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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Annual, shrub, glabrous to densely glandular-hairy. Stem: generally branched from upper nodes. Leaf: petiole 5–45 mm; leaflets 3–5. Inflorescence: raceme, terminal, generally 1–4 cm, generally 5–40 cm in fruit; pedicels 4–20 mm. Flower: often ± unisexual (stamens or pistils vestigial), ± bilateral, parts generally yellow; sepals free or fused, deciduous above base; petal claw 0 to short. Fruit: longer than wide; septum linear to oblong; receptacle stalk-like, reflexed to ascending. Seed: 10–40.
6 species. (Greek: cutting all-around, from calyx) [Iltis & Cochrane 2007 Novon 17:447–451]

Key to Peritoma

1. Shrub; fruit inflated; petals 4–5 mm wide ..... P. arborea

2. Fruit fusiform ..... var. angustata

2' Fruit obovoid or spheric

3. Fruit obovoid ..... var. arborea

3' Fruit spheric ..... var. globosa

1' Annual; fruit not inflated; petals < 4 mm wide

4. Plant densely glandular-hairy; fruit oblong, ± flat; sepals awl-shaped, generally 4–6 mm ..... P. platycarpa

4' Plant glabrous or ± so; fruit ± linear, not ± flat; sepals ovate to lanceolate, generally 1.6–3 mm

5. Leaflets generally 3; petals purple (white) ..... P. serrulata

5' Leaflets generally 5; petals golden or pale yellow

6. Fruit 40–60 mm; receptacle in fruit 15–25 mm; petals golden yellow, 10–13 mm; stamens 20–30 mm; plant 5–10(20) dm ..... P. jonesii

6' Fruit 15–40 mm; receptacle in fruit 5–17 mm; petals pale yellow, 5–8 mm; stamens 10–15 mm; plant (1.5)2.5–3 dm ..... P. lutea


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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