8.5 x 7 in. (21.6 x 17.8 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

6 x 4.25 in. (15.2 x 10.8 cm.) ...

According to Dr Aura, the hippo grass, like the water hyacinth, is largely controlled by climate change but manual and scientific methods to control its growth and spread can also work.