Senna hebecarpa – Wild Senna

Botanical Family: Fabaceae

Bloom Time July – August

Pollen Characteristics

Dispersal Unit Monad

Aperture Number 3

Aperture Type Compound

Ornamentation Granulate/Perforate

Tectum Eutectate

Size (um) 

Shape Round

Pollen Color 

Honey Bee Resources

Pollen Source

Nectar Source

Wild Senna is a favorite pollen source of bumble bees, due to its high protein-to-lipid ratios, and is a great choice for any garden wanting to support their native bees, particular bumbles. Interestingly, Wild Senna’s flowers do not have nectaries, instead the plant has evolved extrafloral nectaries, which are separate from the flowers. They are positioned on the leaf petioles near their attachment to the primary plant stem.


Xerces Society for Invertebrate Conservation (2017). Plants for Pollinators: Wild Senna 

Sara Lajeunesse (2016). Picky Eaters: Bumble Bees Prefer Plants with Nutrient Rich Pollen. Penn State News 

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