Stems erect or stoloniferous, white-hairy on the square edges. Leaves to about 6 cm long, more or less ovate, the tip pointed and the margins toothed or shallowly cut. Flower clusters 6, leafy-bracted, each cluster of 2-10 flowers. Flowers with corolla to 2 cm long, yellow with brown spots; spring to summer.
Eurasia
f. argentatum (Smejkal) Mennema, Aluminium Plant. This is the most commonly cultivated variant, a trailing silver-variegated form that was given formal botanical status when it showed the potential to become invasive and weedy in Europe; it grows well in dry, shady conditions. Although given formal botanical status, this form is better known as the cultivar L. 'Florentinum'. It has also shown a tendency to become weedy in Australia. [Lamiastrum galeobdolon (L.) Ehrend & Polats., L. 'Florentinum']
Source: (2002). Lamiaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.