Oenothera perennis L.

Sundrops

Day-flowering perennial to 70 cm or so tall. Basal leaves oblanceolate to spoonshaped, 2.5-5 cm long. Flowers nodding in bud, petals 6-8 mm long, yellow. Fruit capsule club-shaped to oblong. Syn. O. pumila L.

E North America.

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.

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kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Myrtales
family       Onagraceae
genus        Oenothera L.