Erik Leung wrote:

The last series of photos are of Hemianthus micranthemoides...umbrosum
has a rounder leaf shape, for example

http://www.sfbaaps.com/gallery/barr/barr_02_06.jpg

Cheers,

Erik Leung
e-aquaria.com

My goof. It's darn hard to ID the little guys from photos!

Looking forward to meeting you on Saturday at the Silicon Valley Aquarium Society meeting, Erik!