1. Family: Araceae Juss.
    1. Genus: Arum L.
      1. Arum pictum L.f.

        Arum pictum is unique in the genus Arum in its autumn-flowering, and in this respect, as well as in its horse-dung-like scent, resembles members of the related genus Biarum. The shiny, purplish and silver leaves are very beautiful, and persist through the winter.

    [KSP]

    Kew Species Profiles

    General Description
    Arum pictum is a low-growing, autumn-flowering arum with beautiful, shiny leaves and a purple spathe.

    Arum pictum is unique in the genus Arum in its autumn-flowering, and in this respect, as well as in its horse-dung-like scent, resembles members of the related genus Biarum. The shiny, purplish and silver leaves are very beautiful, and persist through the winter.

    Species Profile
    Geography and distribution

    Native to Majorca (Mallorca), Minorca, Corsica, Sardinia and the west coast of central Italy.

    Description

    Overview:  A winter-growing herb with a whitish tuber 5-7 cm across.

    Leaves: The arrow-head-shaped leaves are about 30 cm long and 15 cm wide. At first they are shiny and purplish, later becoming silvery or whitish.

    Flowers: The flowering stem (spadix) appears with or before the leaves, and smells strongly of horse dung. The spadix is 8-13 cm long, the appendage stout, cylindrical and purplish-black. The sheathing bract (spathe) is 9-19 cm long, 4-6.5 cm wide, greenish on the outside, deep, velvety purple-brown on the inside, with a mottled, greenish tip, and is slightly hooded. Three whorls of organs are found at the base of the spadix and enclosed in the folded spathe: the uppermost is a whorl of bristly staminodes (sterile stamens); in the middle there is a large cluster of small, male flowers; beneath there is a cluster of larger, female flowers.

    Fruits: The fruits, which are red when ripe, are berries 5-11 mm long.

    Threats and conservation

    The habitat of Arum pictum , like that of all Mediterranean coastal plants, is under pressure as a result of spreading urban development, particularly building for tourism.

    Uses

    Arum pictum is cultivated as an ornamental.

    Millennium Seed Bank: Seed storage

    The Millennium Seed Bank Partnership aims to save plant life world wide, focusing on plants under threat and those of most use in the future. Seeds are dried, packaged and stored at a sub-zero temperature in Kew's seed bank vault at Wakehurst.

    Number of seed collections stored in the Millennium Seed Bank: Three

    Cultivation

    Arum pictum is easily grown in a large pot. It should be kept dry in the summer, and watered in the winter (until May).

    This species at Kew

    Arum pictum is grown in the Rock Garden at Kew and may also be on display in the Davies Alpine House when it is flowering (October).

    Pressed and dried specimens of Arum pictum are held in Kew's Herbarium, where they are available to researchers from around the world, by appointment. The details of some of these can be seen online in the Herbarium Catalogue.

    Distribution
    Italy
    Ecology
    Mediterranean scrubland; often under Pinus halepensis.
    Conservation
    No specific threats are known, although the Mediterranean coastal habitat is being reduced as a result of urban development.
    Hazards

    None known, although related species of Arum are poisonous.

    [CATE]

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

    Phenology
    Flowering in October.
    Diagnostic
    Leaves ovate-cordate. Inflorescences produced at start of autumn growth period, with or before the leaves. Inflorescences almost sessile at ground level. Pistillodes absent, but staminodes present.
    General Description
    Tuberous herb sprouting in early to mid-autumn from a discoid vertical tuber 5-7 cm across, 2-2.5 cm thick. Petiole semi-terete, 15-25 cm long, 2-12 mm wide, pale to mid-green with slight purple staining basally, with a conspicuous,open, triangular basal sheath.Leaf- blade ovate-cordate, apex acute to obtuse, 9-25 cm long, 6-18 cm wide, shiny, deep metallic green tinged with purple, especially along the margins when first expanded, the veins paler, blade later becoming dull, deep green with a purple tinge and creamy white to silvery grey main and lateral veins, leaves very occasionally plain green. INFLORESCENCE appearing before or with the leaves, smelling strongly of horse-dung. Peduncle sessile at ground level, orrarely with up to 2 cm visible if growing in deep shade, terete, pale green. Spathe 11.5-21.5 cm long; spathe-tube oblong-cylindric, 2.5-5.5 cm long, 2.5-3 cm wide, constricted at theapex, exterior off-white below ground, pale green with scatteredpurple spots and staining above ground, interior dirty white withpurple staining along the margins; spathe-limb elliptic, 9-16 cmlong, 4-6.5(-8) cm wide, slightly cucullate, shortly acuminate, externally mid-green with heavy, deep purple staining, especially along the margins at the apex, internally velvety deep purple, the apex occasionally mottled mid-green. Spadix approximately 3/5 as long as spathe limb, 8-13 cm in total length; appendix stoutly clavate cylindric, long-stipitate, 6-11 cm long, 7-15 mm wide,deep purple-black with a satin sheen. Staminodes in 3 whorlsforming a zone 3-5 mm long; bristles subulate, stiff, 3-4.5 mm long, cream; bases slightly swollen, smooth, cream. Interstices: upper 2-3 mm long, longitudinally ridged, off-white; lower 1-2 mmlong, longitudinally deeply sulcate, cream. Staminate flowers inan oblong to globose zone, 5-7 mm long and wide; anthers palecream and connectives off-white. Pistillodes absent or very rarely a few vestigial bases present above the pistillateflowers. Pistillate flowers in a globose-cylindric cluster, 11-13mm long, 10-11 mm wide; ovaries oblong, tapering basally, 2.5-3mm long, pale cream; stigma yellow. Fruiting spike elongate-globose, 2.5-5 cm long, 2-4 cm wide; berries oblong-globose, 5-11mm long, 5-7 mm wide. Germination epigeal.
    Distribution
    Balearic Islands (Majorca, Minorca), Corsica, Sardinia, W Central Italy (Tuscany).

    Images

    Distribution

    Native to:

    Baleares, Corse, Italy, Sardegna

    Arum pictum L.f. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Mathew, B. [6973], Spain 29047.186
    Ferguson, L.F. [4126], Spain 51818.000
    s.coll. [s.n.] 76902.000
    s.coll. [s.n.] 66864.000
    s.coll. [s.n.] 66973.000

    First published in Suppl. Pl.: 410 (1782)

    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.

    Literature

    Kew Species Profiles
    • World Checklist of Selected Plant Families (2010). The Board of Trustees of the Royal Botanic Gardens, Kew. (Accessed 25 May 2011).
    • Boyce, P. (1993). The Genus Arum. Kew Magazine Monograph, Royal Botanic Gardens, Kew.
    • Boyce, P. (1988). Arum pictum. Curtis’s Bot. Mag. 5: 72-76.

    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
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Species Profiles
    Kew Species Profiles
    http://creativecommons.org/licenses/by-nc-sa/3.0