Giant geranium?

Giant geranium?

Observation - Giant geranium?. Description: Occurs in same place every year, so assumed to be perennial. Height to 2.5 meters, flowering in July. Extremely thin, straggly appearance, with smaller leaves towards the top of the plant. Plants grow in clusters, but are not abundant. Flower diameter ab

Occurs in same place every year, so assumed to be perennial. Height to 2.5 meters, flowering in July.
Extremely thin, straggly appearance, with smaller leaves towards the top of the plant. Plants grow in clusters, but are not abundant. Flower diameter about 3 cm. Marly soil, ph = 8.0.