This question How often must carnivorous grassland eat?

was really interesting for me to read. However it made me wonder, how would the bone grass scientifically kill? (is there a way to really make paralytic pollen?)

Here are the criteria:

• as long as it looks like white grass it counts(you could have snakes hidden in the ground or something)

• it must kill via paralyzing its prey

• the more efficient it is at "hunting" the better

• solution must be scientifically plausible

• no need to explain the reasons it would evolve, I don't believe in that. Makes creature design easier. :)

If anyone has any suggestions I'd love to hear them.