Species › Plants › One-flowered Broomrape

One-flowered Broomrape

Orobanche uniflora

UncommonPlant
Illustration of One-flowered Broomrape (Orobanche uniflora)

One-flowered Broomrape is a remarkable non-photosynthetic parasitic plant that entirely lacks chlorophyll, instead drawing all its nutrients from the roots of host plants in the genera Sedum, Saxifraga, and relatives. Each pale stalk bears a single lavender to white flower that emerges directly from the soil in spring. It is widespread across North America but rarely seen due to its small size and cryptic appearance. Its flowers are visited by small bees. It represents one of nature's most specialized ecological relationships.

Habitat
Rocky or sandy soils where host plants (stonecrops, saxifrages) grow, woodlands and open areas
Diet
Pollinated by small native bees; parasitizes root systems of Sedum, Saxifraga, and related plants
How common
Uncommon

Best time to see a One-flowered Broomrape

The best time to see a One-flowered Broomrape is April–May, when about 78% of U.S. sightings happen, based on 6,603 research-grade iNaturalist observations.

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