Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Hieracium

View taxon page for Hieracium

(For a list of species in Hieracium, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Ligule white or orange

2. Ligule white; stolons 0; native of forests ..... H. albiflorum

2' Ligule orange; stolons present; weed of disturbed sites ..... [H. aurantiacum]

1' Ligule yellow

3. Leaf glabrous on 1 or both faces

4. Leaf glabrous abaxially, sparsely to ± densely long-hairy adaxially; phyllaries glabrous or sparsely glandular; flowers 6–12 ..... H. bolanderi (2)

4' Leaf glabrous; phyllaries long-hairy, branched-hairy, and black-glandular; flowers 20–60 ..... H. triste (2)

3' Leaf ± hairy on faces (glabrous in Hieracium scouleri)

5. Phyllaries generally without long, glandless hairs (occasionally long-hairy in Hieracium argutum), often minutely branched-hairy and/or glandular

6. Flowers 30–60 ..... H. parryi

6' Flowers 4–30

7. Flowers 15–30;  7–9(12) mm; generally at least some leaves wavy-toothed (all entire); pappus ± white; c&s California ..... H. argutum (2)

7' Flowers generally 4–12(15); involucre (7)8–12 mm; leaves generally  (minutely dentate); pappus tan to ± brown; KR, NCoR, CaRH

8. Peduncle glabrous or stalked-glandular; fruit ±  ..... H. bolanderi (2)

8' Peduncle branched-hairy; fruit ± , not distally narrowed ..... H. greenei

5' Phyllaries with long, glandless hairs, occasionally also branched-hairy and/or glandular

9. Leaf faces minutely rough-hairy and/or stalked glandular ..... H. triste (2)

9' Leaf faces long-hairy, also sometimes branched-hairy (rarely glabrous in Hieracium scouleri)

10. Flowers 6–12(15); involucre ± cylindric to ± bell-shaped ..... H. horridum

10' Flowers 15–50; involucre obconic to bell-shaped

11. Some or all leaves wavy-toothed; c&s California ..... H. argutum (2)

11' Leaves all entire or some minutely ; n CA

12. Cauline leaves 0–3(5); pappus 4–6 mm ..... H. nudicaule

12' Cauline leaves generally (3)5–10+; pappus 6–7 mm ..... H. scouleri


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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