Amaranthus spinosus L. - Spiny Amaranth
Family - Amaranthaceae
Stems - No info. yet.
Leaves - No info. yet.
Inflorescence - No info. yet.
Globular cluster of flowers in the stem axils...
Spines subtending the globular clusters.
Flowers - No info. yet.
Flowering - June - October.
Habitat - Waste ground, cultivated fields, disturbed sites, roadsides, railroads.
Origin - Native to tropical America.
Other info. - This scuzzy introduced weed can be found throughout Missouri and can be quite common in the habitats mentioned above. The plant is easy to identify because of its reddish stems and stout spines, which subtend the axillary flower clusters. Many plants in the genus Amaranthus can look alike.
Photographs taken off Main St., Ellington, MO., 7-18-04.