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Fourpoint Evening Primrose

oenothera rhombipetala

The Fourpoint Evening Primrose is a striking biennial or annual wildflower native to the sandy regions of the central United States. It stands out in its native habitats due to its tall, erect spikes covered in numerous bright yellow flowers. Like other members of the evening primrose family, this plant plays a crucial ecological role by opening its blossoms late in the day, providing an essential nectar source for nocturnal and crepuscular insects, especially sphinx moths. Its ability to colonize nutrient-poor, sandy soils makes it a vital pioneer species that helps stabilize loose soil and prevent erosion.

Lebensraum: Typically found in sandy soils, sand prairies, open dunes, disturbed roadsides, and waste areas of the central United States.

Aussehen

This species typically grows as a single, hairy stem rising up to 100 centimeters. It features lance-shaped, greyish-green leaves that are lightly covered in fine hairs. The defining feature is the terminal spike of flowers, where each blossom displays four distinct, bright yellow petals that are noticeably diamond-shaped (rhombic) and taper to a point. The flowers open progressively from the bottom of the spike upward, accompanied by long, narrow floral bracts.

ReichPlantaeStammTracheophytaKlasseMagnoliopsidaOrdnungMyrtalesFamilieOnagraceaeGattungOenothera
Fourpoint Evening Primrose
Fourpoint Evening Primrose

Kategorie

Pflanzen

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

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Interessante Fakten

Because it thrives in nutrient-poor sand, it is frequently used in ecological restoration projects to stabilize soils and initiate plant succession on degraded land.

The specific epithet 'rhombipetala' is a direct reference to the unique, diamond-like rhombic shape of its four yellow petals.

Unlike many plants that open flowers imperceptibly, the blossoms of this species can sometimes be observed unfolding in real-time at dusk within just a few minutes.

Besondere Fähigkeiten

Fähigkeit

Nocturnal Blooming

Opens its yellow blossoms rapidly at dusk to target nocturnal pollinators, such as hawkmoths, avoiding daytime nectar thieves.

Fähigkeit

Psammophilic Adaptation

Possesses a deep, robust taproot and specialized hairy foliage that allow it to anchor and thrive in dry, shifting sand dunes.

Fähigkeit

Delayed Germination

Produces seeds that can remain dormant in sandy soil seed banks for multiple years until ideal moisture and light levels occur.

Maße und Details

Länge
30-100 cm
Lebenserwartung
1-2 Jahre

Ernährung und Fütterung

As a photosynthetic autotroph, this plant synthesizes its own organic compounds using sunlight, water, carbon dioxide, and essential soil minerals.

Hauptnahrung

  • Sunlight
  • Water
  • Carbon dioxide
  • Nitrogen
  • Phosphorus

Nahrungssuche

  • Photosynthesis

Ökologische Zusammenhänge

eaten by

Primrose Moth

Schinia florida

The caterpillar of this moth feeds directly on the developing flowers and seed pods of the primrose.

mutualism

White-lined Sphinx Moth

Hyles lineata

This large moth is a key nocturnal pollinator, drinking nectar from the freshly opened evening flowers.

mutualism

Western Honey Bee

Apis mellifera

Visits the flowers during the early morning hours before they wither in the midday heat, collecting remaining pollen.

Merkmale

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Sammlungen

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Sicherheit

Gefahr

1/5 · Sehr gering

Noch keine besonderen Sicherheitshinweise.

Häufig gestellte Fragen

Wie identifiziert man Fourpoint Evening Primrose?

Der einfachste Weg, Fourpoint Evening Primrose zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Fourpoint Evening Primrose?

30-100 cm

Was ist der/die/das lebenserwartung von Fourpoint Evening Primrose?

1-2 Jahre

Was frisst Fourpoint Evening Primrose?

As a photosynthetic autotroph, this plant synthesizes its own organic compounds using sunlight, water, carbon dioxide, and essential soil minerals.

Wo findet man Fourpoint Evening Primrose normalerweise?

Typically found in sandy soils, sand prairies, open dunes, disturbed roadsides, and waste areas of the central United States.

Wie jagt Fourpoint Evening Primrose?

Photosynthesis

Snap-Karte

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Neueste Snaps

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