Pholisma sonorae

A parasitic plant native to the Sonoran Desert

Pholisma sonorae, commonly known as sandfood, is a unique parasitic plant native to the Sonoran Desert. It is a member of the family Boraginaceae and is notable for its unusual appearance and ecological role.

Description

Pholisma sonorae in the Sonoran Desert

Pholisma sonorae is a perennial herb that grows partially underground. The plant lacks chlorophyll and relies on its host plants for nutrients. It has a fleshy, subterranean stem that can extend up to 2 meters in length. The above-ground portion of the plant is typically a small, purplish or grayish flower head that emerges from the sand.

The flowers of Pholisma sonorae are tubular and can vary in color from pale lavender to deep purple. The plant blooms in the spring, usually after rainfall, and is pollinated by insects.

Habitat and Distribution

Pholisma sonorae is found in sandy soils of the Sonoran Desert, which spans parts of Arizona, California, and Mexico. It thrives in areas with loose, well-drained sand dunes and is often associated with host plants such as desert shrubs and cacti.

Ecology

As a parasitic plant, Pholisma sonorae attaches its roots to the roots of host plants to obtain water and nutrients. This relationship allows it to survive in the harsh desert environment where resources are scarce. The plant plays a role in the desert ecosystem by providing food for certain insects and possibly influencing the distribution of its host plants.

Conservation

While not currently listed as endangered, Pholisma sonorae faces threats from habitat destruction due to human activities such as off-road vehicle use and development. Conservation efforts focus on protecting its natural habitat and understanding its ecological interactions.

Related pages

• Parasitic plant
• Sonoran Desert
• Boraginaceae