great St John's wort

Definitions of great St John's wort
1

n perennial shrub having large star-shaped yellow flowers in narrowly pyramidal cymes

Synonyms:
Hypericum ascyron, Hypericum pyramidatum
Type of:
St John's wort
any of numerous plants of the genus Hypericum having yellow flowers and transparently dotted leaves; traditionally gathered on St John's eve to ward off evil

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