Named for H.G. Bloomer (1821–1874), Californian botanist.

Perennial, cormous, tunicate herb. Leaves linear, keeled, sheathing. Flowers open bell-shaped. Inflorescence a several-flowered umbel, terminal. Tepals 3+3, free. Stamens 6, free but each with a basal cup. Ovary ovoid, not stalked. Fruit a capsule. Seeds numerous, black.

Sometimes cultivated as a spring-flowering bulb on well-drained soil.

2 species from California and Mexico.

Cormous plant with flowers in an umbel, anthers free but with a basal cup.

Source: Conran, J. (2005). Themidaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.