Landscape Gardening Questions and Answers

Answer: C

The answer is Colour, as the Commission's key has it.

In landscape design the basic principles are the rules of arrangement: balance, rhythm (repetition and flow), simplicity, and with them emphasis, proportion and unity. Colour belongs to the other group, the elements or materials of design, alongside line, form and texture; it is something a designer uses, not a rule of arrangement.

A caution: a few lists do name colour among the principles, which is the only reason the question is debatable. The key follows the usual split between elements and principles.

Answer: B

The tree with a drooping habit is the Bottle brush.

The weeping bottle brush (Callistemon viminalis) has long, pendulous branches that hang down and carry red brush-like flower spikes at their tips, which makes it a common choice in Indian gardens for its weeping form.

The other trees have spreading crowns rather than weeping branches: the banyan spreads widely on its prop roots, and jacaranda and the golden rain tree form open, rounded or umbrella-like crowns. None of them is grown for a drooping habit.