There are definately 6 leaves in the whorl of this Galium, our native species have whorls of less than six. I think this is the exotic Slender Bedstraw Galium divaricatum
About the location: north of the fence = special purpose reserve horse holding paddock; south of the fence = nature reserve. The area south of the fence has been recently removed from special purpose reserve and included into nature reserve The CNM boundaries may not reflect this change.