Oenothera Stricta

Title

Oenothera Stricta

Artist

Michaela Perryman

Medium

Photograph - Photography

Description

Oenothera flowers are pollinated by insects, such as moths and bees. Like many other members of the Onagraceae, however, the pollen grains are loosely held together by viscin threads, so only insects that are morphologically specialized to gather this pollen can effectively pollinate the flowers. Bees with typical scopa cannot hold it. Also, the flowers open at a time when most bee species are inactive, so the bees which visit Oenothera are generally vespertine temporal specialists: bees that forage in the evening. The seeds ripen from late summer to fall.
Oenothera are used as food plants by the larvae of some Lepidoptera species, including the large white-lined sphinx. The flower moths Schinia felicitata and S. florida both feed exclusively on the genus, and the former is limited to O. deltoides.

In the wild, some species of evening primrose act as primary colonizers, quickly appearing in recently cleared areas. They germinate in disturbed soils, and can be found in habitat types such as dunes, roadsides, railway embankments, and waste areas. They are often casual and are eventually out competed by other species.
Based on observations of evening primroses (Oenothera drummondii), a study discovered that within minutes of sensing the sound waves of nearby bee wings through flower petals, the concentration of the sugar in the plant's nectar was increased by an average of 20 percent. Experiments were also conducted on flowers with the petals removed. No change in nectar production was noted, indicating that it is indeed the flowers that have the job of the ears.

Chilean evening primrose, Chilean evening-primrose, common evening primrose, common evening-primrose, evening primrose, evening-primrose, fragrant evening primrose, fragrant evening-primrose, sand primrose, scented evening primrose, sweet scented evening primrose, sweet-scented evening-primrose.


This pretty plant is classified as an Environmental Weed in Western Australia
Photographed Ellis Brook, Western Australia, Spring.

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June 12th, 2020

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