Another vote for potentilla.
karen
portland, or

"Wendy B G" wrote in message
...
Can anyone recommend a shrub, preferable flowering at some point, that
won't
exceed 6' tall by 6' around that can take 100 degree summers on a
Southern
exposure that gets full sun all day? In in zone 5

Potentilla.
Floribunda roses. Keep them watered in the heat.

Wendy
Sequim, WA (Zone 8)