The second one is Lobelia cardinalis, possibly the 'dwarf' form-- it's hard to say.
I diagree, i still believe that it is infact alternanthera reineckii cardinalis, i do have some in my tank and it looks just the same, also the Lobelai looks WAY redder than this, if redder is a word
, also it looks just like the pictures OVT put up.
Wait! i was looking at the non aquatic plant, i see what you mean, but i still really think it is the Alternanthera.