Calendula tragus Aiton

Family: Compositae

Genus: Calendula


From Bot. Reg. ...the flower, which sometimes exceeds 3 inches in diameter, opens in the morning, when the sun shines, but closes in the afternoon and on the approach of rain: this it will continue to do for many days in succession. When fully expanded, a passing cloud will disturb it.


Published in Hortus Kew. 3: 271 in 1789. Basionym of Dimorphotheca tragus (Aiton) B.Nord.

PlantList shows C. tragus Jacq. as unresolved whereas Tropicos lists it as the basionym of Dimorphotheca tragus (Jacq.) DC. 1837 and a synonym of Osteospermum acutifolium Norl.

PlantList and IPNI show Dimorphotheca tragus DC. 1838 which is listed in PlantList as a synonym of Osteospermum acutifolium (Hutch.) Norl. 1954 and of Dimorphotheca acutifolia Hutch. 1917 which PlantList says is the accepted name.

C. tragus Curtis is listed in PlantList as illegitimate and a synonym of Dimorphotheca sinuata DC. 1838.

Also published in Bot. Reg. 1: 28 in 1815. From Bot. Reg. native of the Cape of Good Hope.

In Bot. Reg. there is discussion of 2 plants which are reluctantly placed in the same species. The first was published by Aiton Hortus Kew. 3: 271 in 1789. The second is listed as published by Jacq. in Pl. Rar. Hort. Schoenbr. 2: 14: 153 in 1797, by Curtis in Bot. Mag. 12: 408 in 1798 and by Persoon in Syn. Pl. (Persoon) 2: 492 in 1807. Later publications disagree as to whether the Curtis plant is different or the same as that of Jacq. or Aiton.

Other names listed in Bot. Reg.:

Calendula flaccida Vent. - synonym of Dimorphotheca tragus (Aiton) B.Nord.

Sources of Information

© 2010-12 Lisa J. Miner