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A scientific synonym of this species is Cassia marilandica. Another common name of this wildflower is Southern Wild Senna, because its range doesn't extend as far north as a closely related species, Senna hebecarpa (Wild Senna). These two species are very similar in appearance and they are occasionally confused with each other. The flowers of Maryland Senna have styles with short appressed hairs, while the flowers of Wild Senna have styles with long spreading hairs. Maryland Senna also tends to produce fewer flowers than Wild Senna, although variations in environmental conditions can produce exceptions to this rule.


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© John Hilty

Source: Illinois Wildflowers

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