Abstract
The species Handroanthus heptaphyllus (ipe purple seven leaflets) belongs to the family Bignoniaceae, with about 120 genera and 800 species, 100 species currently included in the genera Tabebuia and Handroanthus. Its seeds are classified as orthodox, though not tolerate long periods of storage. Still, some studies suggest an action of inhibition of seed germination by the action of phenol…