Brown was studying pollen grains of the plant Clarkia pulchella suspended in water under a microscope when he observed minute particles, ejected by the pollen grains, executing a jittery motion.
Clarkia pulchella is most famous for its use by botanist Robert Brown in the discovery of Brownian motion.
Clarkia | Heliamphora pulchella | Clarkia, Idaho | Melaleuca pulchella | Clarkia borealis | ''Glandularia pulchella | Clarkia pulchella | Banksia pulchella |