1. Friendship is the only one thornless rose in the word.

2. Khat ( Catha edulis ) is a large, thornless, flowering evergreen shrub , having manyarticulate branches.

3. Friendship is the only one thornless rose in the world.

4. Invaders such as purple-flowered Asian melastome and strawberry guava threaten to overrun delicate Hawaiian natives such as thornless roses and delicate tree ferns.

5. 'Oh no, this is the beginning of the end, ' said Bob Halliday, a Bangkok-based food writer, when told about the odourless durian. 'Making a non-smelly durian is like a thornless rose.

6. Over the last few years, disease-resistant single-flowered roses have been introduced, including 'Kew Gardens', a white thornless variety that flowers nonstop.