Jepson eFlora
Key to families | Table of families and genera

Key to Senna

View taxon page for Senna

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].
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