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?

Blue mist spirea, fernbush, rabbitbrush, Moonlight broom, apache plume,
waxflower, Russian globe peashrub, Nanking cherry, Russian sage to name a few.
sed5555