CDsSister said:
I will look forward to seeing pictures in high summer, please 
Spring tends to be the high time for most alpine gardens. Where these plants occur in nature at high elevations, the bloom season may be summer, but the bloom is often much earlier in cultivation at lower elevations and with warmer conditions. For many rock gardens, the show is largely over by "high summer", unless special care has been taken to plant later-blooming alpines... which can certainly be done though - it just takes thoughtful plant selection.
Pictures 4 and 10 look like
Saxifraga Androsace spp.
(as is #9 also) - please correct me if that's wrong, Fixpix.
Edit: Rick has rightly pointed out that 4 and 10 are Saxifraga.
#9 is
Androsace.
Edit: And continuing...
5.
Helleborus spp.
6, 20
Sedum spp.
7.
Sempervivum spp.
8.
Saxifraga cotyledon
11.
Euphorbia myrsinites
12.
Galanthus nivalis
