Leptochiton is a genus of South American plants in the family Amaryllidaceae native to Ecuador and Peru.
Leptochiton has phytomelanous seeds, which is unique among the tribe Hymenocallideae.
The diploid chromosome count is 2n = 24 or 2n = 34.
It was published by Joseph Robert Sealy in 1937 with Leptochiton quitoensis as the type species. It is placed in the tribe Hymenocallideae.
There are 2 known species, native to Ecuador and Peru:
The generic name Leptochiton is derived from the Greek leptos meaning thin, delicate, small, or slender, and chiton meaning covering or tunic. It refers to the thin testa.
It is closely related to Ismene, to which it shared a common ancestor 26.14 million years ago. It is the sister group to Hymenocallis, from which it separated 24.46 million years ago.