Hypericum

noun

1. large almost cosmopolitan genus of evergreen or deciduous shrubs and herbs with often showy yellow flowers; cosmopolitan except tropical lowlands and Arctic or high altitudes and desert regions

   noun.plant

   Synonyms genus hypericum

   Source: WordNet 3.0

2. A genus of plants, generally with dotted leaves and yellow flowers; -- called also <i>St. John's-wort</i>.

   noun

   Source: webster1913