Notes For Reference:-

Species, Varieties, or Forms in the Genus Melanmpyrum:

Melampyrum laxum var. laxum / Shikokumamakona
Melampyrum laxum var. nikkoense / Miyamamamakona
Melampyrum roseum v. japonicum / Mamakona
Melampyrum roseum var. roseum / Tsushimamamakona
Melampyrum setaceum / Hosobamamakona
　

Melampyrum roseum var. japonicum / Mamakona ママコナ

Marsilea quadrifolia is an aquatic fern growing wild at sunny water's edges, propagating by spores. Slender rhizomes extend sideways, branch, and produce four-leaflet clover-like leaves on approximately 20cm long petioles. Bloom time: July-September.