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Cabeza Prieta Natural History Association
Sonoran Desert Plants
Polygonum argyrocoleon (Silver-sheath Knotweed)

Ajo Peak at Night


Habitat: roadsides, disturbed areas
Life Form: forb,annual
Leaf Description: alternate simple
Flower Color: white or whitish
Flowering Period: Feb. to Oct.
Spines: spineless
Family: Polygonaceae (buckwheat family)
Abundance: common
Additional Information:
Felger, R.S. and S. Rutman. 2015. Ajo Peak to Tinajas Altas: Flora of Southwestern Arizona Part 19. Eudicots: Polygalaceae to Simmondsiaceae. Phytoneuron 2016-47: 1-71. Published 23 June 2016. ISSN 2153 733X page 22 (13.7 MB pdf)

Our member horticultural expert is Hank Jorgensen. For more information on this plant species, see Hank's page on Polygonum argyrocoleon (opens in a new tab).






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Natural History of the Sonoran Desert and Refuge