Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.

S. L. Magoswana; J. S. Boatwright; A. R. Magee; J. C. Manning

doi:10.1016/j.sajb.2025.01.003

Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.

S. L. Magoswana
, J. S. Boatwright
, A. R. Magee
, J. C. Manning

Research output: Contribution to journal › Article › peer-review

Abstract

The largely southern African genus Othonna L. (Asteraceae: Senecioneae: Othonninae) is currently the subject of ongoing taxonomic investigations. Here we review the taxonomy of three small species-groups with radiate capitula. The O. cacalioides L.f. species-group comprises five species of dwarf succulents with tuber-like caudex and small capitula; the O. natalensis Sch.Bip. species-group includes two caespitose species from the summer-rainfall Drakensberg Escarpment; and the O. osteospermoides DC. species-group comprises three species of softly woody shrublets with large capitula. We provide descriptions, complete nomenclature and typification, illustrations and geographical distribution of the species. In addition we conclude that the name O. frutescens L. is not an illegitimate superfluous name for Cineraria othonnites L. as has been previously assumed by early authors. The only original material seems to be an illustration and we accordingly select this illustration as lectotype. This illustration matches Othonna coronopifolia L. and we accordingly reduce O. frutescens L. to synonymy under O. coronopifolia L.

Original language	English
Pages (from-to)	1-17
Number of pages	17
Journal	South African Journal of Botany
Volume	178
DOIs	https://doi.org/10.1016/j.sajb.2025.01.003
Publication status	Published - Mar 2025
Externally published	Yes

Keywords

Morphology
Nomenclature
Southern Africa
Synonyms
Taxonomy

ASJC Scopus subject areas

Plant Science

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Magoswana, S. L., Boatwright, J. S., Magee, A. R., & Manning, J. C. (2025). Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L. South African Journal of Botany, 178, 1-17. https://doi.org/10.1016/j.sajb.2025.01.003

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title = "Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.",

abstract = "The largely southern African genus Othonna L. (Asteraceae: Senecioneae: Othonninae) is currently the subject of ongoing taxonomic investigations. Here we review the taxonomy of three small species-groups with radiate capitula. The O. cacalioides L.f. species-group comprises five species of dwarf succulents with tuber-like caudex and small capitula; the O. natalensis Sch.Bip. species-group includes two caespitose species from the summer-rainfall Drakensberg Escarpment; and the O. osteospermoides DC. species-group comprises three species of softly woody shrublets with large capitula. We provide descriptions, complete nomenclature and typification, illustrations and geographical distribution of the species. In addition we conclude that the name O. frutescens L. is not an illegitimate superfluous name for Cineraria othonnites L. as has been previously assumed by early authors. The only original material seems to be an illustration and we accordingly select this illustration as lectotype. This illustration matches Othonna coronopifolia L. and we accordingly reduce O. frutescens L. to synonymy under O. coronopifolia L.",

keywords = "Morphology, Nomenclature, Southern Africa, Synonyms, Taxonomy",

author = "Magoswana, \{S. L.\} and Boatwright, \{J. S.\} and Magee, \{A. R.\} and Manning, \{J. C.\}",

note = "Publisher Copyright: {\textcopyright} 2025 SAAB",

year = "2025",

month = mar,

doi = "10.1016/j.sajb.2025.01.003",

language = "English",

volume = "178",

pages = "1--17",

journal = "South African Journal of Botany",

issn = "0254-6299",

publisher = "Elsevier B.V.",

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Magoswana, SL, Boatwright, JS, Magee, AR & Manning, JC 2025, 'Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.', South African Journal of Botany, vol. 178, pp. 1-17. https://doi.org/10.1016/j.sajb.2025.01.003

Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L. / Magoswana, S. L.; Boatwright, J. S.; Magee, A. R. et al.
In: South African Journal of Botany, Vol. 178, 03.2025, p. 1-17.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa

T2 - the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.

AU - Magoswana, S. L.

AU - Boatwright, J. S.

AU - Magee, A. R.

AU - Manning, J. C.

PY - 2025/3

Y1 - 2025/3

N2 - The largely southern African genus Othonna L. (Asteraceae: Senecioneae: Othonninae) is currently the subject of ongoing taxonomic investigations. Here we review the taxonomy of three small species-groups with radiate capitula. The O. cacalioides L.f. species-group comprises five species of dwarf succulents with tuber-like caudex and small capitula; the O. natalensis Sch.Bip. species-group includes two caespitose species from the summer-rainfall Drakensberg Escarpment; and the O. osteospermoides DC. species-group comprises three species of softly woody shrublets with large capitula. We provide descriptions, complete nomenclature and typification, illustrations and geographical distribution of the species. In addition we conclude that the name O. frutescens L. is not an illegitimate superfluous name for Cineraria othonnites L. as has been previously assumed by early authors. The only original material seems to be an illustration and we accordingly select this illustration as lectotype. This illustration matches Othonna coronopifolia L. and we accordingly reduce O. frutescens L. to synonymy under O. coronopifolia L.

AB - The largely southern African genus Othonna L. (Asteraceae: Senecioneae: Othonninae) is currently the subject of ongoing taxonomic investigations. Here we review the taxonomy of three small species-groups with radiate capitula. The O. cacalioides L.f. species-group comprises five species of dwarf succulents with tuber-like caudex and small capitula; the O. natalensis Sch.Bip. species-group includes two caespitose species from the summer-rainfall Drakensberg Escarpment; and the O. osteospermoides DC. species-group comprises three species of softly woody shrublets with large capitula. We provide descriptions, complete nomenclature and typification, illustrations and geographical distribution of the species. In addition we conclude that the name O. frutescens L. is not an illegitimate superfluous name for Cineraria othonnites L. as has been previously assumed by early authors. The only original material seems to be an illustration and we accordingly select this illustration as lectotype. This illustration matches Othonna coronopifolia L. and we accordingly reduce O. frutescens L. to synonymy under O. coronopifolia L.

KW - Morphology

KW - Nomenclature

KW - Southern Africa

KW - Synonyms

KW - Taxonomy

UR - https://www.scopus.com/pages/publications/85214580290

U2 - 10.1016/j.sajb.2025.01.003

DO - 10.1016/j.sajb.2025.01.003

M3 - Article

AN - SCOPUS:85214580290

SN - 0254-6299

VL - 178

SP - 1

EP - 17

JO - South African Journal of Botany

JF - South African Journal of Botany

ER -

Systematics of Othonna (Asteraceae: Senecioneae: Othonninae) in southern Africa: the O. cacalioides L.f., O. natalensis Sch.Bip., and O. osteospermoides DC. groups of species and the identity of O. frutescens L.

Abstract

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