1. Perennial shrub having large star-shaped yellow flowers in narrowly pyramidal cymes
   - great St John's wort, Hypericum ascyron

Type of: St John's wort

• thermonuclear reactor
• thermonuclear warhead
• thermophile
• thermophilic
• thermopile
• thermoplastic
• thermoplastic resin
• Thermopsis
• Thermopsis macrophylla
• Thermopsis villosa
• Thermopylae
• thermoreceptor
• thermoregulator
• thermos
• thermos bottle
• thermos flask
• thermoscope
• thermoset
• thermosetting
• thermosetting compositions
• thermosetting resin
• thermosphere
• thermostat
• thermostatic
• thermostatically