[Bert H]

Aubertii is much larger than japonica. Japonica will grow to 2-3 inches, while aubertii 10-14. Both are great plants.

 

[Bert H]

In my tanks and in perfect conditions B. aubertii reaches an height of around 1 meter (3.3 feet) with a leaf width of at least one inch.

I've never seen it like this either.