i wonder if this is just plain ol' bowerae? why don't you let it perk up a bit and take another photograph? as for your other one, i'm not so hot at ID'ing rexes, but it looks familiar.
Hi Ming, Is'nt bowerae a mini begonia? Another thing, this species is from india ( a friend passed on a cutting to me)I hope this one perks up this summer. I have had it for a while now and each year it puts out 2-3 beautiful leaves, then starts to dry out on me! The leaves are larger than cleopatra for comparision. M