herb. Leaves alternate, petioled, coarsely toothed, 3-nerved and penninerved.
Flowers monoecious, in small bracteate 3-fid, androgynous clusters which form
slender axillary and long terminal spikes. Male flower: perianth campanulate,
2-3 fid, valvate; stamens tricose. Female flowers: ovary included and more or
less adnate to the perianth; stigma linear, deciduous; ovule erect. Achene
broadly ovoid, acuminate included in the thickened fleshy or thin crustaceous
perianth; pericarp fragile.