I have #2 as Jatropha gossypifolia, #3 as a Clusia(not sure of species) and # 4 as a Neoregelia.
ETA: most likely Clusia guttifera 'Nana' ...Dwarf Pitch Apple
This message was edited Nov 16, 2012 2:55 PM
Hmmm... #1 may be a somewhat malnourished Salvia leucantha.
See also: http://davesgarden.com/community/forums/fp.php?pid=9334591&extraimg=0