2.7. Pontederia korsakowii (Regel & Maack) M.Pell. & C.N.Horn comb. nov.

Monochoria vaginalis var. korsakowii (Regel & Maack) Solms, Monogr. Phan. 4: 525. 1883.

Monochoria korsakowii Regel & Maack, Mém . Acad. Imp. Sci. Saint Pétersbourg, Sér . 7, 4(4): 155. 1861. Lectotype (designated here). RUSSIA. Ussuri, Keugxa Laa, fl., fr., 1859, R.K. Maack s.n. (LE barcode LE01007092!; isolectotypes: K barcode K000873544!; LE barcodes LE01007090!, LE01007091!, LE01007093!, P barcode P00730337!).

Distribution.

China, India, Indonesia, Japan, Korea, Malaysia, Pakistan, Russia, Sri Lanka and Vietnam.

Nomenclatural notes.

Cook (1989), in his revision for Monochoria, cites one of the specimens at LE as a holotype. Nonetheless, Regel and Maack (1861) make no direct mention of which herbaria the type specimens were deposited and which specimen was to be considered the type. Thus, we designate the specimen LE01007092 as the lectotype, since it possesses well-preserved flowers and seems to have been a model for the original illustration.