Thanks a lot for taking the trouble to share your much appreciated thoughts. It appears that there’s much conflict online as to whether Portulaca grandiflora is an annual or perennial with the majority voting it as an annual. So we’ll just leave it as an annual. Even the naming of images seen in many websites are contradictory. We will definitely be editing this article when I can find the time to do more research online and most probably decide to omit the cultivars’ name as it’s not easy to nail their correct ID by just comparing images.

Re Gypsophila muralis, yes someone had helped ID our image at Flickr. Thanks.

Here is the pic between the annual and perennial portulaca( Your picture been used by this webside)

http://www.thedezignengine.com/image0027/portulaca-grandiflora-sundial-peach-02.jpg

Left is annual portulaca have less petals
Right is the perennial portulaca have more petals

Perennial type portulaca will not normally procude seeds but the annual type will and it will self seeding as well, this type of annual portulaca are not that hardy to grow in our wet climate.

I am not sure have u found the below plant ID? Here the name for you.
http://myfolia.com/plantings/272444-annual-gypsophila-gypsophila-muralis

To assist you, briefly named below are those listed in the database that love the full sun and can be grown in containers (larger ones for shrubs/palms):
1) variegated foliage: Codiaeum, Pithecellobium,Sansevierias and Tradescanthia; non-variegated: Nolina and Podocarpus; palms: Rhapis and Veitchia;
2) flowering plants such as Adenium obesum, Allamanda, Alpinia, Bauhinia, Bougainvillea, Brunfelsia, Caesalpinia, Calliandra, Carphalea, Crossandra, Cuphea, Duranta, Euphorbia milii, Heliconias, Ixora, Lantana, Loropetalum, Melampodium, Nerium, Plumbago, Rhododendron, Ruellia, Wrightia, Zephyranthes, and of course Portulaca too. Cactus and Hibiscus are sun-lovers too, but not included in our database as yet.

Hope this helps! :)