Oenothera L.

Evening Primrose

Classical name possibly from the Greek oinos — wine, thera — pursue, imbibe; probably referring to the one-time use of the roots of plants in this genus for wine-making.

Annual, biennial or perennial herbs or subshrubs, mostly erect, rarely more or less stemless. Leaves alternate, simple, entire to deeply lobed, often wavy, with or without a stalk, those in the basal rosette often slightly different from those along the stem. Flowers regular, solitary or in spike-like clusters. Sepals and petals 4. Calyx tube generally elongated and prominent. Petals mostly yellow, sometimes pink or white, often becoming pink or darkening with age. Stamens 8. Ovary 4-chambered; stigma 4-lobed. Fruit a cylindrical or club-shaped loculicidal capsule.

Known horticulturally for the flowers of some species which open in the evening, producing a very attractive scent, then fade the next day.

The genus includes, unfortunately, several cosmopolitan weeds and is represented in all Australian states by weedy species, about 15 in all; for this reason extreme care should be taken in their cultivation.

About 120 species, mostly from temperate America.

Seeds or division.

Petals not narrowing at the base; anthers attached at the centre; calyx tube generally long.

Raven (1962a), Dietrich (1977), Straley (1977), Raven et al. (1980), Dietrich & Wagner (1988).

Source: Waldron, M.; Spencer, R. (2002). Fuchsia. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.

Hero image
kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Myrtales
family       Onagraceae
Higher taxa
Subordinate taxa
species         Oenothera acaulis Cav.
species         Oenothera biennis L.
species         Oenothera caespitosa Nutt.
species         Oenothera fruticosa L.
species         Oenothera glazioviana Micheli
species         Oenothera missouriensis Sims
species         Oenothera perennis L.
species         Oenothera rosea L'Hér.
species         Oenothera speciosa Nutt.
species         Oenothera stricta Link
species         Oenothera tetragona Roth