There still remains a question about the true status of creeping marshwort as a separate species, given its resemblance to fool's watercress and the fact that hybrids of the two plants have been found. However, there is definitely strong support for the fact that the species is a true variety and in 1995, English Nature added the plant to its Species Recovery Programme. It is also listed under the UK Biodiversity Action Plans (UKBAPs).
The location in Oxfordshire, where the plant has been monitored, has been declared a candidate Special Area of Conservation site (cSAC), which grants protection under European Law. Re-introductions have been carried out on other suitable sites with mixed success.
Visits to Belgium and the Netherlands where the plant also grows, have established that grazing might not necessarily be a management requirement. At one site, mowing of the sward by volunteers produced a return of creeping marshwort, albeit for just a short period. At another site regular, short mowing has created and maintained a long-term viable population.
Other studies have been made in the field to observe how the species is pollinated and which insects are necessary to carry out this task. This pollination experiment suggested that cross-pollination results in better seed production than if the plant pollinates itself. Experiments are also planned to re-introduce plants to other suitable sites and carefully monitor their progress in order to secure the future of this elusive species.
The UK Biodiversity Action Plan
for this species is available at UK BAP