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Key to SennaView 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  Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). axis between leaflet  A leaf-like unit of a compound leaf; distinguished from a leaf by the absence in its axil of a bud, branch, thorn, or flower; lacking lateral, basal appendages (stipules); either simple (leaf 1-compound, with primary leaflets) or compound (leaf 2-compound, with primary and secondary leaflets; 3-compound, with primary, secondary, and tertiary leaflets, etc). pairs; plant densely hairy ..... S. covesii 2' Leaflets 12–18; gland(s) near base of petiole  Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct. ; plant glabrous ..... [S. marilandica] 1' Shrub to small tree; leaflets generally 4–20 3. Shrubs of dry places; leaflets linear  Elongate, with nearly parallel sides; narrower than elliptic or oblong. or generally ovate  Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. , generally flat, persistent or < 1 cm, ephemeral 3' Shrubs to small trees generally not of dry places; leaflets oblong  Longer than wide, with nearly parallel sides; wider than linear. to elliptic  In the shape of a flattened circle or ellipse; wider than linear , not ephemeral 5. Stipules 6–17 mm, ovate-cordate, generally persistent; uppermost, unopened flowers covered by bracts; fruit flat, dehiscent  Opening at maturity to release contents; usually pertaining to anthers or fruits. ..... S. didymobotrya 5' Stipules 3.5–7 mm, lanceolate  Narrowly elongate, widest in the basal half, often tapered to an acute tip. , ephemeral; uppermost, unopened flowers not covered by bracts; fruit not flat, indehiscent  Not opening inherently to release contents; usually pertaining to fruits. ..... S. multiglandulosa
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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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