The genus Iochroma is not completely known.
Several of the species listed here are known to have resulted from hybridisation in the wild and there is extensive synonymy which is not recorded here.
Recent research indicates that some of the species listed here are not Iochroma (see notes) although changes in nomenclature have not formally been published.
There are also known to be undescribed species.

The genus is currently divided into three sections.

Section Iochroma
Iochroma albianthum S. Leiva
Iochroma australe Grisebach (see notes)
Iochroma ayabacense S. Leiva
Iochroma calycinum Bentham
Iochroma confertiflorum (Miers) Hunziker
Iochroma cornifolium Miers
Iochroma cyaneum (Lindley) M. L. Green
Iochroma edule S. Leiva
Iochroma fuchsioides Miers
Iochroma gesnerioides (Humboldt, Bonpland & Kunth) Miers
Iochroma grandiflorum Bentham
Iochroma loxense Miers
Iochroma nitidum S. Leiva & V. Quipuscoa
Iochroma peruvianum (Dunal) J. F. Macbride
Iochroma piuram S. Leiva
Iochroma sagasteguii sp.
nov ined.

Iochroma salpoanum S. Leiva & P. Lezama
Iochroma schjellerupii S. Leiva & Quipuscoa
Iochroma squamosum S. Leiva & V. Quipuscoa
Iochroma stenanthum S. Leiva, V. Quipuscoa & N. W. Sawyer
Iochroma tingoense sp.
nov ined.

Iochroma tupayachianum S. Leiva
Iochroma umbellatum (Ruiz & Pavon) D'Arcy
Section Lehmannia
Iochroma ellipticum (Hook.f.)
Hunziker
Iochroma lehmannii Bitter
Section Spinosa
Iochroma parvifolium (Roemer & Schultes) D’Arcy (see notes)
Unclassified
Iochroma warscewiczii Regel
The genus Iochroma is not completely known. Several of the species listed here are known to have resulted from hybridisation in the wild and there is extensive synonymy which is not recorded here. Recent research indicates that some of the species listed here are not Iochroma (see notes) although changes in nomenclature have not formally been published. There are also known to be undescribed species.
The genus is currently divided into three sections.
Section Iochroma
Iochroma albianthum S. Leiva
Iochroma australe Grisebach (see notes)
Iochroma ayabacense S. Leiva
Iochroma calycinum Bentham
Iochroma confertiflorum (Miers) Hunziker
Iochroma cornifolium Miers
Iochroma cyaneum (Lindley) M. L. Green
Iochroma edule S. Leiva
Iochroma fuchsioides Miers
Iochroma gesnerioides (Humboldt, Bonpland & Kunth) Miers
Iochroma grandiflorum Bentham
Iochroma loxense Miers
Iochroma nitidum S. Leiva & V. Quipuscoa
Iochroma peruvianum (Dunal) J. F. Macbride
Iochroma piuram S. Leiva
Iochroma sagasteguii sp. nov ined.
Iochroma salpoanum S. Leiva & P. Lezama
Iochroma schjellerupii S. Leiva & Quipuscoa
Iochroma squamosum S. Leiva & V. Quipuscoa
Iochroma stenanthum S. Leiva, V. Quipuscoa & N. W. Sawyer
Iochroma tingoense sp. nov ined.
Iochroma tupayachianum S. Leiva
Iochroma umbellatum (Ruiz & Pavon) D'Arcy
Section Lehmannia
Iochroma ellipticum (Hook.f.) Hunziker
Iochroma lehmannii Bitter
Section Spinosa
Iochroma parvifolium (Roemer & Schultes) D’Arcy (see notes)
Unclassified
Iochroma warscewiczii Regel
Iochroma