Hygrophila stricta is listed in the aquarium literature as a synonym of Hygrophila corymbosa, the giant hygrophila from South-East Asia.1 Nomenclaturally, however, the combination Hygrophila stricta (Vahl) Lindau is illegitimate and is assigned to Justicia stricta, whose placement is unresolved.2 The identically spelt name Hygrophila stricta Hassk. refers to a different plant and belongs to Hygrophila ringens.3
The marsh plant meant by this name bears stalked leaves arranged in decussate pairs on upright stems up to 5 mm thick.1 It thrives in slightly alkaline, medium-hard to hard water; particularly good growth has been observed in strong current.1 Given plenty of light and warmth it flowers readily in marsh culture, for instance in hydroculture containers on a windowsill.1
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