11. The thought of picking thornless blackberries in a parklike setting would have amused generations of Southerners. 12. But in a cruel twist of nature, the thornless variety also has a tiny heart. 13. But the thornless plants that produce the sweet berries Americans prefer to eat are not completely thornless. 14. But the thornless plants that produce the sweet berries Americans prefer to eat are not completely thornless . 15. Roses that Japanese beetles hate ( they breed thornless roses, don't they ? ). 16. The thornless , though easier to pick, doesn't have enough acidity, he says. 17. Nearly thornless , its 10-to 20-foot canes can be trained against a wall. 18. Recent breeding has resulted in cultivars that are thornless and more strongly upright, not needing staking. 19. Some cultivars have been selected for being thornless ( making harvesting easier ) and for larger fruit. 20. In 1997 the Chicago Department of Transportation planted 81 trees around the column including Washington and thornless cockspur.
