Looks to me like bush morning glory Convolvulus if the flowers have yellow centers.

You're right the flowers do have yellow centers and look like morning glories, interesting! I bought the plant much smaller for its foliage, the flowers were a surprise!

More pics:

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This post was edited by tinan on Wed, Mar 20, 13 at 20:18

It you cut it back after flowering it will stay more dense and not get so scraggly

I kinda like it scaggly and "au natural" :) Maybe I'll give it a tiny trim.

If you like silver/gray folaige then take a look at this striking beauty. It does this every spring.
Actually it doesn't photograph well in bright light, but its definately a focal point right now.
I thin it every other year and comes back like crazy.
Bush Germander teucrium fruticana Azureum. I just bought 3 more for another area.
I like the silver gray also or textured plants, not just plain ol green.
I had a bush morning glory but took it out and can't remember for sure why,
but I think I wanted something taller.
But I have an area for one now...hmmm...
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Convolvulous Cneorum - likes a haircut in spring and a nice gritty soil.

gobluedjm, I have 2 of those as well - love them!

Here's my front walkway border garden today

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This is what it looked like last June when we bought the place

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This was last Sept, after I planted all the perennials

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They have filled in nicely!