Cespitose is an adjective that means growing in clumps. 

Our word of the day comes from the Latin word caespes (KIE ay space) meaning ‘turf’ or ‘sod.’ Its recently emerging offspring is used to refer to grass or other kinds of plants that grow in clumps. Example:

That cespitose grass around the cactus isn’t very plentiful here in the desert. As it gets warmer and warmer, those small clumps of grass will become even less common.