Jasmine oil (extracted from the flower) has no known toxicity,(no listings in any of the toxic substance databases I use,) but I'd be careful tasting randomly without finding out if it's really Jasmine (Jasminium sp.) or just something called Jasmine as a common name, like Cape Jasmine which is actually a gardenia and IS toxic. Gelsemium sempervirens (Called Jessamine, or yellow Jasmine or several other aka's) is also toxic. Just check to make sure your flower is actually a true Jasmine first. And even though it isn't listed as toxic, everyone's chemistry is different, so don't go ingesting a whole bunch on your first try.