Plant identification challenge...Krigia virginica (dwarf dandelion)

***Krigia virginica (dwarf dandelion) seems to be the consensus. Thanks for your help!
Do you know what plant this is?

We do not! We could use your help. If you know what this is or have any ideas, please let us know in the comments section below. (Some members of the Albemarle Co. Natural Heritage Committee are trying to compile a list of species for a rare habitat. This is one that has not been identified yet.)

When observed:
Where: Central Virginia, Albemarle County, Virginia
Habitat/ plant community type: granite outcrop
Elevation: 1025'
Aspect: south facing slope, full to part sun
Geologic substrate: granodiorite
Soils: sparse, very dry sandy loam, well drained
Associate plants: eastern prickly pear (Opuntia humifusa), fameflower (Talinum teretifolium), dwarf dandelion (Krigia virginica), Virginia pine (Pinus virginiana), pignut hickory (Carya glabra), post oak (Quercus stellata), eastern red cedar (Juniperus virginiana) and others.
Images © Devin Floyd, 2011.