Slimebud is the transitory lifestage between a Slimemoss and Slimeblossom. It´s looks like a green plant with 2 leafs at the top. It suck nutrients from soil 2 blocks far from the Slimebud in any direction.
If it gets enough nutrients, it grows in to a Slimeblossom. If not, it dies without leaving any Slimemosses. Upon death it releases nutrients out to any soil within 2 blocks.
When a Slimemoss gets hungry, it dips its roots into the ground and starts sucking. Once it gets enough nutrients, it blooms into a beautiful flower. Like a snowflake, each one is unique and special and wonderful. Until the hero comes along and murders it, anyway.