1. Of Europe (except the Mediterranean area) and the northern United States
   - Potamogeton gramineous

Derived forms: variously-leaved pondweeds

Type of: pondweed

Part of: genus Potamogeton, Potamogeton

• Oreortyx picta palmeri
• Orestes
• Orff
• organ
• organ donor
• organ loft
• organ of Corti
• organ of hearing
• organ of speech
• organ pipe
• organ stop
• organ transplant
• organ-grinder
• organdie
• organdy
• organelle
• organic
• organic brain syndrome
• organic chemistry
• organic compound
• organic disorder
• organic evolution
• organic fertiliser
• organic fertilizer
• organic law