Which brassicaceae?

[Broekhuis]

A couple years ago I got seed through the exchange for "Petrocallis pyrenaica". One seedling survived, bloomed a bit last year, and is blooming again on a slightly more robust plant now. It's clearly not petrocallis - probably some kind of alyssum, aurinia, or something in that botanical corner. Any ideas? My page about the plant is up here: http://www.robsplants.com/plants/PetroPyre2 and I'd love to get the identification correct.
Thanks in advance for any suggestions!

[Lori S.]

Compare to Alyssum spinosum.

[Broekhuis]

Indeed that's what was suggested by someone in a comment on my page. All the online photos of Alyssum spinosum show marvellously mounded, many-branched plants, to which I find it difficult to compare my small plant (which, at least at this stage of its growth, is not spiny). It's the best suggestion I have, just can't be sure yet.

[Krish]

I had this one last year flowering nicely.but died this spring.I do not know where i got it. can anyone identify this ?
Krish

[Lori S.]

A picture showing the leaves would be helpful, Krish, but lacking that, I'm pretty sure it's a Draba sp. anyway.

[Lori S.]

Rob, looking at your plant again, I'm starting to think it's something else again.   I can't enlarge your photo (as it was not posted as a thumbnail) but it looks like the inflorescence structure differs from Alyssum spinosum, shown below:

[Krish]

Hi Lori
the photo was taken last june. I have 3 different Drabas and all flower at this time of the year.The plant did not look like a Draba. The silvery leaves looked like the picture shown in this thread. I do have  one more picture which unfortunately does not show the leaves.
Krish

[Lori S.]

Perhaps try comparing to Physaria then, as a thought, Krish.