Ron Hardin wrote:
A couple mystery plants today on the bike ride

1. some rose http://home.att.net/~rhhardin5/w55.jpg
(which apparently is not multiflora rose because it doesn't
look like this http://home.att.net/~rhhardin5/w60.jpg )

by a field and river.

2. unknown flower with unusual leaf
http://home.att.net/~rhhardin5/w59.jpg flower
http://home.att.net/~rhhardin5/w59a.jpg leaf

I found some blue and some white, several miles apart.

Ron,
Your "rose"is in the genus Rubus, not Rosa. It's a blackberry or
dewberry. Not sure of the exact species.