Othonna gymnodiscus
See in-depth discussion on differences with O.undulosa:-
inat observation petrabroddle in Milnerton SW July 2022
https://www.inaturalist.org/observations/126509864
Othonna gymnodiscus
Tuberous, erect or sprawling, succulent perennial to 35 cm. Leaves oblanceolate to elliptic, leathery, tapering below and weakly clasping. Flower heads disciform, solitary, terminal or axillary, yellow; disc florets ± without pappus, pappus of marginal florets much elongated in fruit. July–Aug.
Sandy slopes and flats, NW, SW, KM, LB, SE (Cedarberg to Worcester, Little Karoo to Port Elizabeth).•
Othonna undulosa
undulosa (DC.) J.C.Manning & Goldblatt (= Othonna filicaulis auct., sensu Cape plants 2000) bobbejaankoolklimop Straggling, tuberous, succulent perennial to 70 cm, stems from a woolly crown. Leaves lanceolate to rotund, clasping and cordate at base, glaucous. Flower heads disciform, solitary, terminal or axillary, white or yellow, involucral bracts 10–12 mm long; pappus of marginal florets much elongated in fruit, 10–12 mm long. May–Aug. Sandy flats and slopes, often coastal, NW, SW, KM, LB, SE (S Namibia to Uniondale). gce
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