Steve--I believe the other name for horse chestnuts is buckeye??
these plants are poisonous to bees and all other critters.
the "fruits" were used by native people to stun fish and
when they rise to the surface they are scooped up/./
i have the other kind, although i am fond of the shiny,
maroon pods of the buckeye tree. And for the reason that
my ansectors lived in a sod dug-out house on a homestead
near a small community named Buckeye in Nebraska.