Fringed Amaranth

Amaranthus fimbriatus

Fringed Pigweed, Amaranthus fimbriatus, photo © by Michael Plagens

Photographed in Vekol Valley, Maricopa Co., Arizona. Aug 10, 2008.

ANNUAL: Warm season annual occasionally reaching one meter in height. One or a few erect stems. Not present in winter season or after extended drought.

LEAVES: Leaves are narrow elongate, alternate on the stems.

FLOWERS: Numerous small flowers in terminal spikes. Light green or pale. The tips of the spikes often curve downwards. Separate male (staminate) and female (pistillate) flowers. With magnification note that pistillate sepals are fringed.

RANGE: Frequent throughout the Sonoran Desert in Arizona and Mexico on wash banks or in canyons often growing among shrubs and partial shade. Also found from California to Texas.

FRUIT: Dry single-seeded achenes subtended by papery sepals and bracts.

UNARMED. Once the spikes of flowers mature and go to seed the surrounding bracts may be slightly prickly.

Amaranthaceae -- Amaranth Family

More Information:

Sonoran Desert Field Guide
Sonoran Desert Places
Sonoran Desert Naturalist Home Page

Copyright Michael J. Plagens, Page created 4 Sept. 2008,
updated 10 Oct. 2023.