original: Burrendong Arboretum is a sanctuary for endangered Australian flora and covers 1.60 km ².
simplifications: Burrendong Arboretum is a sanctuary for endangered Australian plants and spans 1.60 km ². Burrendong Arboretum is a safe place for endangered Australian plants. It is 1.60 km ² in size. Burrendong Arboretum is a sanctuary for endangered Australian plants, trees, and flowers. It covers 1.60 km ². Burrendong Arboretum is a refuge for endangered Australian plants. It covers 1.60 km ². Burrendong Arboretum is a safe place for endangered Australian flora. It is 1.60 km ². Burrendong Arboretum which covers over one and a half square kilometers is a safe place for Australian plants that need protection. Burrendong Arboretum is a safe place for endangered Australian plants. Burrendong Arboretum is a safe place for endangered Australian flora. It covers 1.60 km². Burrendong Arboretum is a park for threatened Australian plants and is 1.60 km2. Burrendong Arboretum covers 1.60 km ² and it is a sanctuary for endangered Australian plant life.