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

Key to Equisetum

View taxon page for Equisetum

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

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

1. Stem branches regular

2. Basal  of branch > subtending nodal  ..... E. arvense (2)

2' Basal internode of branch < subtending nodal sheath

3. Sheath teeth 5–10 ..... E. palustre (2)

3' Sheath teeth 14–28 on sterile stem, 20–30 on fertile stem ..... E. telmateia subsp. braunii (2)

1' Stem branches 0 or irregular

4. Stem brown, fleshy, lasting < 1 month irregularly in spring

5. Sheath teeth 6–14 on sterile stem, 6–10 on fertile stem ..... E. arvense (2)

5' Sheath teeth 14–28 on sterile stem, 20–30 on fertile stem ..... E. telmateia subsp. braunii (2)

4' Stem green, firm, lasting > 1 month

6. Spores white, misshapen ..... E. ×ferrissii

6' Spores green, spheric

7. Sheath teeth 5–10, persistent ..... E. palustre (2)

7' Sheath teeth 10–50, generally deciduous

8. Cone tip pointed; sheath generally with 2 dark bands, 1 at base, 1 at tip; stem  herb, generally scabrous ..... E. hyemale subsp. affine

8' Cone tip rounded; sheath generally with 1 dark band, at tip; stem annual (perennial herb in s), generally not scabrous ..... E. laevigatum


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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 .

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