hypericum

from WordNet (r) 3.0 (2006)

Hypericum
    n 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 [syn: {Hypericum}, {genus
         Hypericum}]

from The Collaborative International Dictionary of English v.0.48

Hypericum \Hy*per"i*cum\, n. [L., fr. Gr. ?, ?; ? under, among +
   ?, ?, heath, heather.] (Bot.)
   A genus of plants, generally with dotted leaves and yellow
   flowers; -- called also {St. John's-wort}.
   [1913 Webster]

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