Hieracium sect. Cernua, Uechtritz, 1875

Szeląg, Zbigniew, 2017, A new species and a new range extension in Hieracium sect. Cernua (Asteraceae) from Romania, Phytotaxa 309 (2), pp. 173-178 : 177-178

Key to the species of Hieracium sect. Cernua in Romania

1. Cauline leaves purple-spotted .......................................................................................................... H. telekianum Boros & Lengyel

1*. Cauline leaves unspotted....................................................................................................................................................................2

2. Florets tubular; involucres ± cylindrical..................................................................................................................... H. zanogae Pax

2* Florets ligulate or semi-tubular (joined at apex); involucres campanulate or subglobose.................................................................3

3. Florets semi-tubular................................................................................................................................................... H. coldei Szeląg

3* Florets ligulate....................................................................................................................................................................................4

4. Involucres glabrous ........................................................................................................................................... H. magocsyanum Jáv.

4*. Involucres with indumentum..............................................................................................................................................................5

5. Involucres campanulate with scattered simple hairs..........................................................................................................................6

5* Involucres subglobose with moderately dense to dense, simple hairs.............................................................................................11

6. Cauline leaves (5–)8–15; at least the upper ones semiamplexicaul and broadest at the base............................................................7

6*. Cauline leaves 3–7, sessile, attenuate at the base...............................................................................................................................9

7. Peduncles with sparse stellate hairs; involucral bracts 1.3–1.5 mm wide at the base........................................... H. nigrilacus Nyár.

7*. Peduncles with numerous to dense stellate hairs; involucral bracts 1.5–2.0 mm wide at the base....................................................8

8. Involucres 10–12 mm long; involucral bracts in two rows .............................................................................. H. borbasii R. Uechtr.

8*. Involucres 12–13 mm long; involucral bracts in three rows ........................................................................... H. kotschyanum Heuff.

9. Involucres campanulate; involucral bracts 1.5–2.0 mm wide at the base, obtuse at the apex; basal leaves oblanceolate................... ................................................................................................................................................................... H. porphyriticum A. Kern.

9*. Involucres narrowly campanulate; involucral bracts 1.0– 1.2 mm wide at the base, (sub)acute at apex; basal leaves lanceolate to narrowly elliptic................................................................................................................................................................................10

10. Basal leaves on both surfaces glabrous, lanceolate to elliptic, denticulate to remotely dentate; achenes black.................................. ........................................................................................................................................................................ H. ostii-bucurae Szeląg

10*. Basal leaves on the upper surface hairy narrowly elliptic to lanceolate, finely denticulate or ±entire; achenes brown ...................... .............................................................................................................................................................. H. lubricicaule (Nyár.) Borza

11. Involucres 9.0 mm long, with simple hairs 1–2 mm long; styles yellow................................................................. H. mirekii Szeląg

11*. Involucres 10–13 mm long, with (2–) 3–5 mm long simple hairs; styles dark.................................................................................12

12. Middle and upper cauline leaves entire............................................................................................................................................13

12*. All cauline leaves denticulate to dentate..........................................................................................................................................15

13 Involucres with pale, dark-based simple hairs 1.5–2.5 mm long ............................................................................ H. joannei Szeląg

13* Involucres with dark simple hairs (2–) 3–5 mm long........................................................................................................................14

14. Involucres with simple hairs (2–) 3 mm long; cauline leaves 1–2 cm long, rapidly reduced in size upwards; synflorescence branches 1–4 cm long, with 1–2 capitula; acladium up to 1 cm long .......................................................... H. tomiasae (Nyár. & Zahn) Nyár.

14*. Involucres with simple hairs 4–5 mm long; cauline leaves longer, gradually reduced in size upwards; synflorescence branches up to 10 cm long; acladium 1.5–3.0 cm long ................................................................................................... H. pawlowskianum Nyár.

15. Cauline leaves 2–3; synflorescence with 3–10 capitula ................................................... H. polyphyllobasis (Nyár. & Zahn) Szeląg

15*. Cauline leaves 4–6; synflorescence with 20–30 capitula ......................................................................................... H. mitkae Szeląg