Nolletia, Cassini, 1825

Herman, Paul P. J., 2013, Cypsela morphology in the genus Nolletia (Asteraceae, Astereae) and a revision of the genus, Phytotaxa 122 (1), pp. 1-44 : 8

Key to the species of Nolletia

1. Female florets shortly radiate, cypselae with oblong epicarpic cells .......................................................................... 2

- Female florets filiform, cypselae with oblong or circular epicarpic cells ................................................................... 4

2. Plants appressed pubescent but not glandular, capitula 14 mm in diameter..................................... 1. N. annemarieae

- Plants spreading pubescent and glandular-hairy, capitula 8–10 mm in diameter ........................................................ 3

3. Leaves narrowly obovate to narrowly elliptic, (3–)4–15(–22) × (0.8–)1.0–2.5(–3.0) mm ....................2. N. gariepina

- Leaves linear, (7–)10–30(–35) × 0.5–1.5 mm ....................................................................................... 3. N. tenuifolia

4. Cypsela surfaces dull, pale to dark or reddish brown, with oblong epicarpic cells...................................................... 5

- Cypsela surfaces shiny, orange or honey-coloured, with circular epicarpic cells ...................................................... 9

5. Involucral bracts without yellow, orange or almost black oil sacs .............................................................................. 6

- Involucral bracts with yellow, orange or almost black oil sacs ................................................................................... 7

6. Involucral bracts appressed pubescent, peduncle glabrous or sparsely appressed pubescent, always stipitate-glandular, leaves ciliate, lower surface appressed pubescent............................................................................5. N. jeanettae

- Involucral bracts glabrous, peduncle glabrous, rarely with a few stipitate-glands, leaves glabrous ..... 8. N. ruderalis

7. Capitula solitary, leaves densely set, imbricate and appressed to the stem ................................................ 4. N. ciliaris

- Capitula corymbosely arranged, leaves spreading, if appressed to the stem, not imbricate......................................... 8

8. Plants with simple, upright stems, sparsely branched in upper part into few-headed corymbose synflorescences, leaves few, appressed to stem and inconspicuous (bigger in Mpumalanga and some KZN specimens) ....................... .................................................................................................................................................................. 7. N. rarifolia

- Plants branched below middle into simple stems, branching upwards into multi-headed corymbose synflorescences, leaves distinct, spreading ..................................................................................................................... 6. N. welmaniae

9. Plants sparsely leafy, leaves filiform, cypselae with scattered, paired, circular epicarpic cells, each pair with a twin hair between them................................................................................................................................12. N. annetjieae

- Plants mostly densely leafy, leaves linear, narrowly obovate, narrowly elliptic to narrowly oblong, cypsela surfaces covered with circular epicarpic cells, each cell with a twin hair ............................................................................... 10

10. Leaves, stems and peduncles spreading pubescent ........................................................................ 9. N. vanhoepeniae

- Leaves, stems and peduncle glabrous to appressed pubescent ................................................................................... 11

11. Plants up to 1.3 m high, leaves 10–45 × 2–5 mm broad, growing along rivers ................................ 10. N. zambesica

- Plants up to 0.6 m, rarely up to 1 m high, leaves (10–)15–20(–30) × up to 2 mm broad, growing in desert or semidesert conditions........................................................................................................................11. N. chrysocomoides