Grey Area,
The Lynx rotor head is considered to be of a semi rigid design, I don't think this is because the only axis of movement is in the pitch axis. If you look at the close up of the picture in Dave Jackson's link you can see a damper between the blade attachment point and the end of the flex arm. The damper runs parallel to a round titanium bar which is aprox 2"-3" in diameter and this bar is designed to flex in both the vertical axis and horizontal axis.
Jiff