1. Coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico
   - western ragweed, perennial ragweed

Type of: ambrosia, bitterweed, ragweed

• octa-
• octad
• octadecanoic acid
• octagon
• octagonal
• octahedral
• octahedron
• octal
• octal digit
• octal notation
• octal number system
• octal numeration system
• octameter
• octane
• octane number
• octane rating
• octanedioic acid
• octangular
• Octans
• octant
• octave
• Octavian
• octavo
• octennial
• octet