Perennial thin-stemmed herb spreading by underground rhizomes. Basal leaves to 20 cm wide, divided into 7 main lobes, each further lobed and toothed, the leaf size diminishing up the stem. Flowers with petals 2-3 cm long, deep blue, generally pink fading to white at the base. [G. grandiflorum Edgeworth]
The largest-flowering of all geranium species.
Source: (2002). Geraniaceae. 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.
Lower-growing, with smaller leaves that have sharper and narrower lobes and flowers with a dark purple centre.