1. Erect annual of tropical central Asia and Africa having a pair of divergent spines at most leaf nodes
   - thorny amaranth

Type of: herb, herbaceous plant

Part of: Amaranthus, genus Amaranthus

Encyclopedia: Amaranthus spinosus

• family Raphidiidae
• family Recurvirostridae
• family Reduviidae
• family Regalecidae
• family relationship
• family Resedaceae
• family Rhamnaceae
• family Rheidae
• family Rhincodontidae
• family Rhinobatidae
• family Rhinocerotidae
• family Rhinolophidae
• family Rhinotermitidae
• family Rhiptoglossa
• family Rhizobiaceae
• family Rhizophoraceae
• family Rhizopogonaceae
• family Rhodymeniaceae
• family Rhyniaceae
• family Rickettsiaceae
• family Roccellaceae
• family room
• family Roridulaceae
• family Rosaceae
• family Rubiaceae