Senecio sect. Crociseris (Reichenbach) Boissier, 1844
publication ID |
https://doi.org/ 10.11646/phytotaxa.211.1.1 |
persistent identifier |
https://treatment.plazi.org/id/C5718784-FFC8-A16A-E4D8-FCE081CF37B8 |
treatment provided by |
Felipe |
scientific name |
Senecio sect. Crociseris |
status |
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Key to species of Senecio sect. Crociseris
1. Cauline leaves not strongly decreasing in size up the stem; basal and lower cauline leaves usually withering at flowering time........................................................................................................................... .............................................................. 2
- Cauline leaves decreasing in size up the stem; basal and lower cauline leaves usually remaining at flowering time, at least the lower cauline leaves ......................................................................................................................................................... 5
2. Involucral bracts (10–)12–13(–14) ................................................................................................................... S. doriiformis View in CoL
- Involucral bracts (15–)20–22(–30) ........................................................................................................................................ 3
3. Cauline leaves sessile, glabrescent to lanate beneath, slightly discolorous; stem fistulous................................ S. paludosus View in CoL
- Cauline leaves attenuated into a petiole, usually glabrescent beneath, concolorous; stem solid........................................... 4
4. Supplementary bracts 6.3–13.8 mm long; capitula 1(–3) ........................................................................... S. transylvanicus View in CoL
- Supplementary bracts 2.5–7.5 mm long; capitula (1–)4–7(–21)....................................................................... S. pyrenaicus View in CoL
5. Stem subscapose; basal leaves succulent in a dense rosette.................................................................................. S. auricula View in CoL
- Stem leaved; basal leaves neither succulent nor in a dense rosette........................................................................................ 6
6. Basal leaves cordate, sometimes truncate; cauline leaves amplexicaul-auriculate................................................................ 7
- Basal leaves attenuate to rounded, rarely subcordate; cauline leaves attenuate to semiamplexicaul .................................... 9
7. Supplementary bracts 3–8; achenes 7.6–9.8 mm long............................................................................................... S. olgae View in CoL
- Supplementary bracts 10–16; achenes 3.3–5.6 mm long ....................................................................................................... 8
8. Basal leaves reniform, with scattered scabrid-arachnoid trichomes to slightly lanate beneath; achenes with scattered intercostal trichomes........................................................................................................................................... S. perralderianus View in CoL
- Basal leaves ovate, glabrous beneath; achenes with dense intercostal trichomes......................................... S. trapezuntinus View in CoL
9. Leaves with persistent ± lanate indumentum .......................................................................................................... S. cilicius View in CoL
- Leaves glabrescent or with a dense arachnoid-floccose indumentum, tending to be caducous .......................................... 10
10. Involucre whitish, densely arachnoid-floccose to lanate......................................................................................................11
- Involucre greenish, glabrescent to arachnoid-floccose ........................................................................................................ 15
11. Synflorescence bracts ovate-lanceolate.................................................................................................................. S. eubaeus View in CoL
- Synflorescence bracts linear-oblong .................................................................................................................................... 12
12. Supplementary bracts (6–)9–10(–16); achenes with intercostal trichomes that are denser towards the apex ...... S. tauricola View in CoL
- Supplementary bracts (7–)13–20(–44); achenes glabrous or nearly so, sometimes with scattered intercostal trichomes .. 13
13. Basal leaves ovate to elliptic, sometimes lanceolate (ratio basal leaf width / basal leaf length = 0.44–1.12), ± discolorous; leaf-base usually rounded to subcordate; apex of involucral bracts slightly violet coloured with a black spot at the summit. ................................................................................................................................................................................. S. eriopus View in CoL
- Basal leaves lanceolate to oblanceolate, rarely obovate (ratio basal leaf width / basal leaf length = 0.15–0.68), ± concolorous; leaf-base usually attenuate; apex of involucral bracts greenish or blackish ................................................................. 14
14. Supplementary bracts ± imbricated; involucral bracts smooth, usually without a black spot; ligulate florets pale yellow; capitula 1(–3)........................................................................................................................................................... S. scopolii View in CoL
- Supplementary bracts not imbricated; involucral bracts 0–2-keeled, usually with a black spot; ligulate florets yellow to orange; capitula 1–4(–9).................................................................................................................................... S. doronicum View in CoL
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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