without knowing spanish, it looks like the first sentence reads "flower or rotala, something something something emersed form" Next sentense looks like it's talking about cultivation. From the last I get that the flowers are delicate and approx 1cm.
(Google didn't fare much better
"Flower rotala, ela só opens nu emersa way. Ela cultivation within aquário do and also outside the water. Very delicate flower, tem approximately meio centimetre")
Looks very nice though, going to have to start growing some rotundifolia emersed to see if I can get it to flower.