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

Key to Senna

View taxon page for Senna

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

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

1. Perennial herb to subshrub; leaflets generally 4–18

2. Leaflets 4–8; gland(s) on main leaf axis between leaflet pairs; plant densely hairy ..... S. covesii

2' Leaflets 12–18; gland(s) near base of petiole; plant glabrous ..... [S. marilandica]

1' Shrub to small tree; leaflets generally 4–20

3. Shrubs of dry places; leaflets linear or generally ovate, generally flat, persistent or < 1 cm, ephemeral

4. Stem, leaf ± glabrous; leaflets 4–8, 4–6 mm ..... S. armata

4' Stem, leaf sparsely to densely hairy; leaflets 6–16, 10–25 mm ..... S. artemisioides

3' Shrubs to small trees generally not of dry places; leaflets oblong to elliptic, not ephemeral

5. Stipules 6–17 mm, ovate-cordate, generally persistent; uppermost, unopened flowers covered by bracts; fruit flat, dehiscent ..... S. didymobotrya

5' Stipules 3.5–7 mm, lanceolate, ephemeral; uppermost, unopened flowers not covered by bracts; fruit not flat, indehiscent ..... S. multiglandulosa


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].

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.