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Brown-Eyed Susan

Image of Brown Eyed susan
Photo by David J. Stang, CC BY-SA 4.0, via Wikimedia Commons

Brown Eyed Susan (Rudbeckia triloba)

Rudbeckia triloba, native to North America and part of the Asteraceae family, is commonly found along roadsides and in public gardens (Zamyad, Abasnejad, Esmaeili-Mahani, & Mostafavi, 2016).  One study on the biochemical properties of Rudbeckia triloba found that it contains substances that can help in reducing anxiety, alleviate asthma, and reduce the size of cancerous tumors (Chen et al., 2015; Moldovan, Buleandra, Oprea, & Minea, 2017).   

Latest Research

  • Studies on Chemical Composition and Antioxidant Activity of Rudbeckia triloba
    by Zenovia Moldovan on December 28, 2017 at 11:00 am

    The paper describes the physicochemical studies made on the decorative plant, Rudbeckia triloba (Asteraceae). For this purpose, essential oil, infusion, decoction, and hydroalcoholic macerate obtained from different aerial parts of Rudbeckia triloba were analyzed. The main phytochemical constituents identified by GC-MS analysis were found to be α-pinene (in dried leaves (46.0%) and flowers (40.1%)) and β-phellandrene (in essential oil of dried inflorescences (26.09%)). The Folin-Ciocalteu and…

  • Contrasting Foraging Patterns: Testing Resource-Concentration and Dilution Effects with Pollinators and Seed Predators
    by Alexandria Wenninger on June 9, 2016 at 10:00 am

    Resource concentration effects occur when high resource density patches attract and support more foragers than low density patches. In contrast, resource dilution effects can occur if high density patches support fewer consumers. In this study, we examined the foraging rates of pollinators and seed predators on two perennial plant species (Rudbeckia triloba and Verbena stricta) as functions of resource density. Specifically, we examined whether resource-dense patches (densities of flower and…

  • Ambrosanolides and other constituents of two rudbeckia species
    by A B Gutiérrez on June 1, 1990 at 10:00 am

    Aerial parts of RUDBECKIA SUBTOMENTOSA Pursh furnished four C-15 functionalized ambrosanolides, one of them new, as well as coumarin. Aerial parts of RUDBECKIA TRILOBA L. var. TRILOBA furnished coumarin and two closely related thiopheneacetylenes.


Chen, W., Liu, Y., Li, M., Mao, J., Zhang, L., Huang, R., . . . Ye, L. (2015). Anti-tumor effect of alpha-pinene on human hepatoma cell lines through inducing G2/M cell cycle arrest. Journal of Pharmacological Sciences, 127(3), 332-338. doi:10.1016/j.jphs.2015.01.008 

Moldovan, Z., Buleandra, M., Oprea, E., & Minea, Z. (2017). Studies on Chemical Composition and Antioxidant Activity of Rudbeckia triloba. J Anal Methods Chem, 2017, 3407312. doi:10.1155/2017/3407312 

Zamyad, M., Abasnejad, M., Esmaeili-Mahani, S., & Mostafavi, A. (2016). Alpha-pinene as the main component of Ducrosia anethifolia (Boiss) essential oil is responsible for its effect on locomotor activity in rats. Avicenna Journal of Neuro Psycho Physiology, 3(2), 29-34.