Jepson eFlora
Key to families | Table of families and genera

Key to Perideridia

View taxon page for Perideridia

1. Roots fibrous or ± thickened, generally 5–20-clustered; styles 0.8–1 mm

2. Basal blade leaflets widely lanceolate to ovate, 10–40 mm wide; petals 5–7-veined; fruit ribs prominent ..... P. howellii

2' Basal blade leaflets linear to lanceolate, 2–8 mm wide; petals 1-veined; fruit ribs thread-like ..... P. kelloggii

1' Roots tuberous, 2–6-clustered or 1; styles generally 1–2.5 mm

3. Basal leaves 1–2-ternate or 1–2-pinnate, with 1–3 pairs of 1° leaflets

4. Rays in fruit unequal, spreading-ascending; oil tubes per rib-interval 1 ..... P. lemmonii

4' Rays in fruit ± equal and ascending, or unequal and spreading-ascending; oil tubes per rib-interval 3–4 ..... P. parishii

5. Rays generally 12–14, ± equal in fruit; bractlets ± = pedicels; fruit ovate to ± round, 2.5–3.5 mm ..... subsp. latifolia

5' Rays generally 6–11, unequal in fruit; bractlets generally < pedicels; fruit oblong to ± ovate, 3–5 mm ..... subsp. parishii

3' Basal leaves generally 1-pinnate with 3–5 pairs of 1° leaflets, or 2–3-pinnately or ternate-pinnately dissected or compound

6. Basal leaves generally 1-pinnate with 3–5 pairs of 1° leaflets — proximal 1° leaflets occasionally lobed or ternately dissected ..... P. gairdneri

7. Tuberous roots 2–3-clustered; petals 5- or 7-veined ..... subsp. borealis

7' Tuberous roots 1; petals 1-veined ..... subsp. gairdneri

6' Basal leaves 2–3-pinnately or ternate-pinnately dissected or compound

8. Terminal leaf segments unlike lateral in size, form

9. Fruit 4–6 mm; bractlets scarious throughout, 3–9 mm, acuminate ..... P. bolanderi subsp. bolanderi

9' Fruit 5–8 mm; bractlets scarious-margined, 1–4 mm, acute

10. Plant 5–15 dm; tuberous roots cylindric, 5–12 cm; leaf segments flattened, 5–10 mm wide; oil tubes per rib-interval 1 ..... P. californica

10' Plant 3.5–7.5 dm; tuberous roots oblong to ovoid, 1–6 cm; leaflets cylindric, < 1 mm wide; oil tubes per rib-interval 3–4 ..... P. pringlei (2)

8' All leaf segments or leaflets similar in size, form

11. Longest rays in fruit 5–9 cm

12. 2° umbels generally spheric, generally 40–50(60)-flowered; 1° umbels ± concave distally, rays unequal; oil tube 1 per rib-interval ..... P. bacigalupii

12' 2° umbels convex distally, generally 20–25-flowered; 1° umbels convex distally, rays ± equal to unequal; oil tubes 3–4 per rib-interval ..... P. pringlei (2)

11' Longest rays in fruit 1–4.5 cm

13. Bracts 0–2, inconspicuous

14. Umbels strongly concave distally; rays in fruit unequal; fruit linear-club-shaped, 5–7 mm ..... P. leptocarpa

14' Umbels convex or flat distally; rays in fruit ± equal; fruit oblong, 3–6 mm ..... P. oregana (2)

13' Bracts 6–12, conspicuous

15. Bractlets widely scarious-margined, generally acuminate; oil tubes 2–3 per rib-interval ..... P. bolanderi subsp. involucrata

15' Bractlets narrowly scarious-margined, acute; oil tube 1 per rib-interval ..... P. oregana (2)

Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.