1. Annual aromatic weed of Pacific coastal areas (United States and northeastern Asia) having bristle-pointed leaves and rayless yellow flowers
   - rayless chamomile, Matricaria matricarioides

Derived forms: pineapple weeds

Type of: herb, herbaceous plant

Part of: genus Matricaria, Matricaria

Encyclopedia: Pineapple weed

• Spenser
• Spenserian sonnet
• Spenserian stanza
• spent
• Spergula
• Spergula arvensis
• Spergularia
• Spergularia rubra
• sperm
• sperm bank
• sperm cell
• sperm count
• sperm oil
• sperm whale
• sperm-filled
• spermaceti
• spermary
• spermatheca
• spermatic
• spermatic cord
• spermatid
• spermatocele
• spermatocide
• spermatocyte
• spermatogenesis