A genus of plants, some of which are huge herbs cultivated for their giant, palmately nerved leaves. The flowers are tiny, borne in big panicles. The petioles have hollows, inhabited by cyanobacteria. There are about 40 species, occurring mainly in S. America, but also scattered in the southern temperate zone and the tropics generally. G. manicata is giant or prickly rhubarb, often grown in damp patches in gardens large enough to give it room.
Subjects: Plant Sciences and Forestry.