Trifolium pallidum Waldst. et Kit. (S-Eur.) – A very rare and ephemeral alien. Recorded on a demolition site of a former horse artillery in Gent in 1995 (emerging from a long-buried seed bank). Originally doubtlessly introduced with oats and/or hay (see Verloove & Heyneman 2012). In 2013 also seen (a single plant) on an unloading quay for cereals at the Amerikadok in the Antwerp port area and in 2018 in a roadside in the Ghent port area, doubtlessly also from spilled grain.
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Selected literature:
Valdés B. & González Bernáldez F. (1972) Trifolium pallidum Waldst. et Kit., nuevo para la Peninsula Ibérica. Lagascalia 1: 89-97. [available online at: http://institucional.us.es/revistas/lagascalia/01/04%20valdes.pdf]
Verloove F. & Heyneman G. (2012) Merkwaardige plantencollecties van twee antropogene zaadbanken in Gent (Oost-Vlaanderen, België). Dumortiera 100: 19-24. [available online at: http://www.br.fgov.be/DUMORTIERA/DUM_100/Dum%20100_19-24_Zaadbanken%20Gent-Verloove%20en%20Heyneman.pdf]