Jepson eFlora
Key to families | Table of families and genera

Key to Claytonia

View taxon page for Claytonia

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

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

1. Perennial herb

2. Plant from thick, taprooted caudex or spheric tuberous root

3. Basal leaves many, from caudex; cauline leaves linear to narrowly oblanceolate; alpine; n&c High Sierra Nevada, Warner Mountains ..... C. megarhiza

3' Basal leaves 0 to few, from oblong to spheric tuberous root; cauline leaves ± linear to ovate or widely elliptic; montane to alpine; widespread, not include High Sierra Nevada, including Warner Mountains

4. Cauline leaves generally ± sessile, ± linear to ovate ..... C. lanceolata

4' Cauline leaves petioled, widely elliptic ..... C. umbellata

2' Plant from rhizomes, caudex generally 0 or short, taproot 0 or slender

5. Rhizome short, not branched, without bulb-like winter buds; petals ± = to >> sepals ..... C. sibirica (2)

5' Rhizome long, generally branched, often with bulb-like winter buds; petals >> sepals

6. Plant < 15 cm; rhizomes fleshy, pale, bulb-like buds 0; bract 1, below lowest flower; petals ± pink ..... C. nevadensis

6' Plant 15–60 cm; rhizomes slender, often ± brown, bulb-like buds at nodes; bracts 0 or 1 below each flower; petals generally white

7. Bracts 0; basal leaf blade widely ovate, base truncate to cordate, petiole distinct, linear; cauline leaves widely ovate, sessile ..... C. cordifolia

7' Bracts 1 below each flower; basal leaf blade narrowly elliptic to oblanceolate, base tapered, petiole ± indistinct, linear; cauline leaves oblanceolate to widely elliptic, sessile or tapered to winged petiole ..... C. palustris

1' Annual (rarely perennial herb in Claytonia rubra subsp. rubra)

8. Bracts 1 per 1–4 flowers; petals 4–12 mm; leaf blades oblanceolate to ovate, if ± linear, some leaf bases bulb-like

9. Flowers generally 1–2 per bract; cauline leaves lanceolate to ovate, free; petals 6–12 mm; stigmas maturing after anthers (cross-pollinated); Northwestern California, High Cascade Range, San Francisco Bay Area ..... C. sibirica (2)

9' Flowers often 2–4 per bract; cauline leaves widely ovate to ± round, free or fused < 5 mm on 1 side; petals 4–5 mm; stigmas maturing ± with anthers (self-pollinated); North Coast ..... C. washingtoniana

8' Bract generally 1, below lowest flower; petals 1–8 mm; leaf blades linear elliptic, oblanceolate, diamond-shaped, deltate, or reniform, leaf bases not bulb-like

10. Seeds dull black, ± tubercled, appendage ± brown, fleshy or shrunken, filling notch or not

11. Basal leaves ± prostrate; plant cushion-shaped, < 6 cm wide, generally not glaucous; cauline leaves ovate, free; petals 5–8 mm, ± pink; seed appendage filling notch ..... C. saxosa

11' Basal leaves decumbent to erect; plant open or tufted, often > 6 cm wide, generally glaucous; cauline leaves linear if free; petals 1–8 mm, pink or white; seed appendage not filling notch

12. Petals 5–8 mm; stigmas maturing after anthers (cross-pollinated); inflorescence 3–30-flowered, long-stalked above cauline leaves ..... C. gypsophiloides

12' Petals 2–5 mm; stigmas maturing ± with anthers (self-pollinated); inflorescence 3–15-flowered, sessile to long-stalked above cauline leaves ..... C. exigua

13. Cauline leaves free or ± fused on 1 side; petals 2–5 mm ..... subsp. exigua

13' Cauline leaves fused into ± disk; petals ± 2 mm ..... subsp. glauca

10' Seeds shiny black, smooth, appendage white, fleshy, filling notch or ± exserted from it

14. Basal leaf blades > 3 × longer than wide, base tapered gradually to petiole; petals 1–6 mm ..... C. parviflora

15. Petals 4–6 mm; stigmas maturing after anthers (cross-pollinated); cauline leaves fused into ± disk (or ± fused on 1 side) – Sierra Nevada Foothills, Tehachapi Mountain Area ..... subsp. grandiflora

15' Petals < 4(6) mm; stigmas maturing ± with anthers (self-pollinated); cauline leaves fused into ± disk or free (or ± fused on 1 side)

16. Cauline leaves free (or ± fused on 1 side) ..... subsp. viridis

16' Cauline leaves fused into ± disk

17. Basal leaves linear; vernally moist, often disturbed sites ..... subsp. parviflora

17' Basal leaves elliptic; rock crevices, alluvial fans, boulder fields ..... subsp. utahensis

14' Basal leaf blades < 3 × longer than wide, base cordate to tapered abruptly to petiole; petals generally < 5 mm

18. Basal leaves generally many, prostrate to spreading, smaller inward; cauline fused or ± free on 1 side; petals 2–3.5 mm ..... C. rubra

19. Basal leaves elliptic to obovate, base wedge-shaped; petioles but not whole plant often red ..... subsp. depressa

19' Basal leaves diamond-shaped to deltate, base ± truncate; petioles or whole plant often red ..... subsp. rubra

18' Basal leaves few to many, spreading to erect, ± equal; cauline leaves fused; petals 2–6 mm ..... C. perfoliata

20. Basal leaf tips mucronate; cauline leaf disk angles generally short-pointed ..... subsp. mexicana

20' Basal leaf tips obtuse to acute; cauline leaf disk angles generally 0 or ± obtuse

21. Basal leaves elliptic to round-deltate (diamond-shaped); shrubland, woodland, rock crevices, alluvial fans, boulder fields ..... subsp. intermontana

21' Basal leaf blades elliptic to deltate; vernally moist, often shady or disturbed sites ..... subsp. perfoliata


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