Possible Clues:

• Tree initially as charming as collection in arboretum
• Tree or shrub, wattle
• Mimosa family shrub
• A chartered accountant spies a shrub
• Flowering shrub a couple of accountants found around island
• Excellent returns shown by two accounts in plant
• Thorny savanna tree
• Shrub or tree with clusters of white or yellow flowers
• Wattle tree or shrub
• One with roots in California a US agency arrests