greene is correct. That info. was in that 1st link greene posted. It says:
Caesarweed has urease in its seeds, clearly giving them a kickstart at germination time. Urease-enhanced plant seeds are not rare, but even so, I dig the idea of a powerweed equipped with its own fertilizer-making enzyme. So often weeds have special means of establishment after their relocational skills plop them in strange new worlds.
