Senecio sect. Crociseris (Reichenbach) Boissier, 1844

Calvo, Joel, Álvarez, Inés & Aedo, Carlos, 2015, Systematics of Senecio section Crociseris (Compositae, Senecioneae), Phytotaxa 211 (1), pp. 448-450 : 448-450

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

 

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

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Genus

Senecio

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