“Fear can affect our perception of reality,” says an inquisitive shrink about halfway through “Little Joe,” Jessica Hausner’s highbrow horticulture horror flick (say that three times ...

In a purple-lit room in their home, they look at Little Joe with awe. But Alice doesn’t quite know how to deal with her son when the plant’s happiness-dispensing starts to change him.

Imagine Invasion of the Body Snatchers for the age of antidepressants — that’s Little Joe, the seventh feature (and first in English) from Austrian provocateur Jessica Hausner (Lourdes ...