
Bravo-Hollis, Dr. Helia (1901–2001)—discoverer, describer and scholar of taxa of Cactaceae in Mexico—one
of the founders of Sociedad Mexicana de Cactología (Mexican Cactus Society) in 1951.

Bolus, [née Kensit] Dr Harriet Margaret Louisa (1877-1970)—taxonomic botanist and describer of many new succulent taxa, with special interest in Mesembryanthemum.

Bailey, Dr Liberty Hyde, Jr (1858–1954)—author of popular Hortus book and many scientific papers—known as the 'Dean of American Horticulture'.