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Vascular Plants of California
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Key to Potentilla

View taxon page for Potentilla

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

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

1. Flowers 1, arising from axils of slender stolons

2. Leaf  ..... P. anglica

2' Leaf  ..... P. anserina

3. Leaf 3–15 cm, generally densely hairy adaxially;  generally 2–7 cm; 1200–2600 m; SNH, SnBr, GB ..... subsp. anserina

3' Leaf 3–50(75) cm, ± glabrous adaxially; pedicel generally 5–30 cm; generally < 150 m; NCo, CCo, SCo ..... subsp. pacifica

1' Flowers in ; stolons 0

4. Styles < or ± 1 mm,  from rough-thickened base to tip; petals variable

5. Perennial herb leaves generally present in flower;  margins ± rolled under; rocky alpine barrens and meadows, > 2700 m

6. Leaf ± palmate; leaflets ± 5, toothed > 3/4 to midvein ..... P. pseudosericea

6' Leaf ± pinnate; leaflets generally 5–13, toothed ± 3/4 to midvein

7. Leaflets generally 2–3 per side;  generally ± =  bractletssepals, flat ..... P. jepsonii

7' Leaflets 3–6 per side; petiole generally < blade; hypanthium bractlets generally ± = sepals, margins ± rolled-up ..... P. pensylvanica

5' Annual or biennial (to short-lived  herb); basal leaves often withered or fallen in flower; leaflet margins flat; generally moist or disturbed areas, < 3100 m

8. Leaf pinnate, leaflets 9–17; petals > sepals, cream, ± obcordate – leaflets toothed > 1/2 to midvein; MP ..... P. newberryi (2)

8' Leaf ternate or ± palmate, leaflets 3–7; petals < sepals (except Potentilla recta), yellow (occasionally fading white), generally  to obovate

9. St-base hairs generally ± denseglandular or not, < 1 mm,  or not; petals <= 2.5 mm; hypanthium generally 2–4 mm wide; fruit smooth, < 1 mm, ± white or light brown

10. Stem hairs glandular and not; leaflets 3, ± obovate; petals oblanceolate-elliptic ..... P. biennis

10' Stem hairs glandless; leaflets 3–5, oblanceolate to elliptic; petals obovate-elliptic ..... P. rivalis

9' St-base hairs sparse, glandless, < 2 mm, spreading; petals >= 3 mm; hypanthium 3–10 mm wide; fruit veined, ± 1–1.5 mm, ± brown

11. Leaflets generally 3; petals 3–4 mm; anthers ± 0.3 mm; annual to short-lived perennial herb ..... P. norvegica

11' Leaflets generally 6–7; petals 6–9 mm; anthers ± 1 mm; short-lived perennial herb ..... P. recta (2)

4' Styles >= 1 mm, ± slender (except Potentilla recta); petals ± obcordate, > sepals

12. Leaflets 3; inflorescence generally < 7-flowered (see also Fragaria, Sibbaldia)

13. Leaflets secondarily lobed as well as toothed ± 1/2 to base, sparsely hairy; styles ± rough-thickened at base; KR ..... P. cristae

13' Leaflets only toothed, not secondarily lobed, ± nonglandular; styles slender throughout; KR, CaRH, SNH

14. Teeth of central leaflet generally 7–15, generally uneven, ± 1/4 to midvein; pedicel 10–20 mm; pistils > ± 20; stem ± glabrous or sparsely spreading-hairy; KR, CaRH, SNH ..... P. flabellifolia

14' Teeth of central leaflet ± 7, even, 1/4–1/2 to midvein; pedicel 10–40 mm; pistils < ± 20; stem sparsely ; SNH ..... P. grayi

12' Leaflets > 3; inflorescence generally > 7-flowered (except Potentilla hickmanii)

15. Leaf pinnate to subpalmate (see also Horkelia, Horkeliella, Ivesia)

16. Annual to short-lived perennial herb; petals cream; style 1–1.5 mm; fruit veined – receding shorelines; MP ..... P. newberryi (2)

16' Perennial herb; petals yellow; style generally > 1.5 mm; fruit generally smooth

17. Leaf densely white-tomentose abaxially, ± green and strigose adaxially; style ± 1.5–2 mm – alpine barrens; c SNH, n W&I ..... P. morefieldii

17' Leaf hairs ± similar adaxially and abaxially (but hairs often denser abaxially); style 2–3.5 mm

18. Basal  < 1/2 stem; pedicel ± straight in fruit; 1100–3700 m

19. Petiole generally < blade, cottony-hairy; leaflets 3–7 per side, ± overlapped, palmately toothed > 1/2 to midvein – generally cottony-hairy throughout ..... P. breweri

19' Petiole generally > blade, glabrous to shaggy-hairy; leaflets generally 2–4 per side, occasionally separated, pinnately toothed ± 1/2 to midvein, occasionally split to base

20. Leaflets generally gray-hairy, ± overlapped; petiole generally dense-shaggy- or cottony-hairy ..... P. bruceae (2)

20' Leaflets generally green, glabrous to ± straight-hairy, generally separated; petiole glabrous or strigose ..... P. drummondii

18' Basal leaf generally > 1/2 stem; pedicel generally ±  in fruit; < 2000 m

21. Leaflets  or 2–3-toothed or lobed > 1/2 to midvein, larger 5–10 mm – MP ..... P. basaltica

21' Leaflets 2–10-toothed ± 1/2 or more to midvein, larger 5–22 mm

22. Leaflets 5–13 per side, 3–10(15)-toothed 2/3 to nearly to midvein; pistils ± 10–30; inland

23. Stem 5–20 cm; leaf 2–15 cm, petiole generally < blade; CaRH, ne-most SNH, GB; 900–2000 m ..... P. millefolia

23' Stem 25–50 cm; leaf 15–32 cm, petiole generally ± = blade; s NCoRO/SnFrB; 30–40 m ..... P. uliginosa

22' Leaflets 3–8 per side, 2–6 toothed ± 1/2–2/3 (rarely more) to midvein; pistils (2)5–15; coastal

24. Lateral leaflets toothed 1/2–2/3 (rarely more) to midvein; stem 5–25 cm; c CCo ..... P. hickmanii

24' Lateral leaflets toothed ± 1/2 to midvein; stem 20–50(70) cm; c SCo ..... P. multijuga

15' Leaf (sub)palmate

25. Stem ±  or hanging, generally <= 25 cm;  generally ± recurved in fruit; leaflet teeth < 11 – > 1800 m, s CA-FP, n W&I

26. Leaflets white-tomentose abaxially, ± green and strigose adaxially; n W&I ..... P. concinna var. proxima

26' Leaflet surfaces ± equally strigose; s CA-FP

27. Plant hanging from granite crevices; pistils generally 5–20; fruit ± smooth; pedicels generally > 15 mm; SnJt ..... P. rimicola

27' Plant rosetted to tufted in sandy soil; pistils generally > 15; fruit ± veined; pedicels generally < 15 mm; s SNH, SnBr, SnJt ..... P. wheeleri

25' Stem ±  to , generally 10–100 cm; pedicels ± straight; leaflet teeth often > 10

28. Leaflets distally 3–7(9)-toothed, glabrous (except margins, veins), glaucous (at least when fresh) ..... P. glaucophylla var. glaucophylla

28' Leaflets evenly 7–35-toothed, generally ± hairy, green to white

29. Leaflets toothed > 3/4 to midvein; stem and petiole hairs generally 

30. Longest petiole generally 5–10 cm; central leaflet 2–6 cm, teeth often narrowest at base, entire; petals 5–8 mm; SNH, Teh, TR, SnJt, SNE ..... P. gracilis var. elmeri

30' Longest petiole generally 10–25 cm; central leaflet 5–9 cm, teeth generally widest at base, often secondarily few-toothed; petals 7–10 mm; MP ..... P. gracilis var. flabelliformis

29' Leaflets toothed ± 1/2 or less to midvein; stem and petiole hairs spreading to appressed

31. Stem (and petioles) shaggy- to cottony-hairy; leaves often subpalmate, leaflets often irregularly deeply lobed as well as toothed ..... P. bruceae (2)

31' Stem (and petioles) straight-hairy; leaves palmate, leaflets regularly toothed

32. Leaf surfaces strongly contrasting, ± white-tomentose abaxially, green, sparsely hairy adaxially; stem hairs generally spreading

33. Glands generally 0 or hidden; nw KR, n NCoRO, CaRH; 120–1100 m ..... P. gracilis var. gracilis

33' Glands generally abundant; n W&I, 3000–3100 m ..... P. pulcherrima

32' Leaf surfaces similarly hairy, generally not white  abaxially; stem hairs appressed to spreading

34. Basal leaves generally prominent in flower; stem hairs of 1 length; fruit ± smooth; styles generally 1.5–2 mm, < 50 ..... P. gracilis var. fastigiata

34' Basal leaves generally fallen or withered in flower; stem hairs short- and long-spreading; fruit strong-veined; styles ± 1 mm, generally > 50 ..... P. recta (2)

 

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, http://ucjeps.berkeley.edu/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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