Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Cylindropuntia

View taxon page for Cylindropuntia

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

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

1. Fruit generally spineless or occasionally with few thin, deciduous spines, generally fleshy to leathery in age, occasionally slow-drying

2. Fruit generally bearing flowers; perianth purple-red ..... C. prolifera

2' Fruit not bearing flowers; perianth white to yellow, green, or red-brown

3. Terminal stem segment > 3 × longer than wide

4. Stem  to , spines appearing sparse, spines of stem areoles generally ± equal, tubercles generally < 20 mm, oval; coastal, < 250 m ..... C. californica var. californica (2)

4' Stem erect, spines rather dense or if appearing sparse then tubercles generally > 20 mm,  to elongate, spines of stem areoles generally with 1–3 longer central; inland, generally > 700 m ..... C. bernardina (2)

3' Terminal stem segment generally < 3 × longer than wide

5. Tubercle length ± = width ..... C. bigelovii

5' Tubercle length ± 2 × width

6. Spines 7–10 per tuberclefruit < 2.5 cm; seed 0 or irregularly shaped, < 3 mm ..... C. fosbergii

6' Spines 9–16 per tubercle; fruit 2.5–3.5 cm; seed ± spheric, ± 3 mm ..... C. munzii

1' Fruit generally spiny, generally dry at maturity

7. Stem < 1 cm diam, tubercle generally < 1 mm high ..... C. ramosissima

7' Stem > 1.5 cm diam, tubercle > 3 mm high

8. Terminal stem segment generally < 1 dm, tubercle length < 2 × width

9. Generally erect shrubs with 1 to few  to erect main trunks, distance between trunk  (main branches) generally >= 10 cm, with 1–2 branches per trunk ; inner perianth parts yellow-green; filaments green to pale yellow; styles pale yellow-green ..... C. echinocarpa

9' Generally low shrubs with several decumbent to ascending main trunks, distance between trunk nodes generally < 5 cm, with >= 3 branches per trunk node; inner perianth parts pale to dark pink-purple, occasionally pale yellow-green; filaments generally tinged pink-purple; style generally tinged pale to dark pink-purple ..... C. chuckwallensis

8' Terminal stem segment generally > 1 dm, tubercle length > 3 × width

10. Stem generally branched only distally; trunk generally 1; inner perianth parts generally yellow ..... C. acanthocarpa var. acanthocarpa

10' Stem generally branched near base; trunks several to many; inner perianth parts yellow-green, yellow, bronze, to red

11. Filaments red to magenta; perianth parts yellow, bronze, to red; e DSon (extreme se San Diego Co., sw Imperial Co.) ..... C. wolfii

11' Filaments green to yellow; perianth parts yellow to yellow-green; sw SnJV (Cuyama Valley), s SCoRO (Cuyama River Canyon), s SCo, PR, DSon

12. Stem decumbent to erect, spines appearing sparse, tubercles generally < 20 mm, oval; coastal, < 250 m ..... C. californica var. californica (2)

12' Stem erect, spines rather dense or if appearing sparse then tubercles generally > 20 mm, elliptic to elongate; inland, generally > 250 m

13. Spines generally not prominent, not obscuring young stem segments; stem segments 14–43 cm, tubercles 16–35 mm ..... C. bernardina (2)

13' Spines prominent, obscuring young stem segments; stem segments 10–26 cm, tubercles 11–25 mm ..... C. ganderi


Please use this Google Form for Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) . Jepson 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 .

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.