Dwarf branching glandular pubescent annuals with simple petiolate leaves and large campanulate racemose flowers. Calyx deeply 5-partite. Corolla tubular - campanulate, inflated at the base. Stamens exceeding the corolla; filaments with an appendage at the base. Capsule many-seeded. Named in honour of Francis Whitla, a patron of botany.

1. W. grandiflora. - This is a very showy plant with large deep blue Campanula-like flowers and deltoid or oblong coarsely-toothed hispid leaves. A native of California.