1. Perennial stoloniferous thistle of northern Europe with lanceolate basal leaves and usually solitary heads of reddish-purple flowers
   - melancholy thistle, Cirsium heterophylum

Type of: thistle

• silky oak
• silky pocket mouse
• silky tamarin
• silky terrier
• silky willow
• silky wisteria
• silky-haired
• silky-leafed
• silky-leaved
• sill
• sillabub
• Sillaginidae
• Sillago
• sillcock
• sillily
• silliness
• sillock
• Sills
• silly
• silly billy
• silly season
• silo
• siloxane
• Silphium
• Silphium laciniatum