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Classification System: APG IV

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

Familia: Iridaceae
Subfamilia: Iridoideae
Tribus: Sisyrinchieae
Genus: Orthrosanthus
Species: O. acorifolius - O. chimboracensis - O. exsertus - O.laxus - O. monadelphus - O. muelleri - O.multiflorus - O. occissapungus - O. polystachyus

Orthrosanthus Sweet

Type species: O. multiflorus Sweet

Fl. Australasica t.11 (1827)
Cooke, D.A. (1986) Orthrosanthus. Fl. Austral. 46 :10-13.
Henrich, J.E. & Goldblatt, P. 1987. A review of the New World species of Orthrosanthus Sweet (Iridaceae). Annals of the Missouri Botanical Garden 74: 577–582. DOI: 10.2307/2399325 BHL JSTOR Reference page.

Orthrosanthus is a genus of flowering plants in the family Iridaceae first described as a genus in 1827. It native to Australia, Mexico, Central and South America.[1][2][3][4][5][6]

The genus name is derived from the Greek words orthros, meaning "morning", and anthos, meaning "flower".[7] They are known commonly as morning irises.[8]

These are rhizomatous perennial herbs. The linear to sword-shaped leaves are arranged in a layered fan. The flowers are usually blue, except in one white-flowered species. This genus is closely related to the genus Libertia. The flowers are very similar, but Libertia flowers are usually white.[7]


Orthrosanthus acorifolius (Kunth) Ravenna - Colombia, Venezuela
Orthrosanthus chimboracensis (Kunth) Baker - Chiapas, Costa Rica, Panama, Colombia, Venezuela, Ecuador, Peru, Bolivia, northwestern Brazil
Orthrosanthus exsertus (R.C.Foster) Ravenna - Mexico, Honduras
Orthrosanthus laxus (Endl.) Benth. - Western Australia
Orthrosanthus monadelphusRavenna - southern Mexico, Central America
Orthrosanthus muelleri Benth. Benth. - Western Australia
Orthrosanthus multiflorus Sweet - Western Australia, South Australia, Victoria
Orthrosanthus occissapungus (Ruiz ex Klatt) Diels - Peru, Bolivia, northwestern Argentina
Orthrosanthus polystachyus Benth. - many-spike orthrosanthus - Western Australia


Kew World Checklist of Selected Plant Families
Woodson, R.E. & Schery, R.W. (1945). Flora of Panama Part 3, Fasc. 1.. Annals of the Missouri Botanical Garden 32: 34-43.
Innes, C. (1985). The World of Iridaceae: 1-407. Holly Gare International Ltd., Ashington.
Cooke, D.A. (1986). Flora of Australia 46: i-xii, 1-247. Australian Government Publishing Service, Canberra.
Henrich, J.E. & Goldblatt, P. (1987). A Review of the New World species of Orthrosanthus Sweet.. Annals of the Missouri Botanical Garden 74: 577-582.
Espejo Serna, A. & López-Ferrari, A.R. (1996). Monocotiledóneas Mexicanas: una sinopsis florística 6: 43-59. Mexico City : Consejo Nacional de la Flora de Mexico.
Manning, John; Goldblatt, Peter (2008). The Iris Family: Natural History & Classification. Portland, Oregon: Timber Press. pp. 216–19. ISBN 0-88192-897-6.
"Orthrosanthus". FloraBase. Western Australian Government Department of Parks and Wildlife.

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