The pearl weed growing in my tank looks nothing like the pearl weed I see in other peoples tanks. Mine forms a very dense bush without co2 injection and with moderate lighting. The internodes are shorter, the leaves are more curved and wider than in the example pictures. It only ever gets about 10cm tall and will grow no taller, the lighting levels make no difference to its height. In the two example pictures the leaves are much more narrow, are less curved and the plant is able to grow significantly taller than the pearl weed in my aquarium (30cm+). What's going on here? The plant was sold to me as Hemianthus micranthemoides but appears to differ in characteristics. Are these two different species? Could someone please clear this up it's driving me crazy!
Example 1 - MD fishtanks
Example 2 - Tropica
Example 1 - MD fishtanks
Example 2 - Tropica