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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Campanulids
Ordo: Asterales

Familia: Asteraceae
Subfamilia: Asteroideae
Tribus: Heliantheae
Subtribus: Helianthinae
Genus: Iostephane
Species: I. heterophylla – I. madrensis – I. papposa – I. trilobata

Iostephane Benth., Gen. Pl. (Bentham & Hooker f.) 2(1): 368. 1873.

Type species: I. heterophylla
(Cav.) Benth. ex Hemsl.

Pionocarpus S.F.Blake, Proc. Amer. Acad. Arts 51: 521. 1916.


Farr, E. R. & Zijlstra, G. eds. (1996-) Index Nominum Genericorum (Plantarum). 2009 Sept 21 [1].


International Plant Names Index. 2018. Iostephane. Published online. Accessed: Feb. 09 2018.
The Plant List 2013. Iostephane in The Plant List Version 1.1. Published on the internet. Accessed: 2018 Feb. 09.
Tropicos.org 2018. Iostephane. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Feb. 09.
Hassler, M. 2018. Iostephane. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Feb. 09. Reference page.

Iostephane is a genus of Mexican flowering plants in the sunflower family.[2][3][4]

The species are rosette-forming herbaceous perennials that produce relatively large heads with yellow or purple (I. heterophylla) rays. They have large, somewhat quadrate cypselae (achenes), that may either have or lack a pappus. Molecular phylogenetic studies [5] suggested that there is an unexpectedly close relationship between Iostephane and Dendroviguiera [6] (Viguiera sect. Maculatae), a genus of shrubs and trees that is also endemic to Mexico.


Iostephane heterophylla (Cav.) Benth. - widespread from Chihuahua to Oaxaca
Iostephane madrensis (S.Wats.) Strother - Chihuahua
Iostephane papposa J. J. Fay - Oaxaca
Iostephane trilobata Hemsl. - Chiapas, Oaxaca, Puebla, México State


Flann, C (ed) 2009+ Global Compositae Checklist
Bentham, George. 1873. Genera Plantarum 2: 368 in Latin
Strother, J. L. 1983. Pionocarpus becomes Iostephane (Compositae: Heliantheae): a synopsis. Madroño 30: 34-48.
Tropicos, Iostephane Benth.
Schilling, E. E. and J. L. Panero. 1991. Evidence for a close relationship between Iostephane and Viguiera sect. Maculatae (Asteraceae: Heliantheae). American Journal of Botany 78: 1054-1062.
Schilling, E, E. and J. L. Panero 2011. A revised classification of subtribe Helianthinae (Asteraceae: Heliantheae). II. Derived lineages. Botanical Journal of the Linnean Society 167: 311-331.

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