Question
Is there a perrenial plant called jasonine please?

Answer
Meloney,
I have not heard of it,but that doesn't mean it doesn't exist.If I live to be 100 I still would not know ALL the plants in the plant kingdom.It may be a latin name instead of the common name.I would have to study horticultural latin names for many years to get even half of them.Also,it could be known as a different name in another region.That happens a lot.For instance the Lycoris squamigera is also called "Magic Lily","Naked Ladies","Mystery Lily","Resurrection Lily". And it's not even in the lily family.So you get my point.Here are the best sites to find it,if indeed it does exist.

www.wildflower2.org
www.perennials.com
www.musserforests.com
www.bestratedsites.com/Products/1016
White Flower Farm
Wayside Gardens
Van Bourgondien(bulbs.few perennials)
Van Dycks(bulbs,few perennials)
Burpee seed Co.
Jung seed Co.
Sheperds Garden Seeds
Good Luck!