Spiny Amaranth

(Amaranthus spinosus)

Spiny amaranth

Characteristics
Seedling Leaves Flowers Fruit
Spiny amaranth seedling Spiny amaranth leaves Spiny amaranth flowers Spiny amaranth fruit

Growing habits: Erect, branched summer annual

Root anatomy: Fibrous roots from well-developed taproot, may or may not be red

Leaf anatomy: Alternately arranged, simple, glabrous, two stiff sharp spines per node

Flowers: Terminal with numerous axillary clusters, flowers in terminal spikes male while basal flowers mostly female

References: Weeds of the South by Charles T. Bryson and Michael S. DeFelice