Sonoran Desert Naturalist >>> Field Guide >>> Sonoran Desert Flora >>> Loasaceae

Sonoran Desert Loasa

Mostly perennial herbs in the Sonoran Desert. Flowers with numerous stamens and with the ovary inferior, i.e. positioned below the flower petals/sepals. Leaves with stiff, often hooked or stinging hairs. Several species, two shown.

Adonia Blazing Star

Mentzelia multiflora

Sandpaper Plant

Petalonyx thurberi

Pen & Ink illustration © Mike Plagens

Elongate, wavy toothed leaves are stiff and act like Velcro® - they will adhere to clothing or fur. Bright yellow flowers with many petals. Found along sandy washes in the Sonoran Desert. Detailed Description

Pen & Ink illustration © Mike Plagens

Short, deltoid shaped leaves are very rough and feel like sandpaper! Whitish flowers with complex morphology in a spike at ends of twigs. Below flowers on the spikes there may be few to many dead and bleached pale leaves or leaf-like bracts attached. Found in deep sand along washes or near river flood plains in the Sonoran Desert. Detailed Description


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Copyright Michael J. Plagens, 1999-2008