The photos in this post were originally published here as belonging to O. undulosa, but Derek Tribble of London kindly made me aware of them representing in fact O. gymnodiscus. For more information see Derek’s comment.
This is a tuberous, erect or sprawling plant to 35 cm tall, with leathery, oblanceolate to elliptic leaves which are tapering below and somewhat clasping.
The solitary yellow flowerheads are terminal or axillary and disciform ((without ray florets); they appear in July and August.
Its area of distribution is from Cedarberg to Worcester and Little Karoo to as far east as Port Elizabeth on sandy slopes and flats.
Hi Frans,
I’ve become very interested in the genus Othonna. Regrettably all the photos here are not O. undulosa but O. gymnodiscus, e.g.
https://www.inaturalist.org/observations?nelat=-33.424311117894725&nelng=22.261491893220107&place_id=any&swlat=-33.945386484059036&swlng=21.157365916657607&taxon_id=528601
https://www.inaturalist.org/observations?nelat=-33.30012155198876&nelng=22.93968944112271&place_id=any&swlat=-33.90405091592425&swlng=21.24779490987271&taxon_id=591135
For an in-depth discussion of the difficulties, see here: https://www.inaturalist.org/observations/126509864.
Best wishes, Derek, London