S. polyclada may refer to:

• Schefflera polyclada, a plant endemic to Papua New Guinea
• Scorzonera polyclada, a flowering plant

• The Underpants
• The Understanding (Röyksopp album)
• The Undertaker
• The Undertaker (live album)
• The Undertones
• The Underwater Menace
• The Underwood Tariff Act
• The Underworld Story
• The Underworld (venue)
• Theun de Vries
• The Undiscovered
• The Undiscovered Country (album)
• The Undisputed Truth
• The Uneasy Case for Copyright
• The Unexpurgated Code
• The Unfaithful
• The Unfaithful Wife
• The Unfettered Shogun
• The Unforgettable Fire
• The Unforgiving Sounds of Maow
• The Unfortunate Traveller
• The Ungoverned
• The Unholy Alliance (professional wrestling)
• The Unholy Four
• The Unholy War