Leptochiton
Temporal range: Late Oligocene – Recent[1]
Leptochiton quitoensis[2]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Amaryllidoideae
Tribe: Hymenocallideae
Genus: Leptochiton
Sealy
Type species
Leptochiton quitoensis
Leptochiton is native to Ecuador and Peru[3]

Leptochiton is a genus of South American plants in the Amaryllis family.[4][5]

There are 2 known species, native to Ecuador and Peru:[6]

Description

Leptochiton quitoensis (Herb.) Sealy bulb with scale bar (3 cm)

Generative characteristics

Leptochiton has phytomelanous seeds, which is unique among the tribe Hymenocallideae.[7]

Cytology

The diploid chromosome count is 2n = 24 or 2n = 34.[7]

Phylogeny

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.[1]

Hymenocallideae

Hymenocallis

Leptochiton

Ismene

References

  1. 1 2 Meerow, A. W., Gardner, E. M., & Nakamura, K. (2020). "Phylogenomics of the Andean tetraploid clade of the American Amaryllidaceae (subfamily Amaryllidoideae): unlocking a polyploid generic radiation abetted by continental geodynamics." Frontiers in Plant Science, 11, 582422.
  2. ↑ illustration from Baker, John Gilbert. 1878. Curtis's Botanical Magazine 104: plate 6397, as Ismene tenuifolia
  3. ↑ "Leptochiton Sealy". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 30 July 2023.
  4. ↑ Sealy, Joseph Robert. 1937. Botanical Magazine 160: plate 9491
  5. ↑ Jørgensen, P. M., M. H. Nee & S. G. Beck. (eds.) 2014. Catálogo de las plantas vasculares de Bolivia, Monographs in systematic botany from the Missouri Botanical Garden 127(1–2): i–viii, 1–1744.
  6. ↑ Kew World Checklist of Selected Plant Families
  7. 1 2 Meerow, A. W., Guy, C. L., Li, Q. B., & Yang, S. L. (2000). "Phylogeny of the American Amaryllidaceae based on nrDNA ITS sequences." Systematic Botany, 708-726.
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