These plant creatures appear to be bundles of vines all round-up and wound together, forming a plant ball, which rolls along the plains or any (somewhat) flat surface. What few creatures realize is these are in fact semi-sentient plant creatures, and can be quite menacing if threatened.
Roller or Rolling Vine
N Small Plant
Init +3 Senses Low-light vision; Perception +6
DEFENSE
AC 16 touch 14, flat-footed 13 (+2 Dex, +4 natural)
hp 19 hp (3d8+6 con)
Fort +5, Ref +4, Will +1
Defensive Abilities Immune mind-affecting effects, poison, sleep, polymorph, stunning
OFFENSE
Speed 20 ft.
Base Attack +2, CMB +2 CMD 15
Melee Ball +4 (1d4+1) (bash, or bite)
Special Attacks Entrap
STATISTICS
Str 13, Dex 16, Con 14, Int 5, Wis 10, Cha 5
Base Atk +3 CMB +5 CMD 17 / +29 to avoid being tripped, bull rushed, etc
Feats Deep Roots, Skill Bonus +4 Perception
Skills +5 Perception , +12 Stealth; +4 Stealth bonus if planted outside
Languages Druid or Fae (Understand spoken, but they cannot read or speak)
ECOLOGY
Environment Any Forest or plains
Organization Pod (11 - 20)
Treasure Value Incidental
SPECIAL ABILITIES
Entrap - these rolling webbed balls try to bite anything that moves towards them, if their attack hits treat as being webbed. Small creatures that have grabbed a creature inflict a -2 attack or saving throw penalty if they bite onto the upper body. If they bite the lower region, they inflict a cumulative 20% reduction in speed. They continue to bite, inflicting damage until the creature collapses, then they release them.
Rollers look like an artificial device, similar to a vine or branch that has been twisted to have a rounded appearance. In fact, these are a semi-sentient plant that forms itself into a ball, so it can roll for both transportation and to roll away in a defensive action. Normally they are spread out against the ground, somewhat similar to a starfish sunning themselves, but when any creature or potential threat nears them, they ball up and roll themselves away. If they or their allies are threatened, rather than roll away, they head towards the danger, attempting to trap their opponent.
They can build up quite the speed from rolling down a hill, these plants have tiny tendrils all over their bodies, they use these to push themselves to gather speed or even climb up surfaces, albeit very slowly.
What many creatures are not aware of, that like many other plants is that Rollers never stop growing, so that these much smaller creatures are common, there are much larger, stronger, faster and keener.
HD Spd Size Base Atk Dmg Attr Skill Bonus Bonus Bonus
3 30 Small +4 1d6+2 +0 +6
6 30 Small +6 1d6+2 +3 +12
9 40 Medium +9 1d8+2 +6 +27
12 40 Medium +12 1d10+2 +9 +36
15+ 50 Large +15 2d8+4 +15 +60
For both attribute bonus and skill bonus, apply as desired but avoid putting more than half their bonus bump in any one attribute score.