Jepson eFlora
Key to families | Table of families and genera

Key to Prunus

View taxon page for Prunus

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

1. Inflorescence an elongate raceme, flowers 15–many

2. Leaves deciduous, finely serrate; inflorescence leafy at base; fruit 6–14 mm ..... P. virginiana var. demissa

2' Leaves evergreen, entire or spiny-serrate; inflorescence leafless at base; fruit 12–25 mm ..... P. ilicifolia

3. Leaf margin spiny-serrate, ± wavy, blade widely ovate to round; petiole 3–10 mm; s North Coast Ranges, Central Western California, Southwestern California (except Channel Islands) ..... subsp. ilicifolia

3' Leaf margin generally entire, flat, blade generally ovate; petiole 8–25 mm; Channel Islands ..... subsp. lyonii

1' Inflorescence a short, ± flat-topped raceme of (3)6–12 flowers, or umbel-like to subsessile cluster of 2–5 flowers, or flowers 1

4. Ovary, fruit generally glabrous

5. Inflorescence a raceme; sepal entire; fruit 7–14 mm; twigs with true terminal bud ..... P. emarginata

5' Inflorescence an umbel-like cluster or flowers 1; sepal gland-toothed to nearly entire; fruit 15–30 mm; twigs with false terminal bud

6. Leaf blade elliptic to (ob)ovate, base obtuse; flowers 1(2), appearing before leaves; tree, roadsides, streambanks, chaparral as waif ..... P. cerasifera

6' Leaf blade oblong-ovate to ± round, base rounded to subcordate; flowers 2–5, appearing with leaves; shrub, mixed-evergreen or conifer forest ..... P. subcordata

4' Ovary, fruit densely puberulent or velvety

7. Tree 3–10 m, not thorny; leaf blade 25–150 mm; fruit 25–80 mm; petals 10–25 mm

8. Petiole (8)10–25 mm; leaf blade 25–100 mm; petals pink to nearly white; fruit pulp leathery ..... P. dulcis

8' Petiole 5–10(15) mm; leaf blade (50)70–150 mm; petals dark pink; fruit pulp fleshy ..... P. persica

7' Shrub < 4 m, often thorny; leaf blade 5–30 mm; fruit 7–18 mm; petals 1.4–12 mm

9. Leaf blade < 2 × longer than wide, base wedge-shaped to rounded or subcordate

10. Leaf blade ovate to obovate, ± hairy, base wedge-shaped to obtuse; flowers generally unisexual; hypanthium, sepals densely puberulent abaxially ..... P. eremophila

10' Leaf blade ovate to round, glabrous, base obtuse to rounded or subcordate; flowers bisexual; hypanthium, sepals glabrous abaxially ..... P. fremontii

9' Leaf blade >= 2 × longer than wide, base long-tapered

11. Petals (5)8–11 mm, dark pink to nearly white; pedicel (1)4–12 mm; leaf blade 2–6 mm wide, finely serrate ..... P. andersonii

11' Petals 1.4–4 mm, white to ± yellow; pedicel 0–4 mm; leaf blade 1–2(4) mm wide, generally entire ..... P. fasciculata

12. Leaf puberulent; s Sierra Nevada Foothills, Tehachapi Mountain Area, s Inner South Coast Ranges, n Transverse Ranges, e Peninsular Ranges, Desert ..... var. fasciculata

12' Leaf glabrous to low-papillate; s Central Coast, s Outer South Coast Ranges ..... var. punctata


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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