This bush has many flowering white bulbs and petals, green stems lined with tiny thorns, and many small branches of greenish-brown.
A vampire rose stands motionless until its prey moves within range, when it strikes with a thorny stalk. Opponents are grabbed and drained of blood. When fully sated with blood, a vampire rose's petals flush red.
Since a vampire rose looks like a normal white rose bush when at rest, it takes a DC 20 Perception check to notice it before it attacks. Anyone with ranks in Survival or Knowledge (nature) can use one of those skills instead of Perception to notice the plant. Dwarves can use stonecunning to notice the subterranean version.