Possible Clues:

• Tropical American shrub with flamboyant spikes of yellow or orange flowers
• Tropical American shrub of the vervain family
• Ornamental evergreen bush of the vervain family
• Tropical American shrub of the vervain family with spikes of yellow or orange flowers
• Bush's networking set-up to beat Osama finally
• Plant an Amazonian must get pruned?
• Perennial herb with florets sometimes called 'ham and eggs'
• American shrub? It's a new Natal hybrid
• In Californian city there's a new brown plant
• Tropical perennial herb