Perhaps
Str 13, Dex 9, Con 15, Int 1 or --, Wis 8, Cha 1
Perhaps tremeorsense or blindsense?
Using the Tendriculous (huge plant) from 3.5 MM as a basis we could use the following below. Since large-sized creatures can be up to 16ft, and medium size goes up to just near 8ft, I came up with the...