subacute, 8.5-25 cm long, 5.5-17 cm wide, deep green. INFLORESCENCE smelling moderately of horse-dung. Peduncle much shorter than to almost equalling the leaves, terete, 11-19 cm long, 3-4 mm wide, deep green, sometimes stained with purple. Spathe 14.5-30 cm long; spathe-tube oblong-cylindric, 2.5-5.5 cm long, 1.5-2.5 cm wide, constricted apically, exterior mid-green with dull purple staining towards the margin and apex, fading to greenish white at the base, interior greenish white below, purple above; spathe-limb ovate to ovate-lanceolate, 12-24.5 cm long, 4-7 cm wide, erect at first but the apex soon flopping forwards, acute to rather bluntly acute, externally pale to mid-green, heavily to moderately stained purple, median vein pale green, internally similarly coloured, but with much heavier purple staining, apex mid-green. Spadix ? - ½ as long as the spathe-limb, 5.5-16 cm in total length; appendix slender-clavate to cylindric, long-stipitate or stalkless, 3.5-13 cm long, 3.6-6.5 cm wide, dull mid-purple, stipe when present generally paler. Staminodes in c. 2 whorls forming a zone 4-7.5 mm long, yellow, flushed with purple; bases conic, smooth, yellow. Interstices upper 3.5-4 mm long, sparsely grooved, minutely verrucate, yellow; lower ± absent. Staminate flowersin an quadrate zone 2-5.5 mm long, 3-5 mm wide; anthers yellow with purple tips, connectives yellow. Pistillodes in 3 or 4 whorls forming a zone 3-7 mm long; bristles filiform, flexuous, 2.5-6 mm long, yellow, flushed with purple; bases compressed conic, smooth, deep yellow. Pistillate flowersin a globose-cylindric cluster, 4.5-20 mm long; ovaries globose, 1.5-2 mm long, dull olive-green, stained with purple apically; stigma papillose, green. Fruiting head cylindric, 4-5.6 cm long, 2-2.5 cm wide; berries oblong, 5-10 mm long, 3.5-5 mm wide. Germination unkown in subsp. orientale and subsp. longispathum.

Native to:

Austria, Bulgaria, Czechoslovakia, Greece, Hungary, Krym, Lebanon-Syria, North Caucasus, Palestine, Romania, South European Russi, Transcaucasus, Turkey, Turkey-in-Europe, Ukraine, Yugoslavia

Arum orientale M.Bieb. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Dec 1, 1986 Zorab, M. [14], Turkey K000499296 Unknown type material Yes
Sintenis, P. [2064], Turkey K000400326 isotype Yes
Buckley, S.B. [s.n.], Georgia (USA) K000499492 Unknown type material Yes

First published in Fl. Taur.-Caucas. 2: 207 (1808)

Accepted by

  • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.
  • Takhtajan, A.L. (ed.) (2006). Konspekt Flora Kavkaza 2: 1-466. Editio Universitatis Petropolitanae.


CATE Araceae

  • Boyce, P.C. 1993. The Genus Arum. 196 pp.

Kew Backbone Distributions

  • Tohmé, G. & Tohmé, H. (2014). Illustrated Flora of Lebanon, ed. 2: 1-610. CNRS Publication.

  • 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

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  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.

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