Cotula turbinata, L., 1753

Jakoet, A., Mucina, L. & Magee, A. R., 2019, The pseudo-radiate buttons: A taxonomic revision of the Cotula turbinata group (Asteraceae; Anthemideae) and the description of two new species *, South African Journal of Botany 121, pp. 282-293 : 283-284

4. Key to the species of the Cotula turbinata group

1a. Heads radiate, disciform or discoid.………other groups in Cotula . 1b. Heads pseudo-radiate (outer disc florets with one of the lobes greatly enlarged): 2a. Plants perennial: 3a. Pseudo-rays yellow; leaflets subterete; leaves densely clustered below the peduncle; plants not rooting at stem nodes; coastal areas between Mossel Bay and East London ……….……………….……………….

3b. Pseudo-rays white; leaves ± flat; leaves regularly arranged along the stem; plants rooting at stem nodes; upper slopes and summits of Cape Fold Mountains ……………….……………….……..2. C. perennans . 2b. Plants annual:

4a. Pseudo-rays white or rarely cream; disc floret cypselae without a myxogenic band around the fertile portion on the ventral surface: 5a. Cypselae of filiform outer florets smaller than involucral bracts, flat to only slightly concave on ventral surface; pedicels gradually longer towards the outer series; widespread between Darling and Swellendam …………………………………………………………………3. C. turbinata . 5b. Cypselae of filiform outer florets larger than involucral bracts, deeply concave on ventral surface with wings curved outwards; outermost series of pedicels abruptly longer than inner series; limestone depressions on the Agulhas Plain …………………………………………………………………..4. C. calcicola . 4b. Pseudo-rays yellow or orange; disc floret cypselae with a prominent myxogenic band around the fertile portion on the ventral surface: 6a. Pseudo-rays yellow, enlarged lobe of outer disc florets ±2 times length of other three lobes, pseudo-rays in single series; disc face convex ……………………………………………………………...5. C. pruinosa . 6b. Pseudo-rays usually orange (rarely golden yellow), enlarged lobe of outer disc florets ±4 times length of other three lobes, pseudo-rays in 2 series; disc face concave to flat …………..……...……..6. C. duckittiae .