Hygrophila difformis 'Weiß-Grün'

Hygrophila difformis 'Weiß-Grün' is a cultivar of water wisteria, whose range extends from India to the Malay Peninsula.¹ White patterns, sometimes faint and sometimes strong, run mainly along the leaf veins and can also spread to the rest of the blade.¹ They are known to be caused by a virus; since the markings are not stable, it is recommended that the plant be treated as a cultivar rather than as a variety or form.¹

It has been in the trade since about 1976.¹ The variegation can persist under water as well and then has a decorative effect in a planting.¹ Its intensity appears to depend neither on light nor to any great extent on the growth rate, since a lack of chlorophyll can occur in fast- and slow-growing shoots alike.¹ With optimal care the cultivar can grow as vigorously as the species.¹