Asplenium scolopendrium 'Furcatum' et autres formes curieuses au Grand-Duché de Luxembourg

Asplenium scolopendrium ‘Furcatum’ and other peculiar forms in the Grand Duchy of Luxembourg. Asplenium scolopendrium L., the Hart’s-tongue, is present – although scattered – all over Luxembourg, but it can locally form extended populations. The fern is particularly appreciated in horticulture and numerous forms and varieties are known in trade; consequently, garden escapes are regularly observed. Some bifurcated forms recently discovered seem to be most likely of natural origin; other forms, especially the undulated varieties, seem however of anthropogenic origin. The present paper gives an overview of the forms and varieties known so far in the wild in Luxembourg.