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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Ordo: Asparagales

Familia: Amaryllidaceae
Subfamilia: Amaryllidoideae
Tribus: Hymenocallideae
Genus: Ismene
Subgenera: I. subg. Elisena – I. subg. Ismene – I. subg. Pseudostenomesson
Species: I. amancaes – I. hawkesii – I. longipetala – I. morrisonii – – I. nutans – I. parviflora – I. pedunculata – I. ringens – I. sublimis – I. vargasiiI. narcissiflora
Nothospecies: I. × deflexa – I. × spofforthiae
I. amancaes - I. ×deflexa - I. hawkesii - I. longipetala - I. morrisonii - I. narcissiflora

Name

Ismene Salisb. ex Herb., Appendix: 45. 1821.

Type species: Ismene amancaes (Ker Gawl.) Herb.

Synonyms

Homotypic
Hymenocallis sect. Ismene (Salisb.) Traub, Pl. Life 36: 48. 1980.
Heterotypic
Liriope Herb., Appendix 41. 1821, nom. illeg. non Lour. (1790).
Liriopsis Rchb., Consp. Regn. Veg. 62 1828.
Type species: Liriopsis ringens (Ruiz & Pav.) Rchb. ex M.Roem.
Elisena Herb., Amaryllidaceae: 201. 1837.
Pseudostenomesson Velarde, Revista Ci. (Lima) 51: 47. 1949.
Siphotoma Raf., Fl. Tellur. 4: 22. 1838.

References

Salisbury, Richard Anthony, 1812. Trans. Hort. Soc. 1: 342.
International Plant Names Index. 2021. Ismene. Published online. Accessed: Aug. 2021.
Govaerts, R. et al. 2021. Ismene in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2021 Aug. 10. Reference page.
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Ismene (Amaryllidaceae). .
Meerow, A. W., C. L. Guy, Q.-B. Li & J. R. Clayton 2002. Phylogeny of the Tribe Hymenocallideae (Amaryllidaceae) Based on Morphology and Molecular Characters. Annals of the Missouri Botanical Garden 89(3):400-413.

Ismene, or Peruvian daffodil, is a genus of South American plants in the Amaryllis family.[3] The species are native to Peru and Ecuador and widely cultivated elsewhere as ornamentals because of their large, showy flowers.[4][5]

Ismene produces tender perennial bulbs bearing a strong resemblance to those of Hymenocallis, a genus into which Ismene had often been grouped in the past. However, its morphology differs from Hymenocallis in several significant ways: its vegetative parts, natural range, and chromosome number are all distinct.

Ismene can be difficult to grow in the United States.[6]

Species

A list of Ismene species and their geographic distribution is given below.[2]

Ismene amancaes (Ruiz & Pav.) Herb – western Peru
Ismene hawkesii (Vargas) Gereau & Meerow – Cusco, Peru
Ismene longipetala (Lindl.) Meerow – southwestern Ecuador, northwestern Peru
Ismene morrisonii (Vargas) Gereau & Meerow – Apurímac, Peru
Ismene narcissiflora (Jacq.) M.Roem. – south-central Peru
Ismene nutans (Ker Gawl.) Herb. – Peru
Ismene pedunculata Herb. – Peru
Ismene ringens (Ruiz & Pav.) Gereau & Meerow – Peru
Ismene sublimis (Herb.) Gereau & Meerow – La Libertad, Peru
Ismene vargasii (Velarde) Gereau & Meerow – Peru

Hybrids

Ismene × deflexa Herb. (I. longipetala × I. narcissiflora) – Peru

References

illustration from Flore des serres et des jardins de l’Europe by Charles Lemaire and others. Gand [Gent], Louis van Houtte, 1849, volume 5, plate 440
"Ismene". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew. Retrieved 2017-10-08.
Herbert, William 1821. An Appendix: [General index to the Botanical magazine, vol. 43-48 containing a treatise on bulbous roots] page 45
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.
Brako, L. & J. L. Zarucchi. (eds.) 1993. Catalogue of the Flowering Plants and Gymnosperms of Peru. Monographs in systematic botany from the Missouri Botanical Garden 45: i–xl, 1–1286.
Howard, Thad M. Bulbs for Warm Climates. Austin, Texas: University of Texas Press, 2001, pp 98–99.

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