Salvinia has very interesting, complex hair-like structures on the top surfaces of the leaves. Their purpose isn't entirely understood, but they are thought to maintain a layer of air on the top surface of the leaf that may help the leaves remain dry and/or shed water if they get flooded. You can see these hairs in the first photo, of Salvinia molesta.
|Salvinia molesta (big) and Salvinia minima (right)|
The garden was full of these wonderful animal sculptures. This was near the end of the trip so the alligator/crocodile reminded us of home!