Allium scorodoprasum L. (E and C-Eur.) – A locally naturalized but possibly decreasing alien, known at least since 1925 (Profondeville). At present still known from ‘De Wateringen’ near Neerpelt (at least since 1956). Still present and apparently slightly more widely dispersed in Wallonia, especially in the valley of river Meuse (Ile-de-Dave, Dinant, formerly also at Profondeville, Annevoie, Yvoir). Probably gone in the valley of river Vesdre near Chaudfontaine but scattered locations elsewhere in Wallonia (Beloeil, Vaulx, Mariembourg,… often on former railway tracks; see also Duvigneaud & Saintenoy-Simon 1998).
The origin of the Belgian populations is diverse. The Walloon populations are probably garden escapes. In Neerpelt Allium scorodoprasum was introduced with Alpine grass seed, along with several other Central European species (Campanula rhomboidalis, Cirsium rivulare,…).
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Selected literature:
Duvigneaud J. & Saintenoy-Simon J. (1998) L’intérêt botanique des voies ferrées abandonnées. Adoxa 20-21: 67-71.
Lyth J.R.S. (1984) Sand leek (Allium scorodoprasum L.) in Lanarkshire. Glasgow Naturalist 20: 482-483.
Newton A. (1995) Sand Leek (Allium scorodoprasum) in v.c.58 (Cheshire). B.S.B.I. News 71: 77-78. [available online at: http://archive.bsbi.org.uk/BSBINews71.pdf]
Simkin S. (1996) Sand-leek - and slugs. B.S.B.I. News 72: 26. [available online at: http://archive.bsbi.org.uk/BSBINews72.pdf]
Verloove F. (2002) Ingeburgerde plantensoorten in Vlaanderen. Mededeling van het Instituut voor Natuurbehoud n° 20: 227 p.
Verloove F. (2006) Allium scorodoprasum. In: Van Landuyt W., Hoste I., Vanhecke L., Van den Bremt P., Vercruysse W. & De Beer D., Atlas van de flora van Vlaanderen en het Brussels gewest. Instituut voor Natuur- en Bosonderzoek, Nationale Plantentuin van België en Flo.Wer: 123.
Weeda E.J. (1976) Een merkwaardige groeiplaats van Allium scorodoprasum L. Gorteria 8: 69-73. [available online at: http://www.repository.naturalis.nl/record/526463]